US3723205A - Gas generating composition with polyvinyl chloride binder - Google Patents
Gas generating composition with polyvinyl chloride binder Download PDFInfo
- Publication number
- US3723205A US3723205A US00141311A US3723205DA US3723205A US 3723205 A US3723205 A US 3723205A US 00141311 A US00141311 A US 00141311A US 3723205D A US3723205D A US 3723205DA US 3723205 A US3723205 A US 3723205A
- Authority
- US
- United States
- Prior art keywords
- alkali metal
- gas
- polyvinyl chloride
- halogen
- composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000203 mixture Substances 0.000 title abstract description 54
- 229920000915 polyvinyl chloride Polymers 0.000 title abstract description 21
- 239000004800 polyvinyl chloride Substances 0.000 title abstract description 21
- 239000011230 binding agent Substances 0.000 title description 10
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 39
- -1 ALKALI METAL SALT Chemical class 0.000 abstract description 33
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 20
- 238000002485 combustion reaction Methods 0.000 abstract description 15
- 239000004014 plasticizer Substances 0.000 abstract description 15
- 150000003839 salts Chemical class 0.000 abstract description 14
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 10
- 239000001569 carbon dioxide Substances 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 229910001868 water Inorganic materials 0.000 abstract description 10
- 229910052736 halogen Inorganic materials 0.000 abstract description 9
- 150000002367 halogens Chemical class 0.000 abstract description 9
- 239000001257 hydrogen Substances 0.000 abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 8
- 229910001508 alkali metal halide Inorganic materials 0.000 abstract description 7
- 150000008045 alkali metal halides Chemical class 0.000 abstract description 7
- 231100000331 toxic Toxicity 0.000 abstract description 7
- 230000002588 toxic effect Effects 0.000 abstract description 7
- 239000000446 fuel Substances 0.000 abstract description 6
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical class [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 230000001590 oxidative effect Effects 0.000 abstract description 3
- 239000007800 oxidant agent Substances 0.000 description 34
- 239000007789 gas Substances 0.000 description 27
- 239000000047 product Substances 0.000 description 16
- GDDNTTHUKVNJRA-UHFFFAOYSA-N 3-bromo-3,3-difluoroprop-1-ene Chemical compound FC(F)(Br)C=C GDDNTTHUKVNJRA-UHFFFAOYSA-N 0.000 description 12
- 150000001340 alkali metals Chemical class 0.000 description 10
- 231100000252 nontoxic Toxicity 0.000 description 10
- 230000003000 nontoxic effect Effects 0.000 description 10
- 239000003380 propellant Substances 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 6
- 239000000460 chlorine Substances 0.000 description 6
- 229910052801 chlorine Inorganic materials 0.000 description 6
- 239000000567 combustion gas Substances 0.000 description 6
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- 229920012485 Plasticized Polyvinyl chloride Polymers 0.000 description 5
- 229910001964 alkaline earth metal nitrate Inorganic materials 0.000 description 5
- 238000000354 decomposition reaction Methods 0.000 description 5
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 5
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000009972 noncorrosive effect Effects 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 5
- 229920001944 Plastisol Polymers 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 229910001514 alkali metal chloride Inorganic materials 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Inorganic materials [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000004999 plastisol Substances 0.000 description 4
- 229910001487 potassium perchlorate Inorganic materials 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000001723 curing Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 229910001854 alkali hydroxide Inorganic materials 0.000 description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 2
- ZFMQKOWCDKKBIF-UHFFFAOYSA-N bis(3,5-difluorophenyl)phosphane Chemical compound FC1=CC(F)=CC(PC=2C=C(F)C=C(F)C=2)=C1 ZFMQKOWCDKKBIF-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical group [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical group [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- PYGXAGIECVVIOZ-UHFFFAOYSA-N Dibutyl decanedioate Chemical compound CCCCOC(=O)CCCCCCCCC(=O)OCCCC PYGXAGIECVVIOZ-UHFFFAOYSA-N 0.000 description 1
- AGUIVNYEYSCPNI-UHFFFAOYSA-N N-methyl-N-picrylnitramine Chemical group [O-][N+](=O)N(C)C1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O AGUIVNYEYSCPNI-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910001963 alkali metal nitrate Inorganic materials 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000001540 azides Chemical class 0.000 description 1
- PKVYKIKWKPWIMO-UHFFFAOYSA-N bis(2-butyloctyl) decanedioate Chemical group CCCCCCC(CCCC)COC(=O)CCCCCCCCC(=O)OCC(CCCC)CCCCCC PKVYKIKWKPWIMO-UHFFFAOYSA-N 0.000 description 1
- ISQGOXKDLGVOKQ-UHFFFAOYSA-N bis(3,5,5-trimethylhexyl) hexanedioate Chemical compound CC(C)(C)CC(C)CCOC(=O)CCCCC(=O)OCCC(C)CC(C)(C)C ISQGOXKDLGVOKQ-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- MIMDHDXOBDPUQW-UHFFFAOYSA-N dioctyl decanedioate Chemical compound CCCCCCCCOC(=O)CCCCCCCCC(=O)OCCCCCCCC MIMDHDXOBDPUQW-UHFFFAOYSA-N 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 125000005498 phthalate group Chemical class 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 231100000279 safety data Toxicity 0.000 description 1
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical class OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 231100000816 toxic dose Toxicity 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
- F42B3/045—Hybrid systems with previously pressurised gas using blasting to increase the pressure, e.g. causing the gas to be released from its sealed container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J7/00—Apparatus for generating gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C9/00—Life-saving in water
- B63C9/08—Life-buoys, e.g. rings; Life-belts, jackets, suits, or the like
- B63C9/18—Inflatable equipment characterised by the gas-generating or inflation device
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
- C06D5/06—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
Definitions
- An inflation system comprising a gas generator and an inflatable device wherein the gas generator contains a gasgenerating composition which produces combustion products free from corrosive, toxic, or inflammable components.
- the gas-generating composition comprises plasticized polyvinyl chloride fuel binder and a mixture of inorganic oxidizing salt and halogen-free alkali metal salt in a stoichiometry suflicient at the least to transform all car- 'bon, hydrogen, and halogen in the composition to carbon dioxide, water and alkali metal halide.
- Inflation is generally accomplished by means of a gas, such as air, nitrogen, CO helium, and the like stored under pressure and further pressurized and supplemented at the time of use by the addition of high temperature combustion gas products produced by the burning of a gas-generating composition.
- a gas such as air, nitrogen, CO helium, and the like stored under pressure and further pressurized and supplemented at the time of use by the addition of high temperature combustion gas products produced by the burning of a gas-generating composition.
- the inflation gases are solely produced by the gas-generating compositions.
- the gas-generating composition be capable of safe and reliable storage without decomposition or ignition at all temperatures likely to be encountered in the vehicle or other storage environment as, for example, up to temperatures as high as about 220 F. It is also important that substantially all of the combustion products generated during use be non-toxic, non-corrosive, and non-inflammable, particularly where the device is used in a closed environment such as an automobile.
- compositions employed hitherto have not met all of the above qualifications.
- Examples of compositions which have been used include black powder and plasticized nitrocellulose (double base) propellant compositions.
- the double base propellants are unstable at high ambient temperatures. Storage and use is generally restricted to temperatures below 140 F. Both black powder and double base propellant generate toxic and/ or inflammable gases.
- Double base propellants produce, in addition to carbon dioxide and Water, carbon monoxide and hydrogen, a mixture which is both toxic and inflammable. Black powder produces carbon monoxide in toxic concentrations as well as being relatively inefficient in volume of gas generated. The use of conventional composite propellants has also been suggested.
- pro pellants have reactive components and stoichi ometries which result in toxic, corrosive, or flammable combustion products, which, in addition to carbon monoxide and hydrogen, may include hydrogen chloride, alkali metal oxides or hydroxides, nitrogen oxides, and the like.
- gas-generating compositions which generate large volumes of gas, which can be stored without adverse degradation for periods as long as 5 to 10 years and which can be mass produced at low cost.
- gas-generating compositions employed in the gasgenerator of the inflation system of this invention have important advantages which result in significantly improved inflation systems. These advantages include inter alia:
- the invention is an improvement in conventional inflation systems comprising a gas generator and an inflatable device.
- the inflatable device may be a bag designed to act as a passive restraint to protect an automobile driver or passenger in case of collision, an aircraft escape chute, a life raft, and the like.
- the gas generator contains a gas-generating composition capable of producing gaseous combustion products which can be used to pressurize and supplement a primary inflation gas source, such as air, nitrogen, carbon dioxide, helium and the like, maintained under pressure in a separate storage chamber or to inflate the inflatable device directly without an additional gas supply.
- the improvement comprises gas-generating compositions which consist essentially of plasticized polyvinyl chloride fuel binder containing dispersed therein an inorganic oxidizer selected from the group consisting of ammonium perchlorate, alkali metal chlorate or perchlorate, alkaline earth metal nitrate, and mixtures thereof, hereinafter called primary oxidizer, and halogen-free alkali metal salt reactive with the combined chlorine in the polyvinyl chloride (and ammonium perchlorate if used as primary oxidizer) to form alkali metal chloride.
- the halogen-free alkali metal salt may also be an oxidizer in Whole or in part.
- Total oxidizer and halogen-free alkali metal salt are present in amount at least sufficient to oxidize all available carbon to carbon dioxide and all available hydrogen to Water and to convert all available combined chlorine to the alkali metal halide. Oxidizer and/ or alkali metal salt in excess of these stoichiometric requirements may be employed.
- the invention also comprises a method for inflating inflatable devices with gaseous combustion products which are non-toxic, non-corrosive, and non-flammable so that the devices can be safely employed in close proximity to human beings, particularly in confined spaces.
- the method comprises burning the gas-generating composition aforedescribed and injecting the gaseous combustion products into the inflatable device either solely or as a pressurizing supplement to a separate pressurized gas, such as air, nitrogen, carbon dioxide, or helium.
- FIG. 1 The figure is a longitudinal sectional view partly in elevation of an inflation system utilizing a gas generator and an inflation device in accordance with this invention.
- the improvement in the inflation system resides in loading the gas generator portion of the inflation system with a gas-generating composition
- a gas-generating composition comprising a plasticized polyvinyl chloride fuel binder containing dispersed therein an inorganic oxidizer salt selected from the group consisting of ammonium perchlorate, alkali metal chlorate or perchlorate, alkaline earth metal nitrates, and mixtures thereof, and a halogen-free, alkali metal salt, total oxidizer and alkali metal salt being present in amount at least sufficient to oxidize all avalaible carbon and hydrogen in the composition to carbon dioxide and water and to convert all available combined chlorine to the alkali metal halide.
- polyvinyl chloride as employed herein includes both the homopolymer and a copolymer containing up to about of a copolymerized component, such as vinyl acetate or vinylidene chloride.
- a copolymerized component such as vinyl acetate or vinylidene chloride.
- the polyvinyl chloride is essentially fully polymerized and employed in the form of plastisol-grade spheroidal particles.
- any organic liquid plasticizer compatible with polyvinyl chloride may be employed.
- plasticizers are wellknown in the art.
- the plasticizer is of the type suitable for fiuid plastisol formation, as, for example, alkyl and alkoxyalkyl adipates, sebacates, and phthalates, e.g. dibutyl and dioctyl sebacate, dibutyl, dioctyl, and dimethoxyethyl phtha ate, dibutyl dioctyl and di(3,5,5trimethylhexyl) adipate; glycol esters of higher fatty acids and the like.
- the plastisol-forming lasticizers are high boiling solvents for the polyvinyl chloride which form fluid suspensions with the resin particles at ordinary temperatures because of the low solubility at such temperatures and dissolve the resin at elevated temperatures to form a solid gel.
- the preferred ratio of polyvinyl chloride to plasticizer is generally from about 2 parts resin to 3 parts plasticizer to about 3 parts resin to about 2 parts lasticizer for desirable physical properties of the cured gasgenerating grains, such as tensile strength and minimum cold flow.
- the higher ratios of plasticizer to resin are desirable in order to maintain processability of the mix.
- physical property requirements are less exacting and the ratio of plasticizer to resin may be increased to as much as 2.5 to 1 while maintaining adequate physical properties of the solid gas-generating grain for the application.
- the fluid polyvinyl chloride-plasticizer slurries can accommodate up to as much as 90% of added solids if, as is well-known in the art, particle sizes of the added solids are properly selected and distributed, without loss of adequate fluidity to permit casting and curing without application of high pressures.
- the polyvinyl chloride-plasticizer slurry loaded with oxidizer and such other solids as may be required is cured simply by heating to the solution temperature of the polyvinyl chloride in the plasticizer, generally about 160 to 175 C. Since the polyvinyl chloride is fully polymerized, no potentially variable cure reaction occurs and the resulting cured gas-generating grains are highly reproducible and reliable. Polyvinyl chloride plastisol gas-generating propellants and process for making them are described in U.S. Pat. 2,966,403.
- the loaded polyvinyl chloride-plasticizer plastisol slurries are particularly amenable to curing and casting by extrusion as disclosed in U.S. Pat. 3,155,749. Briefly, the loaded slurry is introduced into an elongated extruder barrel through which it is advanced by a rotating worm screW with simultaneous generation of frictional heat, which together with heat supplied by means of a heating jacket provides the elevated temperature required for the solution cure. The mix is fully cured when it completes its passage through the extruder barrel though it is still in a sufliciently hot, soft state to be shaped by passage through a die after which the shaped extruding column is cooled and cut into grains of the desired length.
- the extrusion process is continuous and provides rapid, low-cost mass production of the gas-generating grains.
- Use of the specified primary inorganic oxidizer salts in combination with the halogen-free alkali metal salts in the amounts required by the specified stoichiometry provides maximized non-toxic, non-corrosive, non-flammable gas production and neutralization of the chlorine component in the polyvinyl chloride binder in the form of a non-toxic alkali metal chloride product.
- the primary oxidizers, in addition to oxygen, produce per se or by reaction with the halogen-free alkali metal salt additive, only non-toxic, non-corrosive, and non-flammable combustion products.
- the halogen-free alkali metal salt additive prevents formation of corrosive HCl or chlorine.
- the alkali metal e.g. Na, K, Li, chlorates and perchlorates form non-toxic alkali metal chlorides, with the remainder of the oxidizer salt molecules providing oxygen for combustion of the fuel.
- potassium perchlorate is generally preferred.
- Ammonium perchlorate is highly useful as an oxidizer because it increases gas production in the form of nitrogen and water and reduces the percentage of solid products. It also provides somewhat lower flame temperatures than the corresponding alkali metal salts.
- the HCl produced by ammonium perchlorate as a decomposition product is corrosive and must be neutralized by transformation into the alkali metal chloride. Thus, sufficient halogen-free alkali metal salt must be incorporated for this purpose as well as for the neutralization of the HCl decomposition product of the polyvinyl chloride resin binder.
- the alkaline earth metal nitrate oxidizer salts such as Ba(NO or Sr(NO decompose to form highly stable non-toxic oxides as combustion products and thus can be safely and efficiently used as oxidizers in gas-generating compositions. Since burning rates obtained with these oxidizers are generally lower than those obtained with the ammonium or alkali metal chlorates, perchlorates, or nitrates, it is generally preferred to employ the alkaline earth metal nitrate oxidizer in admixture with one of the foregoing oxidizers.
- the halogen-free alkali metal salts may be any compound which reacts with the chlorine in the polyvinyl chloride and in any ammonium perchlorate used as primary oxidizer to form a non-toxic alkali metal salt.
- the alkali metal moiety can be, for example, Na, K, or Li.
- the alkali metal salt is also an oxidizer, thereby supplementing the gasforming oxidizing action of the primary oxidizer and contributing to the desired carbon dioxide and Water stoichiometry.
- Preferred halogen-free alkali metal oxidizers are the nitrates, e.g.
- alkali metal oxidizers include, for example, the alkali metal nitrites.
- Alkali metal salts which do not react as oxidizers may also be used. Preferably they contribute non-toxic, gaseous decomposition products which increase total gas production, decrease concentration of solid combustion products and act as coolants.
- suitable non-oxidizer salts include, but are not limited to, alkali metal oxalates, e.g. Na C O K O O carbonates and bicarbonates, e.g. K CO Na CO Nat-K10 azides, e.g. KN and the like.
- the total amount of oxidizer, in cluding primary oxidizer and halogen-free alkali metal oxidizer, should be at least suflicient to oxidizer all available carbon and hydrogen present in the composition to carbon dioxide and water.
- primary oxidizer may be employed and is, in fact, advantageous since its endothermic decomposition contributes to gas formation in the form of free oxygen and to reducing flame temperature, thereby functioning as a coolant.
- the amount of halogen-free alkali salt should be in amount at least suflicient to transform all available halogen to the alkali metal halide.
- available halogen is meant halogen not already combined with alkali metal as in the case of an alkali metal chlorate or perchlorate.
- the halogen-free alkali metal salt should not be included in substantial excess.
- the total amount of available alkali metal should not exceed available halogen by more than about 10 mol percent.
- stoichiomet'ric proportions of alkali metal and halogen are preferred, in some cases a small excess of alkali metal may be desirable to ensure complete freedom from HCl or C1 formation since these are considerably more toxic than small amounts of alkali metal oxide or hydroxide.
- othzr conventional additives may be incorporated into the gasgenerating compositions. They include, for example, stabilizers for the polyvinyl chloride, burning rate catalysts, coolants and the like.
- the plasticized polyvinyl chloride resin binder gasgenerating compositions are very stable and can be stored at temperatures as low as 50 F. and as high as 220 F. without adverse degradation for periods as long as five to ten years. Ignition temperatures are very high and sensitivity to impact, friction and electrostatic charge is very low so that the gas generators containing the compositions can be stored safely in con-fined spaces in close proximity to human beings. Other advantageous properties include high densities thereby reducing chamber size requirements, easy ignition, high burning rates, and inexpensive raw material requirements.
- Pressure vessel 1 contains a gas, such as air, under pressure.
- Gas generator 2 seated within the pressure vessel comprises a combustion chamber 3 equipped with a restricted aperture or nozzle 4 and containing a shaped gas-generating grain 5 of composition as aforedescribed. Electrically actuated squib 6 is employed to ignite the gas-generating grain.
- the gas generator is sealed with rupturable cap 7.
- the pressure chamber is provided with outlet means 8 sealed with rupturable disc 9 and connected by conduit 10 to inflatable device 11.
- Safety valve 12 is designed to preclude development of excessive pressures in the pressure vessel.
- the gas-generating grain is ignited.
- seal 7 ruptures and the hot high pressure combustion gases generated by the burning grain vent into the pressurized gas, e.g. air, in the pressure chamber.
- the air pressure is considerably increased both by the heat and added volume of the combustion gases.
- Seal 9 ruptures and the high pressure mixture of air and combustion gases pour into and inflate the inflatable device.
- the compressed air acts as a heat sink to reduce the temperature of hot combustion gases to a safe level.
- the pressure chamber contaning compressed air or other gas can be dispensed with and the inflatable device connected directly to the gas generator. Temperature reduction of the hot combustion gases can be accomplished by adding coolant compounds to the gas-generating compositions and by storing a vaporizable liquid, such as water, in the inflatable device.
- the gas-generating compositions described in the following examples were processed into shaped grains by mixing the plastisol grade polyvinyl chloride with the plasticizers, primary oxidizer, halogen-free alkali metal salt, and other additives, such as stabilizers and burning rate catalyst in a conventional mixer.
- the viscous but still fluid mixtures were then either poured into molds and heated to the fusion temperature of the polyvinyl chloride in the plasticizer or solution-cured by continuous passage through a heat-jacketed worm extruder barrel, after which the extruding column was passed through a shaping die, cooled, and cut to desired lengths.
- Friction sensitivity Esso Screw Friction Test (two screwloaded flat plates with propellant and No. carborundum grit between)): 300 in./1b.
- Card-gap test Tetryl pellet placed against propellant and detonatedno propellant detonation in 4 tests: zero cards
- EXAMPLE 2 Composition: Percent by weight Polyvinyl chloride 5.616 Dioctyl adipate 8.22.7 Stabilizer 0.158 Carbon black 0.039 K010 55.820 Sr(NO 21.053 KNO 9.087
- EXAMPLE 3 Composition: Percent by weight Polyvinyl chloride 6.318 Dioctyl adipate 9.477 Carbon black 0.048 Stabilizer 0.196 Ammonium perchlorate 42.598 NaNO 39.407 F3203 Burning rate at 3000 p.s.i.a., 70 R: 1.6 in./sec. Burning rate pressure exponent n: 0.63
- EXAMPLE 4 Composition: Percent by weight Polyvinyl chloride 4.513 Dibutyl sebacate 6.770 Stabilizer 0.135 Carbon black 0.034 Ammonium perchlorate 29.032 NaNO 27.139 Sr(N-O 31.029 Fe O 1.348
- a non-toxic, non-corrosive, and non-flammable combustible gas-generating composition for use in inflating an inflatable device comprising:
- inorganic oxidizer salt selected from the group consisting of ammonium perchlorate, alkali metal chlorates and perchlorates, alkaline earth metal nitrates and mixtures thereof,
- composition containing total oxidizer in amount 9.
- the inorganic at least suflicient to convert all available carbon to oxidizer salt is ammonium perchlorate. carbon dioxide and all available hydrogen to water, 5
- composition containing available combined alkali References Cited metal in amount at least sufiicient to convert all avail- UNITED STATES PATENTS able halogen to alkali metal halide up to a maximum 3,155,749 11/1964 'Rossen et al 14976 X 82 22;: 10 ml Percent excess the avallable 10 3,180,373 4/1965 Hebenrasi 141-4 2.
- the composition of claim 1 wherein the halogen- 3107186 10/1963 Scurlock et 149-19 2,904,420 9/ 1959 Holker 1496l X free alkali metal salt is an alkali metal nitrate. 3 066 479 12/1962 K h 149 35 X 3.
- composition of claim 2 wherein the alkali metal 0c nitrate is sodium nitrate or potassium nitrate 3362859 1/1968 Sutton et a1 149*19 3,373,062 3/1968 Morris 14919 X 4.
- composition of claim 1 wherein the inorganic X- oxidizer salt is ammonium perchlorate. 149 35, 61 76 AB
Abstract
AN INFLATION SYSTEM COMPRISING A GAS GENERATOR AND AN INFLATABLE DEVICE WHEREIN THE GAS GENERATOR CONTAINS A GASGENERATING COMPOSITION WHICH PRODUCES COMBUSTION PRODUCTS FREE FROM CORROSIVE, TOXIC, OR INFLAMMABLE COMPONENTS. THE GAS-GENERATING COMPOSITION COMPRISES PLASTICIZER POLYVINYL CHLORIDE FUEL BINDER AND A MIXTURE OF INORGANIC OXIDIZING SALT AND HALOGEN-FREE ALKALI METAL SALT IN A STOICHIOMETRY SUFFICIENT AT THE LEAST TO TRANSFORM ALL CARBON, HYDROGEN, AND HALOGEN IN THE COMPOSITION TO CARBON DIOXIDE, WATER AND ALKALI METAL HALIDE.
Description
March 27, 1973 5, SCHEFFEE 3,723,295
GAS GENERATING COMPOSITION WITH POLYVINYL CHLORIDE BINDER Filed May 7, 1971 Q INFLATABLE DEV/CE D INVENTOR 905527 6. SCHEFFEE nited States atent 3,723,205 Patented Mar. 27, 1973 ABSTRACT OF THE DISCLOSURE An inflation system comprising a gas generator and an inflatable device wherein the gas generator contains a gasgenerating composition which produces combustion products free from corrosive, toxic, or inflammable components. The gas-generating composition comprises plasticized polyvinyl chloride fuel binder and a mixture of inorganic oxidizing salt and halogen-free alkali metal salt in a stoichiometry suflicient at the least to transform all car- 'bon, hydrogen, and halogen in the composition to carbon dioxide, water and alkali metal halide.
BACKGROUND OF THE INVENTION Many devices, such as a protective passive restraint or crash bag used in automobiles, escape slide chutes, life rafts, and the like, are normally stored deflated and are inflated with gas at the time of need. Such devices are generally both stored and used in close proximity to human beings and, therefore, must be designed with a high safety factor effective at all times.
Inflation is generally accomplished by means of a gas, such as air, nitrogen, CO helium, and the like stored under pressure and further pressurized and supplemented at the time of use by the addition of high temperature combustion gas products produced by the burning of a gas-generating composition. In some cases the inflation gases are solely produced by the gas-generating compositions.
It is obviously very important that the gas-generating composition be capable of safe and reliable storage without decomposition or ignition at all temperatures likely to be encountered in the vehicle or other storage environment as, for example, up to temperatures as high as about 220 F. It is also important that substantially all of the combustion products generated during use be non-toxic, non-corrosive, and non-inflammable, particularly where the device is used in a closed environment such as an automobile.
Gas-generating compositions employed hitherto have not met all of the above qualifications. Examples of compositions which have been used include black powder and plasticized nitrocellulose (double base) propellant compositions. The double base propellants are unstable at high ambient temperatures. Storage and use is generally restricted to temperatures below 140 F. Both black powder and double base propellant generate toxic and/ or inflammable gases. Double base propellants produce, in addition to carbon dioxide and Water, carbon monoxide and hydrogen, a mixture which is both toxic and inflammable. Black powder produces carbon monoxide in toxic concentrations as well as being relatively inefficient in volume of gas generated. The use of conventional composite propellants has also been suggested. Such pro pellants, however, have reactive components and stoichi ometries which result in toxic, corrosive, or flammable combustion products, which, in addition to carbon monoxide and hydrogen, may include hydrogen chloride, alkali metal oxides or hydroxides, nitrogen oxides, and the like.
For the applications contemplated herein, it is also im portant to have gas-generating compositions which generate large volumes of gas, which can be stored without adverse degradation for periods as long as 5 to 10 years and which can be mass produced at low cost.
The gas-generating compositions employed in the gasgenerator of the inflation system of this invention have important advantages which result in significantly improved inflation systems. These advantages include inter alia:
(l) Storageability at ambient temperatures up to 220 F.
for as long as five to ten years.
(2) High autoignition temperature, very low impact sensitivity, and very low friction sensitivity.
(3) Combustion products free from toxic, corrosive, and
flammable components.
(4) High volumetric gas-generating capability per unit Weight of gas-generating composition.
(5) Capability for safe, reliable, low-cost, mass production.
SUMMARY OF THE INVENTION The invention is an improvement in conventional inflation systems comprising a gas generator and an inflatable device. The inflatable device may be a bag designed to act as a passive restraint to protect an automobile driver or passenger in case of collision, an aircraft escape chute, a life raft, and the like. The gas generator contains a gas-generating composition capable of producing gaseous combustion products which can be used to pressurize and supplement a primary inflation gas source, such as air, nitrogen, carbon dioxide, helium and the like, maintained under pressure in a separate storage chamber or to inflate the inflatable device directly without an additional gas supply.
The improvement comprises gas-generating compositions which consist essentially of plasticized polyvinyl chloride fuel binder containing dispersed therein an inorganic oxidizer selected from the group consisting of ammonium perchlorate, alkali metal chlorate or perchlorate, alkaline earth metal nitrate, and mixtures thereof, hereinafter called primary oxidizer, and halogen-free alkali metal salt reactive with the combined chlorine in the polyvinyl chloride (and ammonium perchlorate if used as primary oxidizer) to form alkali metal chloride. The halogen-free alkali metal salt may also be an oxidizer in Whole or in part. Total oxidizer and halogen-free alkali metal salt are present in amount at least sufficient to oxidize all available carbon to carbon dioxide and all available hydrogen to Water and to convert all available combined chlorine to the alkali metal halide. Oxidizer and/ or alkali metal salt in excess of these stoichiometric requirements may be employed.
The invention also comprises a method for inflating inflatable devices with gaseous combustion products which are non-toxic, non-corrosive, and non-flammable so that the devices can be safely employed in close proximity to human beings, particularly in confined spaces. The method comprises burning the gas-generating composition aforedescribed and injecting the gaseous combustion products into the inflatable device either solely or as a pressurizing supplement to a separate pressurized gas, such as air, nitrogen, carbon dioxide, or helium.
DRAWINGS The figure is a longitudinal sectional view partly in elevation of an inflation system utilizing a gas generator and an inflation device in accordance with this invention.
DETAILED DESCRIPTION As aforedescribed, the improvement in the inflation system resides in loading the gas generator portion of the inflation system with a gas-generating composition comprising a plasticized polyvinyl chloride fuel binder containing dispersed therein an inorganic oxidizer salt selected from the group consisting of ammonium perchlorate, alkali metal chlorate or perchlorate, alkaline earth metal nitrates, and mixtures thereof, and a halogen-free, alkali metal salt, total oxidizer and alkali metal salt being present in amount at least sufficient to oxidize all avalaible carbon and hydrogen in the composition to carbon dioxide and water and to convert all available combined chlorine to the alkali metal halide.
The term polyvinyl chloride as employed herein includes both the homopolymer and a copolymer containing up to about of a copolymerized component, such as vinyl acetate or vinylidene chloride. Preferably the polyvinyl chloride is essentially fully polymerized and employed in the form of plastisol-grade spheroidal particles.
Any organic liquid plasticizer compatible with polyvinyl chloride may be employed. Such plasticizers are wellknown in the art. Preferably, the plasticizer is of the type suitable for fiuid plastisol formation, as, for example, alkyl and alkoxyalkyl adipates, sebacates, and phthalates, e.g. dibutyl and dioctyl sebacate, dibutyl, dioctyl, and dimethoxyethyl phtha ate, dibutyl dioctyl and di(3,5,5trimethylhexyl) adipate; glycol esters of higher fatty acids and the like. The plastisol-forming lasticizers are high boiling solvents for the polyvinyl chloride which form fluid suspensions with the resin particles at ordinary temperatures because of the low solubility at such temperatures and dissolve the resin at elevated temperatures to form a solid gel.
The preferred ratio of polyvinyl chloride to plasticizer is generally from about 2 parts resin to 3 parts plasticizer to about 3 parts resin to about 2 parts lasticizer for desirable physical properties of the cured gasgenerating grains, such as tensile strength and minimum cold flow. In view of the high solids loadings generally required by the inflation system applications, the higher ratios of plasticizer to resin are desirable in order to maintain processability of the mix. For some inflation applications, physical property requirements are less exacting and the ratio of plasticizer to resin may be increased to as much as 2.5 to 1 while maintaining adequate physical properties of the solid gas-generating grain for the application.
The fluid polyvinyl chloride-plasticizer slurries can accommodate up to as much as 90% of added solids if, as is well-known in the art, particle sizes of the added solids are properly selected and distributed, without loss of adequate fluidity to permit casting and curing without application of high pressures.
The polyvinyl chloride-plasticizer slurry loaded with oxidizer and such other solids as may be required is cured simply by heating to the solution temperature of the polyvinyl chloride in the plasticizer, generally about 160 to 175 C. Since the polyvinyl chloride is fully polymerized, no potentially variable cure reaction occurs and the resulting cured gas-generating grains are highly reproducible and reliable. Polyvinyl chloride plastisol gas-generating propellants and process for making them are described in U.S. Pat. 2,966,403.
The loaded polyvinyl chloride-plasticizer plastisol slurries are particularly amenable to curing and casting by extrusion as disclosed in U.S. Pat. 3,155,749. Briefly, the loaded slurry is introduced into an elongated extruder barrel through which it is advanced by a rotating worm screW with simultaneous generation of frictional heat, which together with heat supplied by means of a heating jacket provides the elevated temperature required for the solution cure. The mix is fully cured when it completes its passage through the extruder barrel though it is still in a sufliciently hot, soft state to be shaped by passage through a die after which the shaped extruding column is cooled and cut into grains of the desired length. The extrusion process is continuous and provides rapid, low-cost mass production of the gas-generating grains.
Use of the specified primary inorganic oxidizer salts in combination with the halogen-free alkali metal salts in the amounts required by the specified stoichiometry provides maximized non-toxic, non-corrosive, non-flammable gas production and neutralization of the chlorine component in the polyvinyl chloride binder in the form of a non-toxic alkali metal chloride product. The primary oxidizers, in addition to oxygen, produce per se or by reaction with the halogen-free alkali metal salt additive, only non-toxic, non-corrosive, and non-flammable combustion products. The halogen-free alkali metal salt additive prevents formation of corrosive HCl or chlorine.
The alkali metal, e.g. Na, K, Li, chlorates and perchlorates form non-toxic alkali metal chlorides, with the remainder of the oxidizer salt molecules providing oxygen for combustion of the fuel. Of these, potassium perchlorate is generally preferred. Ammonium perchlorate is highly useful as an oxidizer because it increases gas production in the form of nitrogen and water and reduces the percentage of solid products. It also provides somewhat lower flame temperatures than the corresponding alkali metal salts. The HCl produced by ammonium perchlorate as a decomposition product is corrosive and must be neutralized by transformation into the alkali metal chloride. Thus, sufficient halogen-free alkali metal salt must be incorporated for this purpose as well as for the neutralization of the HCl decomposition product of the polyvinyl chloride resin binder.
The alkaline earth metal nitrate oxidizer salts, such as Ba(NO or Sr(NO decompose to form highly stable non-toxic oxides as combustion products and thus can be safely and efficiently used as oxidizers in gas-generating compositions. Since burning rates obtained with these oxidizers are generally lower than those obtained with the ammonium or alkali metal chlorates, perchlorates, or nitrates, it is generally preferred to employ the alkaline earth metal nitrate oxidizer in admixture with one of the foregoing oxidizers.
The halogen-free alkali metal salts, as aforementioned, may be any compound which reacts with the chlorine in the polyvinyl chloride and in any ammonium perchlorate used as primary oxidizer to form a non-toxic alkali metal salt. The alkali metal moiety can be, for example, Na, K, or Li. Preferably, though not essentially, the alkali metal salt is also an oxidizer, thereby supplementing the gasforming oxidizing action of the primary oxidizer and contributing to the desired carbon dioxide and Water stoichiometry. Preferred halogen-free alkali metal oxidizers are the nitrates, e.g. NaNO and KNO since they have the additional advantage of forming nitrogen gas as a combustion product and of conferring good combustion properties, such as desired burning rate and pressure exponent. Other alkali metal oxidizers include, for example, the alkali metal nitrites.
Alkali metal salts which do not react as oxidizers may also be used. Preferably they contribute non-toxic, gaseous decomposition products which increase total gas production, decrease concentration of solid combustion products and act as coolants. Examples of suitable non-oxidizer salts include, but are not limited to, alkali metal oxalates, e.g. Na C O K O O carbonates and bicarbonates, e.g. K CO Na CO Nat-K10 azides, e.g. KN and the like.
As aforementioned the total amount of oxidizer, in cluding primary oxidizer and halogen-free alkali metal oxidizer, should be at least suflicient to oxidizer all available carbon and hydrogen present in the composition to carbon dioxide and water. Excess primary oxidizer may be employed and is, in fact, advantageous since its endothermic decomposition contributes to gas formation in the form of free oxygen and to reducing flame temperature, thereby functioning as a coolant. The amount of halogen-free alkali salt should be in amount at least suflicient to transform all available halogen to the alkali metal halide. By available halogen is meant halogen not already combined with alkali metal as in the case of an alkali metal chlorate or perchlorate. The halogen-free alkali metal salt should not be included in substantial excess. The total amount of available alkali metal should not exceed available halogen by more than about 10 mol percent. Although stoichiomet'ric proportions of alkali metal and halogen are preferred, in some cases a small excess of alkali metal may be desirable to ensure complete freedom from HCl or C1 formation since these are considerably more toxic than small amounts of alkali metal oxide or hydroxide.
The particular amounts and relative proportions of primary oxidizer and halogen-free alkali metal salt will obviously vary with the particular binder concentration, the particular plasticizer, and the particular primary oxidizer and halogen-free alkali metal salt employed. They can, however, be readily calculated in accordance with well-known procedures by anyone skilled in the art.
In addition to the components aforedescrbed, othzr conventional additives may be incorporated into the gasgenerating compositions. They include, for example, stabilizers for the polyvinyl chloride, burning rate catalysts, coolants and the like.
The plasticized polyvinyl chloride resin binder gasgenerating compositions are very stable and can be stored at temperatures as low as 50 F. and as high as 220 F. without adverse degradation for periods as long as five to ten years. Ignition temperatures are very high and sensitivity to impact, friction and electrostatic charge is very low so that the gas generators containing the compositions can be stored safely in con-fined spaces in close proximity to human beings. Other advantageous properties include high densities thereby reducing chamber size requirements, easy ignition, high burning rates, and inexpensive raw material requirements.
The figure shows schematically, an inflation system utilizing the improvement of this invention. Pressure vessel 1 contains a gas, such as air, under pressure. Gas generator 2 seated within the pressure vessel comprises a combustion chamber 3 equipped with a restricted aperture or nozzle 4 and containing a shaped gas-generating grain 5 of composition as aforedescribed. Electrically actuated squib 6 is employed to ignite the gas-generating grain. The gas generator is sealed with rupturable cap 7. The pressure chamber is provided with outlet means 8 sealed with rupturable disc 9 and connected by conduit 10 to inflatable device 11. Safety valve 12 is designed to preclude development of excessive pressures in the pressure vessel.
In operation, the gas-generating grain is ignited. When adequate pressure has developed within the gas-generator, seal 7 ruptures and the hot high pressure combustion gases generated by the burning grain vent into the pressurized gas, e.g. air, in the pressure chamber. The air pressure is considerably increased both by the heat and added volume of the combustion gases. Seal 9 ruptures and the high pressure mixture of air and combustion gases pour into and inflate the inflatable device. The compressed air acts as a heat sink to reduce the temperature of hot combustion gases to a safe level.
In some applications, the pressure chamber contaning compressed air or other gas can be dispensed with and the inflatable device connected directly to the gas generator. Temperature reduction of the hot combustion gases can be accomplished by adding coolant compounds to the gas-generating compositions and by storing a vaporizable liquid, such as water, in the inflatable device.
The gas-generating compositions described in the following examples were processed into shaped grains by mixing the plastisol grade polyvinyl chloride with the plasticizers, primary oxidizer, halogen-free alkali metal salt, and other additives, such as stabilizers and burning rate catalyst in a conventional mixer. The viscous but still fluid mixtures were then either poured into molds and heated to the fusion temperature of the polyvinyl chloride in the plasticizer or solution-cured by continuous passage through a heat-jacketed worm extruder barrel, after which the extruding column was passed through a shaping die, cooled, and cut to desired lengths.
Ballistic properties:
Burning rate at 500 p.s.i.a., 70 F.: 0.60 in./sec.
Burning rate at 5000 p.s.i.a., 70 F.: 0.60 in./sec.
Burning rate pressure exponent n: 0.67 Safety data:
Autoignition temperature: 680 F. Impact sensitivity (12 tests negative with 6 kg. at
50 cm.): 300 -kg.-cm.
Friction sensitivity (Esso Screw Friction Test (two screwloaded flat plates with propellant and No. carborundum grit between)): 300 in./1b.
Card-gap test (Tetryl pellet placed against propellant and detonatedno propellant detonation in 4 tests): zero cards EXAMPLE 2 Composition: Percent by weight Polyvinyl chloride 5.616 Dioctyl adipate 8.22.7 Stabilizer 0.158 Carbon black 0.039 K010 55.820 Sr(NO 21.053 KNO 9.087
Burning rate at 1000 p.s.i.a., 70 F.: 0.89 in./sec. Burning rate at 4000 p.s.i.a., 70 F.: 2.51 in./sec. Burning rate pressure exponent n: 0.75
EXAMPLE 3 Composition: Percent by weight Polyvinyl chloride 6.318 Dioctyl adipate 9.477 Carbon black 0.048 Stabilizer 0.196 Ammonium perchlorate 42.598 NaNO 39.407 F3203 Burning rate at 3000 p.s.i.a., 70 R: 1.6 in./sec. Burning rate pressure exponent n: 0.63
EXAMPLE 4 Composition: Percent by weight Polyvinyl chloride 4.513 Dibutyl sebacate 6.770 Stabilizer 0.135 Carbon black 0.034 Ammonium perchlorate 29.032 NaNO 27.139 Sr(N-O 31.029 Fe O 1.348
Burning rate at 3000 p.s.i.a., 70 F.: 1.4 in./sec. Burning rate pressure exponent n: 0.70
Although this invention has been" described with reference to illustrative embodiments thereof, it will be apparent to those skilled in the art that the principles of this invention can be embodied in other forms but within the scope of the claims.
I claim:
1. A non-toxic, non-corrosive, and non-flammable combustible gas-generating composition for use in inflating an inflatable device comprising:
plasticized polyvinyl chloride fuel binder,
inorganic oxidizer salt selected from the group consisting of ammonium perchlorate, alkali metal chlorates and perchlorates, alkaline earth metal nitrates and mixtures thereof,
halogen-free alkali metal salt reactive with available 8. The composition of claim 2 wherein the inorganic halogen to form alkali metal halide, oxidizer salt is ammonium perchlorate.
said composition containing total oxidizer in amount 9. The composition of claim 3 wherein the inorganic at least suflicient to convert all available carbon to oxidizer salt is ammonium perchlorate. carbon dioxide and all available hydrogen to water, 5
said composition containing available combined alkali References Cited metal in amount at least sufiicient to convert all avail- UNITED STATES PATENTS able halogen to alkali metal halide up to a maximum 3,155,749 11/1964 'Rossen et al 14976 X 82 22;: 10 ml Percent excess the avallable 10 3,180,373 4/1965 Hebenstreit 141-4 2. The composition of claim 1 wherein the halogen- 3107186 10/1963 Scurlock et 149-19 2,904,420 9/ 1959 Holker 1496l X free alkali metal salt is an alkali metal nitrate. 3 066 479 12/1962 K h 149 35 X 3. The composition of claim 2 wherein the alkali metal 0c nitrate is sodium nitrate or potassium nitrate 3362859 1/1968 Sutton et a1 149*19 3,373,062 3/1968 Morris 14919 X 4. The composition of claim 1 wherein the inorganic 15 oxidizer salt is potassium perchlorate.
5. The composition of claim 2 wherein the inorganic CARL D QUARFORTH Primar Examiner oxidizer salt is potassium perchlorate. y
3,692,495 9/1972 Schneiter et a1. 280-150 AB 6. The composition of claim 3 wherein the inorganic E. A. MILLER, Assistant Examiner oxidizer salt is potassium perchlorate. 2O
7. The composition of claim 1 wherein the inorganic X- oxidizer salt is ammonium perchlorate. 149 35, 61 76 AB
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14131171A | 1971-05-07 | 1971-05-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3723205A true US3723205A (en) | 1973-03-27 |
Family
ID=22495144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00141311A Expired - Lifetime US3723205A (en) | 1971-05-07 | 1971-05-07 | Gas generating composition with polyvinyl chloride binder |
Country Status (7)
Country | Link |
---|---|
US (1) | US3723205A (en) |
BE (1) | BE782988A (en) |
CA (1) | CA972574A (en) |
DE (1) | DE2222506B2 (en) |
FR (1) | FR2137619B1 (en) |
GB (1) | GB1388627A (en) |
IT (1) | IT957743B (en) |
Cited By (74)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3845970A (en) * | 1971-10-09 | 1974-11-05 | Bayern Chemie Gmbh Flugchemie | Shock absorption system for a motor vehicle |
US3853334A (en) * | 1972-12-11 | 1974-12-10 | Gen Motors Corp | Occupant restraint system |
US3865660A (en) * | 1973-03-12 | 1975-02-11 | Thiokol Chemical Corp | Non-toxic, non-corrosive, odorless gas generating composition |
USRE28624E (en) * | 1971-11-03 | 1975-11-25 | Argon compressed gas supply | |
US3945338A (en) * | 1974-11-13 | 1976-03-23 | Affonso Henriques Correa | Location indicator for lost aircraft |
US3977924A (en) * | 1974-04-01 | 1976-08-31 | The United States Of America As Represented By The Secretary Of The Navy | Coolant additives for nitrogen generating solid propellants |
US3985076A (en) * | 1973-11-19 | 1976-10-12 | Thiokol Corporation | Gas generator |
US3986908A (en) * | 1972-07-05 | 1976-10-19 | Societe Nationale Des Poudres Et Explosifs | Composite propellants with a cellulose acetate binder |
US4066415A (en) * | 1975-02-03 | 1978-01-03 | Nippon Oil And Fats Co., Ltd. | Gas generator for inflatable life raft |
US4152891A (en) * | 1977-10-11 | 1979-05-08 | Allied Chemical Corporation | Pyrotechnic composition and method of inflating an inflatable automobile safety restraint |
US4203786A (en) * | 1978-06-08 | 1980-05-20 | Allied Chemical Corporation | Polyethylene binder for pyrotechnic composition |
US4244758A (en) * | 1978-05-15 | 1981-01-13 | Allied Chemical Corporation | Ignition enhancer coating compositions for azide propellant |
US4981534A (en) * | 1990-03-07 | 1991-01-01 | Atlantic Research Corporation | Occupant restraint system and composition useful therein |
US5015309A (en) * | 1989-05-04 | 1991-05-14 | Morton International, Inc. | Gas generant compositions containing salts of 5-nitrobarbituric acid, salts of nitroorotic acid, or 5-nitrouracil |
US5022674A (en) * | 1990-04-05 | 1991-06-11 | Bendix Atlantic Inflator Company | Dual pyrotechnic hybrid inflator |
US5031932A (en) * | 1990-04-05 | 1991-07-16 | Frantom Richard L | Single pyrotechnic hybrid inflator |
US5076607A (en) * | 1990-11-27 | 1991-12-31 | Bendix Atlantic Inflator Co. | Hybrid inflator |
US5131680A (en) * | 1991-03-19 | 1992-07-21 | Trw Vehicle Safety Systems Inc. | Inflator assembly |
US5184845A (en) * | 1988-05-20 | 1993-02-09 | Nissan Motor Co., Ltd. | Air-bag system |
DE4231556A1 (en) * | 1991-09-20 | 1993-04-01 | Trw Vehicle Safety Systems | inflator |
US5199740A (en) * | 1991-06-10 | 1993-04-06 | Bendix Atlantic Inflator Co. | Hybrid inflator for air bag |
DE4236617A1 (en) * | 1991-11-01 | 1993-05-06 | Trw Vehicle Safety Systems Inc., Lyndhurst, Ohio, Us | |
US5213362A (en) * | 1991-03-19 | 1993-05-25 | Trw Vehicle Safety Systems Inc. | Stab igniter assembly |
DE4242793A1 (en) * | 1991-12-17 | 1993-07-01 | Trw Vehicle Safety Systems | |
US5226667A (en) * | 1991-03-19 | 1993-07-13 | Trw Vehicle Safety Systems Inc. | Percussion igniter assembly |
US5288104A (en) * | 1992-11-09 | 1994-02-22 | Johnny Chen | Buffering safe device in vehicles |
US5324075A (en) * | 1993-02-02 | 1994-06-28 | Trw Inc. | Gas generator for vehicle occupant restraint |
US5348344A (en) * | 1991-09-18 | 1994-09-20 | Trw Vehicle Safety Systems Inc. | Apparatus for inflating a vehicle occupant restraint using a mixture of gases |
US5351989A (en) * | 1992-11-30 | 1994-10-04 | Trw Vehicle Safety Systems Inc. | Inflator assembly |
US5360232A (en) * | 1993-09-14 | 1994-11-01 | Morton International, Inc. | Filtration in hybrid inflators |
US5401340A (en) * | 1993-08-10 | 1995-03-28 | Thiokol Corporation | Borohydride fuels in gas generant compositions |
US5409259A (en) * | 1992-10-09 | 1995-04-25 | Morton International, Inc. | Gas generator for vehicle occupant restraint system |
EP0655429A1 (en) * | 1993-11-17 | 1995-05-31 | Morton International, Inc. | Improved PVC-based gas generant for hybrid gas generators |
US5429691A (en) * | 1993-08-10 | 1995-07-04 | Thiokol Corporation | Thermite compositions for use as gas generants comprising basic metal carbonates and/or basic metal nitrates |
US5439537A (en) * | 1993-08-10 | 1995-08-08 | Thiokol Corporation | Thermite compositions for use as gas generants |
US5443286A (en) * | 1992-10-09 | 1995-08-22 | Morton International, Inc. | Gas generator for vehicle occupant restraint system |
US5486248A (en) * | 1994-05-31 | 1996-01-23 | Morton International, Inc. | Extrudable gas generant for hybrid air bag inflation system |
US5518268A (en) * | 1995-06-19 | 1996-05-21 | Morton International, Inc. | Flow-through heat-enhanced hybrid inflator |
EP0718257A1 (en) | 1994-12-22 | 1996-06-26 | Societe Nationale Des Poudres Et Explosifs | Method of continuous fabrication of silicone-bonded pyrotechnic charges and composition for use in such a fabrication method |
US5538278A (en) * | 1994-06-14 | 1996-07-23 | Ad Astram Enterprises, Inc. | Ignition train apparatus for hybrid airbag inflators |
US5551725A (en) * | 1995-03-10 | 1996-09-03 | Ludwig; Christopher P. | Vehicle airbag inflator and related method |
US5551724A (en) * | 1993-09-14 | 1996-09-03 | Morton International, Inc. | Treatment of inflatable restraint system inflator particulate-containing gas with expanded metal |
US5586783A (en) * | 1994-02-24 | 1996-12-24 | Temic Bayern-Chemie Airbag Gmbh | Hybrid gas generator for filling a gas bag |
US5592812A (en) * | 1994-01-19 | 1997-01-14 | Thiokol Corporation | Metal complexes for use as gas generants |
US5615912A (en) * | 1995-10-05 | 1997-04-01 | Trw Vehicle Safety Systems Inc. | Inflator for air bag |
US5622381A (en) * | 1996-06-07 | 1997-04-22 | Morton International, Inc. | Integral projectile squid for air bag inflators |
EP0779260A2 (en) | 1995-12-13 | 1997-06-18 | Morton International, Inc. | Fuel compositions for use in hybrid inflators containing stored oxidizing gas |
WO1997026159A1 (en) * | 1996-01-20 | 1997-07-24 | Trw Airbag Systems Gmbh & Co. Kg | Gas generator for producing a gas mixture |
US5660412A (en) * | 1994-12-12 | 1997-08-26 | Bendix-Atlantic Inflator Company | Hybrid inflator |
WO1998008715A1 (en) * | 1995-06-13 | 1998-03-05 | Atlantic Research Corporation | Hybrid inflator for inflating air bags |
US5725699A (en) * | 1994-01-19 | 1998-03-10 | Thiokol Corporation | Metal complexes for use as gas generants |
US5847311A (en) * | 1996-10-22 | 1998-12-08 | Trw Vehicle Safety Systems Inc. | Hybrid inflator with crystalline and amorphous block copolymer |
US5913537A (en) * | 1995-06-09 | 1999-06-22 | Trw Vehicle Safety Systems Inc. | Hybrid inflator including non-metallic nitrogen containing ignitable material |
US6068290A (en) * | 1997-12-23 | 2000-05-30 | Trw Vehicle Safety System Inc. | Inflator structure |
US6093269A (en) * | 1997-12-18 | 2000-07-25 | Atlantic Research Corporation | Pyrotechnic gas generant composition including high oxygen balance fuel |
US6142511A (en) * | 1995-12-22 | 2000-11-07 | Universal Propulsion Company | Inflatable passenger restraint and inflator therefor |
US6195996B1 (en) | 1999-12-21 | 2001-03-06 | Trw Inc. | Body of gas generating material for a vehicle occupant restraint |
US6206418B1 (en) | 1996-08-09 | 2001-03-27 | S.N.C. Livbag | Hybrid generator with internal gas injection |
US6273462B1 (en) | 1995-09-22 | 2001-08-14 | Trw Vehicle Safety Systems Inc. | Air bag inflator |
US6418870B1 (en) | 2000-05-31 | 2002-07-16 | Systems Engineering Associates Corporation | Torpedo launch mechanism and method |
WO2002057703A1 (en) * | 2001-01-19 | 2002-07-25 | Bofors Bepab Ab | A method for controlling the burning pressure in a preinflator, preinflator per se and hybrid gas generator incorporating such a preinflator |
USRE37843E1 (en) | 1991-09-18 | 2002-09-17 | Trw Vehicle Safety Systems Inc. | Apparatus for inflating a vehicle occupant restraint using a mixture of gases |
US6510875B2 (en) * | 1999-07-14 | 2003-01-28 | Pennzoil | Inflating device and method of use |
US6533878B1 (en) | 1997-12-12 | 2003-03-18 | Societe Nationale Des Poudres Et Explosifs | Pyrotechnic compositions generating non-toxic gases based on ammonium perchlorate |
US6557474B1 (en) | 2000-08-30 | 2003-05-06 | Glasseal Products | Initiator header subassembly for inflation devices |
US6824626B2 (en) | 2000-12-22 | 2004-11-30 | Snpe | Gas-generating pyrotechnic compositions with a binder and continuous manufacturing process |
US20050040367A1 (en) * | 2001-12-11 | 2005-02-24 | Baerlocher Gmbh | Stabilizer composition, production and use thereof |
US6860951B2 (en) * | 1995-03-10 | 2005-03-01 | Talley Defense Systems, Inc. | Gas generating compositions |
US20050067074A1 (en) * | 1994-01-19 | 2005-03-31 | Hinshaw Jerald C. | Metal complexes for use as gas generants |
US20050146123A1 (en) * | 2003-12-17 | 2005-07-07 | Trw Airbag Systems Gmbh | Gas generator |
US6969435B1 (en) | 1994-01-19 | 2005-11-29 | Alliant Techsystems Inc. | Metal complexes for use as gas generants |
US20060055160A1 (en) * | 2004-09-16 | 2006-03-16 | Trw Vehicle Safety Systems Inc. | Inflator having a fluid |
US20060290108A1 (en) * | 2005-06-23 | 2006-12-28 | Trw Vehicle Safety Systems Inc. | Heated gas inflator |
US20210147314A1 (en) * | 2019-11-15 | 2021-05-20 | Goodrich Corporation | Inflation systems for evacuation slides and life rafts |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2640261B1 (en) * | 1979-08-14 | 1993-12-10 | Poudres Explosifs Ste Nale | SELF-PYROLYZABLE COMPOSITION FOR AEROBIC PROPULSION OF WHICH THE OXIDANT IS AN EXPLOSIVE |
GB2221747B (en) * | 1988-08-09 | 1993-02-17 | Graviner Ltd Kidde | Apparatus and methods for producing motive power |
US5301979A (en) * | 1993-07-23 | 1994-04-12 | Morton International, Inc. | Piston driven cold gas air bag inflator |
FR2714374B1 (en) * | 1993-12-29 | 1996-01-26 | Poudres & Explosifs Ste Nale | Solid pyrotechnic compositions with thermoplastic binder and silylferrocene polybutadiene plasticizer. |
DE19600625A1 (en) * | 1996-01-10 | 1997-07-24 | Temic Bayern Chem Airbag Gmbh | Ignitor for gas generator used in vehicle air bags |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL122773C (en) * | 1960-06-24 |
-
1971
- 1971-05-07 US US00141311A patent/US3723205A/en not_active Expired - Lifetime
-
1972
- 1972-04-28 CA CA140,834A patent/CA972574A/en not_active Expired
- 1972-05-03 BE BE782988A patent/BE782988A/en unknown
- 1972-05-04 GB GB2081272A patent/GB1388627A/en not_active Expired
- 1972-05-06 IT IT50085/72A patent/IT957743B/en active
- 1972-05-08 FR FR7216361A patent/FR2137619B1/fr not_active Expired
- 1972-05-08 DE DE2222506A patent/DE2222506B2/en active Granted
Cited By (99)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3845970A (en) * | 1971-10-09 | 1974-11-05 | Bayern Chemie Gmbh Flugchemie | Shock absorption system for a motor vehicle |
USRE28624E (en) * | 1971-11-03 | 1975-11-25 | Argon compressed gas supply | |
US3986908A (en) * | 1972-07-05 | 1976-10-19 | Societe Nationale Des Poudres Et Explosifs | Composite propellants with a cellulose acetate binder |
US3853334A (en) * | 1972-12-11 | 1974-12-10 | Gen Motors Corp | Occupant restraint system |
US3865660A (en) * | 1973-03-12 | 1975-02-11 | Thiokol Chemical Corp | Non-toxic, non-corrosive, odorless gas generating composition |
US3985076A (en) * | 1973-11-19 | 1976-10-12 | Thiokol Corporation | Gas generator |
US3977924A (en) * | 1974-04-01 | 1976-08-31 | The United States Of America As Represented By The Secretary Of The Navy | Coolant additives for nitrogen generating solid propellants |
US3945338A (en) * | 1974-11-13 | 1976-03-23 | Affonso Henriques Correa | Location indicator for lost aircraft |
US4066415A (en) * | 1975-02-03 | 1978-01-03 | Nippon Oil And Fats Co., Ltd. | Gas generator for inflatable life raft |
US4152891A (en) * | 1977-10-11 | 1979-05-08 | Allied Chemical Corporation | Pyrotechnic composition and method of inflating an inflatable automobile safety restraint |
US4244758A (en) * | 1978-05-15 | 1981-01-13 | Allied Chemical Corporation | Ignition enhancer coating compositions for azide propellant |
US4203786A (en) * | 1978-06-08 | 1980-05-20 | Allied Chemical Corporation | Polyethylene binder for pyrotechnic composition |
US5184845A (en) * | 1988-05-20 | 1993-02-09 | Nissan Motor Co., Ltd. | Air-bag system |
US5015309A (en) * | 1989-05-04 | 1991-05-14 | Morton International, Inc. | Gas generant compositions containing salts of 5-nitrobarbituric acid, salts of nitroorotic acid, or 5-nitrouracil |
EP0445474A2 (en) * | 1990-03-07 | 1991-09-11 | Atlantic Research Corporation | Occupant restraint system and composition useful therein |
EP0445474A3 (en) * | 1990-03-07 | 1992-07-01 | Atlantic Research Corporation | Occupant restraint system and composition useful therein |
TR28515A (en) * | 1990-03-07 | 1996-09-10 | Atlantic Res Corp | Passenger retention system and a useful combination in the system. |
US4981534A (en) * | 1990-03-07 | 1991-01-01 | Atlantic Research Corporation | Occupant restraint system and composition useful therein |
US5022674A (en) * | 1990-04-05 | 1991-06-11 | Bendix Atlantic Inflator Company | Dual pyrotechnic hybrid inflator |
US5031932A (en) * | 1990-04-05 | 1991-07-16 | Frantom Richard L | Single pyrotechnic hybrid inflator |
US5076607A (en) * | 1990-11-27 | 1991-12-31 | Bendix Atlantic Inflator Co. | Hybrid inflator |
US5131680A (en) * | 1991-03-19 | 1992-07-21 | Trw Vehicle Safety Systems Inc. | Inflator assembly |
US5213362A (en) * | 1991-03-19 | 1993-05-25 | Trw Vehicle Safety Systems Inc. | Stab igniter assembly |
US5226667A (en) * | 1991-03-19 | 1993-07-13 | Trw Vehicle Safety Systems Inc. | Percussion igniter assembly |
US5199740A (en) * | 1991-06-10 | 1993-04-06 | Bendix Atlantic Inflator Co. | Hybrid inflator for air bag |
US5348344A (en) * | 1991-09-18 | 1994-09-20 | Trw Vehicle Safety Systems Inc. | Apparatus for inflating a vehicle occupant restraint using a mixture of gases |
USRE37843E1 (en) | 1991-09-18 | 2002-09-17 | Trw Vehicle Safety Systems Inc. | Apparatus for inflating a vehicle occupant restraint using a mixture of gases |
US5273312A (en) * | 1991-09-20 | 1993-12-28 | Trw Vehicle Safety Systems Inc. | Hybrid inflator having movable piston for releasing pressurized gas and conveying combustion products for ignition of secondary ignition material |
DE4231556C2 (en) * | 1991-09-20 | 2000-11-23 | Trw Vehicle Safety Systems | Hybrid gas generator |
DE4231556A1 (en) * | 1991-09-20 | 1993-04-01 | Trw Vehicle Safety Systems | inflator |
DE4236617A1 (en) * | 1991-11-01 | 1993-05-06 | Trw Vehicle Safety Systems Inc., Lyndhurst, Ohio, Us | |
US5263740A (en) * | 1991-12-17 | 1993-11-23 | Trw Inc. | Hybrid air bag inflator |
DE4242793A1 (en) * | 1991-12-17 | 1993-07-01 | Trw Vehicle Safety Systems | |
ES2064234A2 (en) * | 1992-09-18 | 1995-01-16 | Trw Vehicle Safety Systems | Apparatus for inflating a vehicle occupant restraint using a mixture of gases |
US5409259A (en) * | 1992-10-09 | 1995-04-25 | Morton International, Inc. | Gas generator for vehicle occupant restraint system |
US5443286A (en) * | 1992-10-09 | 1995-08-22 | Morton International, Inc. | Gas generator for vehicle occupant restraint system |
US5288104A (en) * | 1992-11-09 | 1994-02-22 | Johnny Chen | Buffering safe device in vehicles |
US5351989A (en) * | 1992-11-30 | 1994-10-04 | Trw Vehicle Safety Systems Inc. | Inflator assembly |
US5324075A (en) * | 1993-02-02 | 1994-06-28 | Trw Inc. | Gas generator for vehicle occupant restraint |
US5401340A (en) * | 1993-08-10 | 1995-03-28 | Thiokol Corporation | Borohydride fuels in gas generant compositions |
US5429691A (en) * | 1993-08-10 | 1995-07-04 | Thiokol Corporation | Thermite compositions for use as gas generants comprising basic metal carbonates and/or basic metal nitrates |
US5439537A (en) * | 1993-08-10 | 1995-08-08 | Thiokol Corporation | Thermite compositions for use as gas generants |
US5551724A (en) * | 1993-09-14 | 1996-09-03 | Morton International, Inc. | Treatment of inflatable restraint system inflator particulate-containing gas with expanded metal |
US5360232A (en) * | 1993-09-14 | 1994-11-01 | Morton International, Inc. | Filtration in hybrid inflators |
AU661631B2 (en) * | 1993-11-17 | 1995-07-27 | Morton International, Inc. | Improved PVC-based gas generant for hybrid gas generators |
EP0655429A1 (en) * | 1993-11-17 | 1995-05-31 | Morton International, Inc. | Improved PVC-based gas generant for hybrid gas generators |
US5566543A (en) * | 1993-11-17 | 1996-10-22 | Morton International, Inc. | PVC-based gas generant for hybrid gas generators |
JPH07187871A (en) * | 1993-11-17 | 1995-07-25 | Morton Internatl Inc | Improved pvc gas generator for hybrid gas generator |
US20100084060A1 (en) * | 1994-01-19 | 2010-04-08 | Alliant Techsystems Inc. | Metal complexes for use as gas generants |
US6969435B1 (en) | 1994-01-19 | 2005-11-29 | Alliant Techsystems Inc. | Metal complexes for use as gas generants |
US6481746B1 (en) | 1994-01-19 | 2002-11-19 | Alliant Techsystems Inc. | Metal hydrazine complexes for use as gas generants |
US20050067074A1 (en) * | 1994-01-19 | 2005-03-31 | Hinshaw Jerald C. | Metal complexes for use as gas generants |
US5592812A (en) * | 1994-01-19 | 1997-01-14 | Thiokol Corporation | Metal complexes for use as gas generants |
US5735118A (en) * | 1994-01-19 | 1998-04-07 | Thiokol Corporation | Using metal complex compositions as gas generants |
US5725699A (en) * | 1994-01-19 | 1998-03-10 | Thiokol Corporation | Metal complexes for use as gas generants |
US9199886B2 (en) | 1994-01-19 | 2015-12-01 | Orbital Atk, Inc. | Metal complexes for use as gas generants |
US5673935A (en) * | 1994-01-19 | 1997-10-07 | Thiokol Corporation | Metal complexes for use as gas generants |
US5586783A (en) * | 1994-02-24 | 1996-12-24 | Temic Bayern-Chemie Airbag Gmbh | Hybrid gas generator for filling a gas bag |
US5486248A (en) * | 1994-05-31 | 1996-01-23 | Morton International, Inc. | Extrudable gas generant for hybrid air bag inflation system |
US5738371A (en) * | 1994-06-14 | 1998-04-14 | Ad Astam Scientific, L.L.C. | Hybrid airbag inflator |
US5538278A (en) * | 1994-06-14 | 1996-07-23 | Ad Astram Enterprises, Inc. | Ignition train apparatus for hybrid airbag inflators |
US5660412A (en) * | 1994-12-12 | 1997-08-26 | Bendix-Atlantic Inflator Company | Hybrid inflator |
US5610444A (en) * | 1994-12-22 | 1997-03-11 | Societe Nationale Des Poudres Et Explosifs | Process for continuous manufacture of pyrotechnic charges containing a silicone binder and compositions capable of being used by this process |
EP0718257A1 (en) | 1994-12-22 | 1996-06-26 | Societe Nationale Des Poudres Et Explosifs | Method of continuous fabrication of silicone-bonded pyrotechnic charges and composition for use in such a fabrication method |
US5551725A (en) * | 1995-03-10 | 1996-09-03 | Ludwig; Christopher P. | Vehicle airbag inflator and related method |
US6860951B2 (en) * | 1995-03-10 | 2005-03-01 | Talley Defense Systems, Inc. | Gas generating compositions |
US5913537A (en) * | 1995-06-09 | 1999-06-22 | Trw Vehicle Safety Systems Inc. | Hybrid inflator including non-metallic nitrogen containing ignitable material |
WO1998008715A1 (en) * | 1995-06-13 | 1998-03-05 | Atlantic Research Corporation | Hybrid inflator for inflating air bags |
US5518268A (en) * | 1995-06-19 | 1996-05-21 | Morton International, Inc. | Flow-through heat-enhanced hybrid inflator |
US6273462B1 (en) | 1995-09-22 | 2001-08-14 | Trw Vehicle Safety Systems Inc. | Air bag inflator |
US5615912A (en) * | 1995-10-05 | 1997-04-01 | Trw Vehicle Safety Systems Inc. | Inflator for air bag |
EP0779260A2 (en) | 1995-12-13 | 1997-06-18 | Morton International, Inc. | Fuel compositions for use in hybrid inflators containing stored oxidizing gas |
US6142511A (en) * | 1995-12-22 | 2000-11-07 | Universal Propulsion Company | Inflatable passenger restraint and inflator therefor |
US6224097B1 (en) * | 1995-12-22 | 2001-05-01 | Universal Propulsion Company, Inc. | Inflator for inflatable restraint |
US6199905B1 (en) * | 1995-12-22 | 2001-03-13 | Universal Propulsion Company, Inc. | High thermal efficiency inflator and passive restraints incorporating same |
WO1997026159A1 (en) * | 1996-01-20 | 1997-07-24 | Trw Airbag Systems Gmbh & Co. Kg | Gas generator for producing a gas mixture |
US5622381A (en) * | 1996-06-07 | 1997-04-22 | Morton International, Inc. | Integral projectile squid for air bag inflators |
US6206418B1 (en) | 1996-08-09 | 2001-03-27 | S.N.C. Livbag | Hybrid generator with internal gas injection |
US5847311A (en) * | 1996-10-22 | 1998-12-08 | Trw Vehicle Safety Systems Inc. | Hybrid inflator with crystalline and amorphous block copolymer |
US6533878B1 (en) | 1997-12-12 | 2003-03-18 | Societe Nationale Des Poudres Et Explosifs | Pyrotechnic compositions generating non-toxic gases based on ammonium perchlorate |
US6093269A (en) * | 1997-12-18 | 2000-07-25 | Atlantic Research Corporation | Pyrotechnic gas generant composition including high oxygen balance fuel |
US6068290A (en) * | 1997-12-23 | 2000-05-30 | Trw Vehicle Safety System Inc. | Inflator structure |
US6510875B2 (en) * | 1999-07-14 | 2003-01-28 | Pennzoil | Inflating device and method of use |
US6195996B1 (en) | 1999-12-21 | 2001-03-06 | Trw Inc. | Body of gas generating material for a vehicle occupant restraint |
US6418870B1 (en) | 2000-05-31 | 2002-07-16 | Systems Engineering Associates Corporation | Torpedo launch mechanism and method |
US6557474B1 (en) | 2000-08-30 | 2003-05-06 | Glasseal Products | Initiator header subassembly for inflation devices |
US6824626B2 (en) | 2000-12-22 | 2004-11-30 | Snpe | Gas-generating pyrotechnic compositions with a binder and continuous manufacturing process |
GB2390132A (en) * | 2001-01-19 | 2003-12-31 | Bofors Bepab Ab | A method for controlling the burning pressure in a preinflator,preinflator per se and hybrid gas generator incorporating such a preinflator |
GB2390132B (en) * | 2001-01-19 | 2005-05-25 | Bofors Bepab Ab | A method for controlling the burning pressure in a preinflator,preinflator per se and hybrid gas generator incorporating such a preinflator |
US7156025B2 (en) | 2001-01-19 | 2007-01-02 | Autoliv Development Ab | Method for controlling the burning pressure in a preinflator, preinflator per se and hybrid gas generator incorporating such a preinflator |
US20050250059A1 (en) * | 2001-01-19 | 2005-11-10 | Thorbjorn Ostin | Method for controlling the burning pressure in apreinflator, preinflator per se and hybrid gas generator incorporating such a preinflator |
WO2002057703A1 (en) * | 2001-01-19 | 2002-07-25 | Bofors Bepab Ab | A method for controlling the burning pressure in a preinflator, preinflator per se and hybrid gas generator incorporating such a preinflator |
US20050040367A1 (en) * | 2001-12-11 | 2005-02-24 | Baerlocher Gmbh | Stabilizer composition, production and use thereof |
US20050146123A1 (en) * | 2003-12-17 | 2005-07-07 | Trw Airbag Systems Gmbh | Gas generator |
US20060055160A1 (en) * | 2004-09-16 | 2006-03-16 | Trw Vehicle Safety Systems Inc. | Inflator having a fluid |
US20060290108A1 (en) * | 2005-06-23 | 2006-12-28 | Trw Vehicle Safety Systems Inc. | Heated gas inflator |
US7380820B2 (en) | 2005-06-23 | 2008-06-03 | Trw Vehicle Safety Systems Inc. | Heated gas inflator |
US20210147314A1 (en) * | 2019-11-15 | 2021-05-20 | Goodrich Corporation | Inflation systems for evacuation slides and life rafts |
US11554999B2 (en) * | 2019-11-15 | 2023-01-17 | Goodrich Corporation | Inflation systems for evacuation slides and life rafts |
Also Published As
Publication number | Publication date |
---|---|
DE2222506A1 (en) | 1972-11-16 |
CA972574A (en) | 1975-08-12 |
DE2222506C3 (en) | 1975-04-03 |
IT957743B (en) | 1973-10-20 |
DE2222506B2 (en) | 1974-07-25 |
BE782988A (en) | 1972-09-01 |
GB1388627A (en) | 1975-03-26 |
FR2137619A1 (en) | 1972-12-29 |
FR2137619B1 (en) | 1974-09-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3723205A (en) | Gas generating composition with polyvinyl chloride binder | |
US3964255A (en) | Method of inflating an automobile passenger restraint bag | |
US3912562A (en) | Low temperature gas generator propellant | |
US4214438A (en) | Pyrotechnic composition and method of inflating an inflatable device | |
US3910805A (en) | Low temperature gas generating compositions | |
US4981534A (en) | Occupant restraint system and composition useful therein | |
US5861571A (en) | Gas-generative composition consisting essentially of ammonium perchlorate plus a chlorine scavenger and an organic fuel | |
US3862866A (en) | Gas generator composition and method | |
US4062708A (en) | Azide gas generating composition | |
US5551725A (en) | Vehicle airbag inflator and related method | |
KR100243443B1 (en) | Two-part igniter for gas generating compositions | |
KR100411997B1 (en) | Low Residual Azide-Glass Gas Generator Compositions | |
US4604151A (en) | Method and compositions for generating nitrogen gas | |
US4931111A (en) | Azide gas generating composition for inflatable devices | |
US3897285A (en) | Pyrotechnic formulation with free oxygen consumption | |
US4238253A (en) | Starch as fuel in gas generating compositions | |
US3901747A (en) | Pyrotechnic composition with combined binder-coolant | |
JP4029194B2 (en) | Ignition-type gas generation method that generates non-toxic, odorless and colorless gas without producing fine particles | |
KR20010033307A (en) | Pyrotechnic gas generant composition including high oxygen balance fuel | |
KR100516926B1 (en) | Autoignition propellant containing superfine iron oxide and method of lowering the autoignition temperature of an igniter | |
US5160386A (en) | Gas generant formulations containing poly(nitrito) metal complexes as oxidants and method | |
US5566543A (en) | PVC-based gas generant for hybrid gas generators | |
US5997666A (en) | GN, AGN and KP gas generator composition | |
US3928964A (en) | Pyrotechnic cool gas generation method for inflatable structure | |
KR100456135B1 (en) | Eutectic Compounds of Ammonium Nitrate, Guanidine Nitrate and Potassium Perchlorate |