USRE39561E1 - Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts - Google Patents
Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts Download PDFInfo
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- USRE39561E1 USRE39561E1 US08/895,950 US89595097A USRE39561E US RE39561 E1 USRE39561 E1 US RE39561E1 US 89595097 A US89595097 A US 89595097A US RE39561 E USRE39561 E US RE39561E
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- 0 CC.CC.[1*]C([2*])(C)C.[3*]c1c([5*])c(C[7*]Cc2c([6*])c([4*])c3c2CCCC3)c2c1CCCC2 Chemical compound CC.CC.[1*]C([2*])(C)C.[3*]c1c([5*])c(C[7*]Cc2c([6*])c([4*])c3c2CCCC3)c2c1CCCC2 0.000 description 17
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F17/00—Metallocenes
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic System
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/0805—Compounds with Si-C or Si-Si linkages comprising only Si, C or H atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/04—Monomers containing three or four carbon atoms
- C08F110/06—Propene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/62—Refractory metals or compounds thereof
- C08F4/639—Component covered by group C08F4/62 containing a transition metal-carbon bond
- C08F4/63912—Component covered by group C08F4/62 containing a transition metal-carbon bond in combination with an organoaluminium compound
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
- C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
- C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
- C08F4/62—Refractory metals or compounds thereof
- C08F4/639—Component covered by group C08F4/62 containing a transition metal-carbon bond
- C08F4/6392—Component covered by group C08F4/62 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
- C08F4/63922—Component covered by group C08F4/62 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not
- C08F4/63927—Component covered by group C08F4/62 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not two cyclopentadienyl rings being mutually bridged
Definitions
- the present invention relates to novel metallocenes which contain ligands of 2-substituted indenyl derivatives and can very advantageously be used as catalysts in the preparation of polyolefins of high melting point (high isotacticity).
- Polyolefins of relatively high melting point and thus relatively high crystallinity and relatively high hardness are particularly important as engineering materials (for example large hollow articles, tubes and moldings).
- Chiral metallocenes are, in combination with aluminoxanes, active, stereospecific catalysts for the preparation of polyolefins (U.S. Pat. No. 4,769,510). These metallocenes also include substituted indene compounds.
- aluminoxanes active, stereospecific catalysts for the preparation of polyolefins
- These metallocenes also include substituted indene compounds.
- the use of the ethylenebis(4,5,6,7-tetrahydro-1-indenyl)zirconium dichloride/aluminoxane catalyst system is known for the preparation of isotactic polypropylene; cf. EP-A 185 918). Both this and numerous other polymerization processes coming under the prior art have, in particular, the disadvantage that, at industrially interesting polymerization temperatures, only polymers of relatively low melting points are obtained. Their crystallinity and thus their hardness are too low for use as engineering materials.
- metallocenes which contain, as ligands, certain 2-substituted indenyl derivatives are suitable catalysts for the preparation of polyolefins of high isotacticity (melting point) and narrow molecular weight distribution.
- M 1 is a metal from group IVb, Vb or VIb of the Periodic Table, for example titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum or tungsten, preferably zirconium, hafnium or titanium.
- the radicals R 10 are identical or different and are as defined for R 11 , R 12 and R 13 .
- the radicals R 10 are preferably hydrogen atoms or C 1 -C 10 -, preferably C 1 -C 4 -alkyl groups.
- the particularly preferred metallocenes are thus those in which, in the formula I, M 1 is Zr or Hf, R 1 and R 2 are identical or different and are methyl or chlorine, R 3 and R 4 are hydrogen, R 5 and R 6 are identical or different and are methyl, ethyl or trifluoromethyl, R 7 is a radical, n plus m is zero or 1, and R 10 is hydrogen; in particular the compounds I listed in the working examples.
- rac-dimethylsilyl(2-methyl-4,5,6,7-tetrahydro-1-indenyl) 2 zirconium dichloride rac-ethylene(2-methyl-4,5,6,7-tetrahydro-1-indenyl) 2 zirconium dichloride, racdimethylsilyl(2-methyl-4,5,6,7-tetrahydro-1-indenyl) 2 dimethylzirconium and rac-ethylene(2-methyl-4,5,6,7-tetrahydro-1-indenyl) 2 dimethylzirconium are particularly important.
- the chiral metallocenes are employed as racemates for the preparation of highly isotactic poly-1-olefins. However, it is also possible to use the pure R- or S-form. These pure stereoisomeric forms allow the preparation of an optically active polymer. However, the meso form of the metallocenes should be separated off since the polymerization-active center (the metal atom) in these compounds is no longer chiral due to mirror symmetry at the central metal, and it is therefore not possible to produce a highly isotactic polymer.
- the present invention furthermore provides a process for the preparation of the metallocenes I, which comprises
- the synthesis is carried out under a protective gas and in anhydrous solvents.
- the dried salt of the formula II/IIa is added to a suspension of the compound of the formula III in a solvent such as toluene, n-hexane, dichloromethane, ether, THF, n-pentane or benzene, preferably dichloromethane or toluene.
- the reaction temperature is from ⁇ 78° C. to 30° C., preferably from ⁇ 40° C. to 10° C.
- the reaction duration is from 0.25 to 24 hours, preferably from 1 to 4 hours.
- a further embodiment of the process according to the invention comprises replacing the compound III, M 1 X 4 , by a compound of the formula IIIa, M 1 X 4 L 2 .
- L is a donor ligand.
- suitable donor ligands are tetrahydrofuran, diethyl ether, dimethyl ether, inter alia, preferably tetrahydrofuran (THF).
- a solution of the salt of the formula II/IIa in one of the abovementioned solvents is added to a solution or suspension of a compound of the formula IIIa in a solvent such as toluene, xylene, ether or THF, preferably THF.
- a solvent such as toluene, xylene, ether or THF, preferably THF.
- an alternative procedure is to simultaneously add both components dropwise to a solvent. This is the preferred procedure.
- the reaction temperature is from ⁇ 40° C. to 100° C., preferably from 0° C. to 50° C., in particular from 10° C. to 35° C.
- the reaction duration is from 0.25 hour to 48 hours, preferably from 1 hour to 24 hours, in particular from 2 hours to 9 hours.
- the hydrogenation is carried out in a dry, anhydrous solvent such as H 2 CCl 2 or glyme.
- the reaction temperature is 20° to 70° C., preferably from ambient temperature to 50° C.
- the pressure is from 5 to 200 bar, preferably from 20 to 120 bar, in particular from 35 to 100 bar
- the reaction duration is from 0.25 to 24 hours, preferably from 0.5 to 18 hours, in particular from 1 to 12 hours.
- Hydrogenation reactors which can be used are steel autoclaves.
- the hydrogenation catalyst used is platinum, platinum oxide, palladium or another conventional transition-metal catalyst.
- halogen derivatives obtained in this way can be converted into the alkyl, aryl or alkenyl complexes by known standard methods.
- the compounds of the formulae II and IIa are synthesized by deprotonation. This reaction is known; cf. J. Am. Chem. Soc., 112 (1990) 2030-2031, ibid. 110 (1988) 6255-6256, ibid. 109 (1987), 6544-6545, J. Organomet. Chem., 322 (1987) 65-70, New. J. Chem. 14 (1990) 499-503 and the working examples.
- the metallocenes I can thus in principle be prepared in accordance with the reaction scheme below:
- the cocatalyst used according to the invention in the polymerization of olefins is an aluminoxane of the formula (IV) for the linear type and/or of the formula (V) for the cyclic type, where, in the formulae (IV) and (V), the radicals R may be identical or different and are a C 1 -C 6 -alkyl group, a C 6 -C 18 -aryl group or hydrogen, and p is an integer from 2 to 50, preferably from 10 to 35.
- the radicals R are preferably identical and are methyl, isobutyl, phenyl or benzyl, particularly preferably methyl.
- radicals R are different, they are preferably methyl and hydrogen or alternatively methyl and isobutyl, preferably from 0.01 to 40% (of the number of radicals R) being hydrogen or isobutyl.
- the aluminoxane can be prepared in different ways by known processes.
- One of the methods is, for example, the reaction of an aluminium-hydrocarbon compound and/or a hydridoaluminum-hydrocarbon compound with water (gaseous, solid, liquid or bound—for example as water of crystallization) in an inert solvent (such as, for example, toluene).
- an inert solvent such as, for example, toluene.
- two different trialkylaluminum compounds AlR 3 +AlR′ 3
- water cf. S. Pasynkiewicz, Polyhedron 9 (1990) 429 and EP-A 302 424).
- the preactivation of the transition-metal compound is carried out in solution.
- the metallocene is preferably dissolved in a solution of the aluminoxane in an inert hydrocarbon.
- Suitable inert hydrocarbons are aliphatic or aromatic hydrocarbons. Toluene is preferred.
- the concentration of the aluminoxane in the solution is in the range from about 1% by weight up to the saturation limit, preferably from 5 to 30% by weight, in each case based on the entire solution.
- the metallocene can be employed in the same concentration, but is preferably employed in an amount of from 10 ⁇ 4 ⁇ 1 mol per mole of aluminoxane.
- the preactivation time is from 5 minutes to 60 hours, preferably from 5 to 60 minutes.
- the preactivation temperature is from ⁇ 78° C. to 100° C., preferably from 0 to 70° C.
- the metallocene can also be prepolymerized or applied to a support.
- the prepolymerization is preferably carried out using the olefin (or one of the olefins) employed in the polymerization.
- suitable supports are silica gels, aluminum oxides, solid aluminoxane or other inorganic support materials.
- Another suitable support material is a polyolefin powder in finely divided form.
- a further possible variation of the process comprises using a salt-like compound of the formula R x NH 4-x BR′ 4 or of the formula R 3 PHBR′ 4 as cocatalyst instead of or in addition to an aluminoxane.
- x here is 1, 2 or 3, the R radicals are identical or different and are alkyl or aryl, and R′ is aryl, which may also be fluorinated or partially fluorinated.
- the catalyst comprises the product of the reaction of a metallocene with one of said compounds (cf. EP-A 277 004).
- the polymerization or copolymerization is carried out in a known manner in solution, in suspension or in the gas phase, continuously or batchwise, in one or more steps, at a temperature of from 0° to 150° C., preferably from 30° to 80° C.
- Olefins of the formula R a —CH ⁇ CH—R b are polymerized or copolymerized.
- R a and R b are identical or different and are a hydrogen atom or an alkyl radical having 1 to 14 carbon atoms.
- R a and R b together with the carbon atoms connecting them, may also form a ring.
- olefins are ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, 1-octene, norbornene or norbornadiene.
- propylene and ethylene are polymerized.
- the molecular weight regulator added is hydrogen.
- the overall pressure in the polymerization system is from 0.5 to 100 bar.
- the polymerization is preferably carried out in the industrially particularly interesting pressure range of from 5 to 64 bar.
- the metallocene is used in a concentration, based on the transition metal, of from 10 ⁇ 3 to 10 ⁇ 8 , preferably from 10 ⁇ 4 to 10 ⁇ 7 mol of transition metal per dm 3 of solvent or per dm 3 of reactor volume.
- the aluminoxane is used in a concentration of from 10 ⁇ 5 to 10 ⁇ 1 mol, preferably from 10 ⁇ 4 to 10 ⁇ 2 mol, per dm 3 of solvent or per dm 3 of reactor volume. In principle, however, higher concentrations are also possible.
- the polymerization is carried out as a suspension or solution polymerization, an inert solvent which is customary for the Ziegler low-pressure process is used.
- the polymerization is carried out in an aliphatic or cycloaliphatic hydrocarbon; examples of these which may be mentioned are butane, pentane, hexane, heptane, isooctane, cyclohexane and methylcyclohexane.
- the polymerization is preferably carried out in the liquid monomer.
- the monomers are metered in in gaseous or liquid form.
- the polymerization can have any desired duration since the catalyst system to be used according to the invention exhibits only a low time-dependent drop in polymerization activity.
- the process is distinguished by the fact that the metallocenes according to the invention give, in the industrially interesting temperature range of between 30° and 80° C, polymers of high molecular weight, high stereospecificity, narrow molecular weight dispersity and, in particular, high melting point, which is to say high crystallinity and high hardness.
- VN viscosity number in cm 3 /g determined
- M w weight average molecular weight by gel perme- M w /M
- the melting points and heats of melting ⁇ H melt were determined using DSC (heating and cooling rate 20° C./min).
- the 1 H-NMR spectrum exhibits the signals expected for an isomer mixture with respect to shift and integration ratio.
- the 1 H-NMR spectrum corresponds to expectations for an isomer mixture in signal shift and integration.
- the dilithio salt obtained in this way was added at ⁇ 78° C. to a suspension of 1.24 g (5.32 mmol) of ZrCl in 50 cm 3 of CH 2 Cl 2 , and the mixture was stirred at this temperature for 3 hours. The mixture was then warmed to room temperature overnight and evaporated.
- the 1 H-NMR spectrum showed, in addition to the presence of some ZrCl 4 (thf) 2 , a rac/meso mixture. After stirring with n-pentane and drying, the solid, yellow residue was suspended in THF, filtered off and examined by NMR spectroscopy. These three working steps were repeated a number of times; finally, 0.35 g (0.73 mmol/14%) of product was obtained in which the rac form, according to 1 H-NMR, was enriched to more than 17:1.
- ⁇ 0.90 (s, 6H, Me-Si); 1.43-1.93 (m, 8H, indenyl-H); 2.10 (s, 6H, 2-Me); 2.44-3.37 (m, 8H, indenyl-H); 6.05 (s, 2H, 3-H-Ind).
- Ind indenyl
- THF tetrahydrofuran
- PP polypropylene
- PE polyethylene
- Metallocenes I as catalysts for the polymerization of olefins.
- the activity of the metallocene was 50.3 kg of PP/g of metallocene ⁇ h.
- Example 1 was repeated, but 19.5 mg (0.04 mmol) of the metallocene were employed, and the polymerization temperature was 50° C.
- the activity of the metallocene was 18.8 kg of PP/g of metallocene ⁇ h.
- Example 1 was repeated, but 58.0 mg (0.12 mmol) of the metallocene were used and the polymerization temperature was 30° C.
- the activity of the metallocene was 9.7 kg of PP/g of metallocene ⁇ h.
- Examples 1 to 3 were repeated, but the metallocenes dimethylsilyl(2-Me-1-indenyl) 2 zirconium dichloride (metallocene 1 ), dimethylsilyl(4,5,6,7-tetrahydro-1-indenyl) 2 zirconium dichloride (metallocene 2) and dimethylsilyl(1-indenyl) 2 zirconium dichloride (metallocene 3) were used.
- Comparative Examples F/G with D/E confirms the positive effect of the 4,5,6,7-tetrahydroindenyl ligand compared with indenyl
- Comparative Examples F/G/H compared with A/B/C show the positive effect of the substitution in the 2-position of the indenyl ligand.
- Example 1 was repeated, but 6.8 mg (0.015 mmol) of ethylene(2-Me-4,5,6,7-tetrahydro-1-indenyl) 2 zirconium dichloride were employed.
- the metallocene activity was 72.5 kg of PP/g of metallocene ⁇ h.
- Example 4 was repeated, but 28.1 mg (0.062 mmol) of the metallocene were used and the polymerization temperature was 50° C.
- the metallocene activity was 28.5 kg of PP/g of metallocene ⁇ h.
- Example 4 was repeated, but 50 mg (0.110 mmol) of the metallocene were used and the polymerization temperature was 30° C.
- the metallocene activity was 10.9 kg of PP/g of metallocene ⁇ h.
- Examples 4 to 6 were repeated, but the metallocenes ethylene(1-indenyl) 2 zirconium dichloride (metallocene 4) and ethylene(2-Me-1-indenyl) 2 zirconium dichloride (metallocene 5) were used.
Abstract
in which, preferably, M1 is Zr or Hf, R1 and R2 are alkyl or halogen, R3 and R4 are hydrogen, R5 and R6 are alkyl or haloalkyl, —(CR8R9)m—R7—(CR8R9)n— is a single- or multi-membered chain in which R7 may also be a (substituted) hetero atom, m+n is zero or 1, and R10 is hydrogen, form, together with aluminoxanes as cocatalysts, a very effective catalyst system for the preparation of polyolefins of high stereospecificity and high melting point.
Description
- M1 is a metal from group IVb, Vb or VIb of the Periodic Table,
- R1 and R2 are identical or different and are a hydrogen atom, a C1-C10-alkyl group, a C1-C10-alkoxy group, a C6-C10-aryl group, a C6-C10-aryloxy group, a C2-C10-alkenyl group, a C7-C40-arylalkyl group, a C7-C40-alkylaryl group, a C8-C40-arylalkenyl group or a halogen atom,
- R3 and R4 are identical or different and are a hydrogen atom, a halogen atom, a C1-C10-alkyl group, which may be halogenated, a C6-C10-aryl group, an —NR2 15, —SR15, —OSiR3 15, —SiR3 15 or —PR2 15 radical in which R15 is a halogen atom, a C1-C10-alkyl group or a C6-C10-aryl group,
- R5 and R6 are identical or different and are as defined for R3 and R4, with the proviso that R5 and R6 are not hydrogen,
- R7 is
where - R11, R12 and R13 are identical or different and are a hydrogen atom, a halogen atom, a C1-C10-alkyl group, a C1-C10-fluoroalkyl group, a C6-C10-aryl group, a C6-C10-fluoroaryl group, a C1-C10-alkoxy group, a C2-C10-alkenyl group, a C7-C40-arylalkyl group, a C8-C40-arylalkenyl group or a C7-C40-alkylaryl group, or R11 and R12 or R11 and R13, in each case with the atoms connecting them, form a ring,
- M2 is silicon, germanium or tin,
- R8 and R9 are identical or different and are as defined for R11,
- m and n are identical or different and are zero, 1 or 2, m plus n being zero, 1 or 2, and,
- the radicals R10 are identical or different and are as defined for R11, R12 and R13.
- Alkyl is straight-chain or branched alkyl. Halogen (halogenated) is fluorine, chlorine, bromine or iodine, preferably fluorine or chlorine.
- R1 and R2 are identical or different and are a hydrogen atom, a C1-C10-, preferably C1-C3-alkyl group, a C1-C10-, preferably C1-C3-alkoxy group, a C6-C10-, preferably C6-C8-aryl group, a C6-C10-, preferably C6-C8-aryloxy group, a C2-C10-, preferably C2-C4-alkenyl group, a C7-C40-, preferably C7-C10-arylalkyl group, a C7-C40-, preferably C7-C12-alkylaryl group, a C8-C40-, preferably C8-C12-arylalkenyl group or a halogen atom, preferably chlorine.
- R3 and R4 are identical or different and are a hydrogen atom, a halogen atom, preferably a fluorine, chlorine or bromine atom, a C1-C10-, preferably C1-C4-alkyl group, which may be halogenated, a C6-C10-, preferably C6-C8-aryl group, an —NR2 15, —SR15, —O—SiR3 15, —SiR3 15 or —PR2 15 radical in which R15 is a halogen atom, preferably a chlorine atom, or a C1-C10-, preferably C1-C3-alkyl group or a C6-C10-, preferably C6-C8-aryl group. R3 and R4 are particularly preferably hydrogen.
- R5 and R6 are identical or different, preferably identical, and are as defined for R3 and R4, with the proviso that R5 and R6 cannot be hydrogen. R5 and R6 are preferably (C1-C4)-alkyl, which may be halogenated, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl or trifluoromethyl, in particular methyl.
- R7 is
═BR11, ═AlR11, —Ge—, —Sn—, —O—, —S—, ═SO, ═SO2, ═NR11, ═CO, ═PR11 or ═P(O)R11, where R11, R12 and R13 are identical or different and are a hydrogen atom, a halogen atom, a C1-C10-, preferably C1-C4-alkyl group, in particular a methyl group, a C1-C10-fluoroalkyl group, preferably a CF3 group, a C6-C10-, preferably C6-C8-aryl group, a C6-C10-fluoroaryl group, preferably a pentafluorophenyl group, a C1-C10-, preferably C1-C4-alkoxy group, in particular a methoxy group, a C2-C10-, preferably C2-C4-alkenyl group, a C7-C40-, preferably C7-C10-arylalkyl group, a C8-C40-, preferably C8-C12-arylalkenyl group or a C7-C40-, preferably C7-C12-alkylaryl group, or R11 and R12 or R11 and R13, in each case together with the atoms connecting them, form a ring. - M2 is silicon, germanium or tin, preferably silicon or germanium.
- R7 is preferably ═CR11R12, ═SiR11R12, ═GeR11R12, —O—, —S—, ═SO, ═PR11 or ═P(O)R11.
- R8 and R9 are identical or different and are as define as for R11.
- m and n are identical or different and are zero, 1 or 2, preferably zero or 1, where m plus n is zero, 1 or 2, preferably zero or 1.
radical, n plus m is zero or 1, and R10 is hydrogen; in particular the compounds I listed in the working examples.
- a) reacting a compound of the formula II
in which R3-R10, m and n are defined in the formula I and M3 is an alkali metal, preferably lithium, with a compound of the formula III
M1X4 (III)
in which M1 is a defined in the formula I, and X is a halogen atom, preferably chlorine, and catalytically hydrogenating the reaction product, or - b) reacting a compound of the formula IIa
with a compound of the formula III
M1X4 (III)
in which all the substituents are as defined under a), and, if desired, derivatizing the reaction product obtained under a) or b).
for the linear type and/or of the formula (V)
for the cyclic type, where, in the formulae (IV) and (V), the radicals R may be identical or different and are a C1-C6-alkyl group, a C6-C18-aryl group or hydrogen, and p is an integer from 2 to 50, preferably from 10 to 35.
VN = | viscosity number in cm3/g | ||
determined | |||
Mw = | weight average molecular weight | by gel perme- | |
Mw/Mn = | molecular weight dispersity | ation chroma- | |
tography |
II = | isotactic index (II = mm + 1/8 ms), determined by |
13C-NMR spectroscopy | |
niso = | length of the isotactic blocks (in propylene units) |
(niso = 1 + 2 mm/mr), determined by 13C-NMR | |
spectroscopy | |
Comp. | Polym. | M.p. | ΔHmeh | ||
Ex. | Metallocene | temp. [° C.] | niso | [° C. ] | [J/g] |
A | 1 | 70 | 38 | 145 | 86.6 |
B | 1 | 50 | 48 | 148 | 88.1 |
C | 1 | 30 | 48 | 152 | 90.2 |
D | 2 | 70 | 34 | 141 | — |
E | 2 | 50 | 38 | 143 | — |
F | 3 | 70 | 32 | 140 | — |
G | 3 | 50 | 34 | 142 | — |
H | 3 | 30 | 37 | 145 | — |
Comp. | Polym. | M.p. | ΔHmeh | ||
Ex. | Metallocene | temp. [° C.] | niso | [° C. ] | [J/g] |
I | 4 | 70 | 23 | 132 | 64.9 |
K | 4 | 50 | 30 | 138 | 78.1 |
L | 4 | 30 | 29 | 137 | 78.6 |
M | 5 | 70 | 25 | 134 | 77.0 |
N | 5 | 50 | 30 | 138 | 78.9 |
O | 5 | 30 | 32 | 138 | 78.6 |
Claims (23)
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US08/895,950 USRE39561E1 (en) | 1990-11-12 | 1997-07-17 | Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts |
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US07/789,361 US5276208A (en) | 1990-11-12 | 1991-11-08 | Metallocenes containing ligands of 2-substituted idenyl derivatives, process for their preparation, and their use as catalysts |
US08/324,260 USRE37208E1 (en) | 1990-11-12 | 1994-10-17 | Polyolefins prepared with metallocene catalysts having 2-substituted indenyl type ligands |
US08/895,950 USRE39561E1 (en) | 1990-11-12 | 1997-07-17 | Metallocenes containing ligands of 2-substituted indenyl derivatives, process for their preparation, and their use as catalysts |
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US20080200708A1 (en) * | 2002-10-25 | 2008-08-21 | Basell Polyolefine Gmbh | Preparation of Partially Hydrogenated Rac-Ansa-Metallocene Complexes |
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Cited By (2)
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US20080200708A1 (en) * | 2002-10-25 | 2008-08-21 | Basell Polyolefine Gmbh | Preparation of Partially Hydrogenated Rac-Ansa-Metallocene Complexes |
US7619106B2 (en) * | 2002-10-25 | 2009-11-17 | Basell Polyolefine Gmbh | Preparation of partially hydrogenated rac-ansa-metallocene complexes |
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