IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
US007611570B2
(12) United States Patent ao) Patent No.: Us 7,611,570 B2
Koike et al. (45) Date of Patent: Nov. 3,2009
(30) Foreign Application Priority Data
Apr. 5,2006 (JP) 2006-103724
(51) Int. CI.
C09D 11/02 (2006.01)
B41J2/01 (2006.01)
(52) U.S. CI 106/31.43; 106/31.58; 106/31.59;
106/31.75; 106/31.86; 106/31.89; 347/100
(58) Field of Classification Search 106/31.43,
106/31.58, 31.59, 31.75, 31.86, 31.89; 347/100 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
4,557,761 A 12/1985 Kobayashi et al 106/22
4,632,703 A 12/1986 Koike et al 106/22
4,661,158 A 4/1987 Kobayashi et al 106/22
4,689,078 A 8/1987 Koike et al 106/22
4,702,742 A 10/1987 Iwataetal 8/495
4,838,938 A 6/1989 Tomidaetal 106/22
4,849,770 A 7/1989 Koike et al 346/1.1
4,853,036 A 8/1989 Koike et al 106/20
4,923,515 A 5/1990 Koike et al 106/22
An ink jet recording ink is provided which does not have a problem concerning curling of a recording medium containing cellulose, and can deal with high-definition image recording while maintaining good response at a high level during ejection at a high drive frequency and good startup properties. The ink contains water, a colorant, a compound represented by the following general formula (I) accounting for 8 to 40% by mass of the total mass of the ink, and plural types of nonionic surfactants accounting for 0.3 to 5% by mass of the total mass of the ink, wherein the mass ratio (A:B) between the mass (A) of the compound represented by the general formula (I) and the mass (B) of the plural types of nonionic surfactants is in a range of 5:1 to 90:1:
8 Claims, 2 Drawing Sheets
