Patent ID: 6676735
Filing Date: 2004-01-13
Classification: C09D

Abstract:
An aqueous ink comprising at least a colorant, a water-soluble organic solvent and a compound represented by general formula (I) shown below, wherein said water-soluble organic solvent stays liquid at a temperature of not higher than 40Â° C., exhibits a water solubility of not lower than 1% by weight at a temperature of 20Â° C. and a saturated vapor pressure of not higher than 1.7 Pa at a temperature of 20Â° C. and is contained in an amount of from 5 to 35% by weight; wherein the weight ratio of content of said compound represented by general formula (I) to said water-soluble organic solvent is from 1:1 to 1:100; and wherein said water-soluble organic solvent comprises at least one compound selected from the group consisting of glycerin, 1,5-pentanediol and triethylene glycol: wherein Y represents a nonmetallic atom group required to form a 5- to 7-membered ring with C and N; X represents, an oxyradical group, and R1 to R4 may be the same or different and each represents a hydrogen atom or alkyl group, with the proviso that any two of R1 to R4 and Y may be connected to each other to form a 5- to 7-membered ring.