Patent ID: 6803395
Filing Date: 2004-10-12
Classification: C09D

Abstract:
An ink composition which comprises water, a colorant, and a lightfastness agent of one of the formulae wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 each, independently of the others, is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, R11 and R12 each, independently of the others, is an alkylene group, an arylene group, an arylalkylene group, or an alkylarylene group, G is a cationic moiety, A is an anionic moiety, n is an integer representing the number of repeat â€”OSi(R7)(R8)-monomer units, a is an integer representing the number of repeat â€”OSi(R10)(R12-lightfastness moiety)-monomer units, and c is an integer representing the number of repeat â€”OSi(R9)(R11-hydrophilic moiety)-monomer units.