Patent ID: 7405245
Filing Date: 2008-07-29
Classification: C09D

Abstract:
1. An aqueous ink composition comprising at least water, a first polymer, a second polymer or copolymer which is a sulfonyl group-containing (co)polymer, a pigment dispersed by the first polymer, and an ultra-penetrating agent, wherein the sulfonyl group-containing (co)polymer is present in the form of an emulsion, and wherein the ultra-penetrating agent is a combination of a compound represented by the following formula (1) and triethylene glycol monobutyl ether: wherein, 0≦m+n≦50, and R 1 , R 2 , R 3 and R 4 each independently is an alkyl group, wherein the sulfonyl group-containing (co)polymer is a non-diene-based, sulfonyl group-containing (co)polymer, which is an acryl-based, sulfonyl group-containing (co)polymer.