Patent ID: 8008391
Filing Date: 2011-08-30
Classification: C09B,C09C,C09D

Abstract:
1. An aqueous pigment dispersion containing carbon black or an organic pigment (P), a (meth)acrylic copolymer (A), a polyoxyethylene/polyoxypropylene block copolymer (B) represented by the following general formula (1), a polyether based polyurethane (C), a basic material and water, wherein a mass ratio of the total of nonvolatile contents of the (meth)acrylic copolymer (A), the polyoxyethylene/polyoxypropylene block copolymer (B) and the polyether based polyurethane (C) to the carbon black or organic pigment (P), (A+B+C)/P, is from 0.3 to 1.6; and that a mass ratio of the (meth)acrylic copolymer (A) to the total of nonvolatile contents of the resin component, A/(A+B+C), is from 0.05 to 0.45: wherein each of a, b and c represents an integer.