Patent ID: 7754785
Filing Date: 2010-07-13
Classification: C01P,C09B,C09C,C09D

Abstract:
1. A pigment dispersion comprising: at least one resin-coated pigment comprising a resin and a pigment, and having an average particle diameter of 250 nm or less; and a dispersion medium having a viscosity of 30 mPa·s or less at a temperature of 25° C. and a boiling point of 150° C. or more at 1 atm, the dispersion medium containing as a major component a cation polymeric compound selected from a group consisting of: a compound having a molecular weight of not more than 1000 and comprising a cyclic ether moiety; an acrylic compound having an epoxy, oxetane, or oxolane group; a vinyl compound having an epoxy, oxetane, or oxolane group; a carbonate compound; a low molecular melamine compound; a vinyl ether; a vinyl carbazole; a styrene derivative; an alpha-methylstyrene derivative; a vinyl alcohol ester; an ester of vinyl alcohol having an acryl or a methacryl group; and a monomer having a cation polymerizable vinyl bond; wherein a mixing ratio of the pigment is confined within the range of 3 to 41% by weight based on a total weight of the dispersion medium, and a ratio of the resin in the resin-coated pigment is confined within the range of 5 to 37% by weight based on the weight of the pigment.