Patent ID: 8232330
Filing Date: 2012-07-31
Classification: C09D,Y10T

Abstract:
1. A nonaqueous ink, comprising: colorant particles, a dispersant and a radical-polymerization compound; wherein the colorant particles having an average particle diameter of 1 nm or more and less than 50 nm, and having a (D wherein the colorant particles comprise quinacridone pigment particles or azo pigment particles; wherein the colorant particles have a crystalline structure as determined by a powder X-ray diffraction analysis, such that the colorant particles do not show a halo specific to an amorphous substance, and wherein the crystallite diameter of the colorant particles is 5 nm or more; and wherein the radical-polymerization compound is a monofunctional radically polymerizable monomer containing only one ethylenic unsaturated group selected from the group consisting of an acrylate group, a methacrylate group, an acrylamide group, a methacrylamide group and a N-vinyl group.