Patent ID: 8232331
Filing Date: 2012-07-31
Classification: C09D,Y10T

Abstract:
1. A nonaqueous ink, comprising: colorant particles, the colorant particles having an average particle diameter of 1 nm or more and less than 50 nm, and the value (D a dispersant; and a cationically-polymerizable compound; wherein 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 cationically-polymerizable compound is at least one cationically-polymerizable compound selected from the group consisting of an oxetane compound, an oxirane compound and a vinyl ether compound, said nonaqueous ink prepared by a process which comprises the steps of: providing a colorant solution and an aqueous medium, in which a dispersant is contained in at least one of the colorant solution and the aqueous medium; bringing the colorant solution and the aqueous medium into contact each other, and thereby precipitating the colorant as fine particles; removing the fine particles in an agglomerate form; and bringing the removed colorant agglomerates into contact with an organic medium.