Patent ID: 8808948
Filing Date: 2014-08-19
Classification: C01P,C09B,C09C,G03F

Abstract:
1. A method of producing a dispersion composition comprising titanium black, a solvent and a dispersant including at least a first dispersant and a second dispersant, the method comprising: dispersing a mixed liquid containing the titanium black, the first dispersant and the solvent using a bead mill; and adding the second dispersant to the dispersed mixed liquid and dispersing the same using a bead mill, wherein at least a part of the dispersant has an acid value of 50 mgKOH/g or more, and wherein the first dispersant and the second dispersant are the same as or different from each other, and wherein each of the first dispersant and the second dispersant is a graft copolymer comprising at least one selected from the group consisting of structural units represented by the following Formulae (1) to (5): wherein, in Formulae (1) to (5), each of X