Effects of the Composition of Anthraquinones Pigment Dispersion and Dispersion Condition on the Properties of the Dispersion and the Coating for LCD Color Filters

摘要

An anthraquinone pigment C.I. Pigment Red 177 was dispersed in propylene glycol monomethyl ether acetate with sulfonic acid derivative of the pigment and poly (ethyleneimine) grafted poly (12-hydroxystearic acid) as dispersants. Using this dispersion, color resist inks for LCD color filters were prepared. In the observation of color filters surface prepared from the inks with a reflecting microscope, spherical foreign matters were found.