METHOD FOR PRODUCING amp;epsi;-TYPE COPPER PHTHALOCYANINE PIGMENT, amp;epsi;-TYPE COPPER PHTHALOCYANINE PIGMENT PRODUCED BY THE METHOD, AND COLORED COMPOSITION USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an ε-type copper phthalocyanine pigment having low viscosity characteristics suitable for coating, and providing a film having high brightness, visibility, and high transmissivity when used for a color filter usable for a color liquid crystal display device and a solid image sensor.;SOLUTION: The ε-type copper phthalocyanine pigment is produced by carrying out a process for producing the ε-type copper phthalocyanine pigment in the presence of a sorbitan-based surfactant. The ε-type copper phthalocyanine pigment is produced well by adding the sorbitan-based surfactant in a step of carrying out wet milling in the presence of inorganic salts and an organic solvent.;COPYRIGHT: (C)2010,JPO&INPIT