Method for producing halogenated zinc phthalocyanine pigment
AssigneeDIC Corporation
InventorsKeisuke Sakamoto, Kentaro Oishi, Ryousuke Asami, Mayumi Tokuoka, Katsunori Shimada
Life of this patent
Estimating the term…
Abstract
A method for producing a halogenated zinc phthalocyanine pigment includes a step of forming a halogenated zinc phthalocyanine crude pigment into a pigment. The halogenated zinc phthalocyanine crude pigment is obtained by deposition of a halogenated zinc phthalocyanine, which is synthesized by using a compound that generates an acid by reacting with water, and the step includes a pretreatment step of heating the halogenated zinc phthalocyanine crude pigment in water to obtain a halogenated zinc phthalocyanine prepigment having a pH of 5.0 or more.
Claims6
A method for producing a halogenated zinc phthalocyanine pigment from a halogenated zinc phthalocyanine crude pigment, the method comprising:
- providing the halogenated zinc phthalocyanine crude pigment synthesized from a compound that generates an acid by reacting with water followed by deposition;
- and
- a pretreatment step of heating the halogenated zinc phthalocyanine crude pigment in water to obtain a halogenated zinc phthalocyanine prepigment having a pH of 5.0 or more.
Dependencies are inferred from the claim text.