Method for producing halogenated zinc phthalocyanine pigment
AssigneeDIC Corporation
InventorsKeisuke Sakamoto, Kentaro Oishi, Ryousuke Asami, Mayumi Tokuoka, Katsunori Shimada
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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.
Claims5
A method for producing a halogenated zinc phthalocyanine pigment, the method comprising a step of forming a halogenated zinc phthalocyanine crude pigment into a pigment,
- wherein 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.
Dependencies are inferred from the claim text.