Method for producing halogenated zinc phthalocyanine pigment
AssigneeDIC Corporation
InventorsKeisuke Sakamoto, Ayaka Yamaji, Nozomi Shimizu, 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 depositing a halogenated zinc phthalocyanine, which is synthesized by using a compound that generates an acid by reacting with water, and the aforementioned step includes a pretreatment step of dry-crushing the halogenated zinc phthalocyanine crude pigment by using an attritor and then washing the dry-crushed halogenated zinc phthalocyanine crude pigment with water.
Claims4
A method for producing a halogenated zinc phthalocyanine pigment from a halogenated zinc phthalocyanine crude pigment, comprising:
- providing the halogenated zinc phthalocyanine crude pigment synthesized from a compound that generates an acid by reacting with water followed by deposition;
- a pretreatment step of dry-crushing the halogenated zinc phthalocyanine crude pigment without a water-soluble inorganic salt in an attritor to obtain a prepigment;
- and
- washing the prepigment with water, thereby forming the halogenated zinc phthalocyanine pigment.
Dependencies are inferred from the claim text.