Process for making a phthalocyanine pigment dispersion

Details Process for making a phthalocyanine pigment dispersion Process for making a phthalocyanine pigment dispersion

1987-11-23

1989-08-01

Lieberman, Paul

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

106413, C09B 6750

Patent

active

048530395

ABSTRACT:
A process for making an aqueous pigment dispersion comprising substantially 100 percent .beta.-phase, isometric copper phthalocyanine pigment particles is carried out by activating a pigment crude, followed by fine-milling the activated crude in the presence of an emulsion, the fine-milling taking place in a stirring mill. The resulting pigment slurry is then isolated as an aqueous presscake.

REFERENCES:
patent: 4257951 (1981-03-01), Matrick
patent: 4541872 (1985-09-01), Jaffe

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