Process for preparing pigment composition, pigment composition a

Details Process for preparing pigment composition, pigment composition a Process for preparing pigment composition, pigment composition a

1997-04-25

1998-07-07

Green, Anthony

Compositions: coating or plastic

Materials or ingredients

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

106 3177, 106413, 540140, 540141, C09B 6750

Patent

active

057762376

ABSTRACT:
According to the present invention, a resin is added to crude copper phthalocyanine comprising an .alpha.-form and a .beta.-form crystals in combination and dry-milling is performed in a deoxygenated atmosphere, to provide copper phthalocyanine pigment composition of superior quality which reduces considerable expenditure of time and labor associated with the pigmentation process of crude copper phthalocyanine and the printing ink production process of a pigment, and printing ink comprising .beta.-form copper phthalocyanine pigment superior quality.

REFERENCES:
patent: 4369272 (1983-01-01), Jaffe
patent: 4371642 (1983-02-01), Jaffe
patent: 4478968 (1984-10-01), Jaffe

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