Preparation of polyhalocopper phthalocyanine pigments of high co

Details Preparation of polyhalocopper phthalocyanine pigments of high co Preparation of polyhalocopper phthalocyanine pigments of high co

1987-10-23

1988-12-06

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540136, 540138, C09B 4704, C09B 4708

Patent

active

047897392

ABSTRACT:
Polyhalocopper phthalocyanine pigments of high color strength are prepared by recrystallizing the finely divided agglomerated crude pigment in a heterogeneous aqueous organic phase at elevated temperatures by a process in which the aqueous organic phase used is a heterogeneous mixture of an aliphatic ketone having a total of 3 to 9 carbon atoms and water. The process gives the pigments in the form of spherical granules which are dust-free or have a low dust content. The pigments give deep, brilliant colorations of pure hues.

REFERENCES:
patent: 3353977 (1967-11-01), Kranz et al.
patent: 3730750 (1973-05-01), Fabian
patent: 4680387 (1987-07-01), Kranz

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