Process for preparation of opaque quinacridones

Details Process for preparation of opaque quinacridones Process for preparation of opaque quinacridones

1988-06-20

1990-01-23

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C09B 4800

Patent

active

048959480

ABSTRACT:
A process for preparing opaque pigmentary quinacridone derivatives which comprises milling the starting quinacridone materials at ambient or near ambient temperatures in the presence of an alcohol and a base.

REFERENCES:
patent: 3298847 (1967-01-01), Hanke
patent: 4298398 (1981-11-01), Fitzgerald
patent: 4541872 (1985-09-01), Jaffe
patent: 4758665 (1988-07-01), Spietschka et al.
patent: 4760144 (1988-07-01), Jaffe
patent: 4801702 (1989-01-01), Babler
patent: 4810304 (1989-03-01), Jaffe et al.

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