Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
C106S031770, C106S497000, C524S090000, C544S049000, C544S056000
The invention is directed to a method or use of 2,9-dichloro-quinacridone as a crystal phase inhibitor during the beta-quinacridone or gamma-quinacridone crude pigment particle size reduction processes. 2,9-dichloroquinacridone is added to the milling composition of the crude gamma or crude beta quinacridone.
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Ciba Specialty Chemicals Corporation
Green Anthony J.
Loggins Shiela A.
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