Patent ID: 6494947
Filing Date: 2002-12-17
Classification: C09B

Abstract:
A pigment composition comprising pigments of formulae wherein R1, R2, R3 and R4 are each independently of one another hydrogen, chlorine, bromine, cyano, trifluoromethyl, C1-C8alkyl, C1-C8alkoxy or C1-C8alkylthio, wherein the pigments of formulae (I) and (II) have their own separate crystalline phases and at least one pigment of formula (I) or (II) is 1,4-diketo-2,5-dihydro-3,6-di(4â€²-chlorophenyl)pyrrolo-[3,4c]pyrrole or 2,9-dichloroquinacridone kneaded with a crystalline inorganic salt and a neutral organic liquid.