Patent ID: 7166158
Filing Date: 2007-01-23
Classification: C09B,C09D

Abstract:
1. A quinacridone pigment composition comprising (a) at least one symmetrical quinacridone of formula (b) at least one unsymmetrical quinacridone of formula and (c) at least one symmetrical quinacridone of formula in which R R R at least one of R at least one of the positions of R with the proviso that the unsymmetrical b) quinacridone is not 1,10-dimethylquinacridone or 1,10-dichloroquinacridone and comprising from 65 to 95% by weight of at least one symmetrical component of formula (1), and from 5 to 35% by weight of the sum of at least one unsymmetrical component of formula (2) and at least one symmetrical component of formula (3), based on the total weight of the components of formulae (1), (2) and (3) in the composition.