Patent ID: 7377974
Filing Date: 2008-05-27
Classification: C09D,G03G

Abstract:
1. A method for pigmenting an electrophotographic toner, electrophotographic developer, ink, aqueous binder system or color filter comprising the step of adding to the electrophotographic toner, electrophotographic developer, ink, aqueous binder system or color filter a pigment preparation comprising C.I. Pigment Yellow 74 as base pigment and one or more pigment dispersants, wherein the one or more pigment dispersants are selected from the group consisting of C.I. Pigment Yellow 61, 61:1, 62, 62:1, 168, 169, and 191:1, or a combination of compounds of the formula (IV) and (V) wherein R E a phosphonium ion; or an unsubstituted or substituted ammonium ion.