Diarylide yellow pigments

Details Diarylide yellow pigments Diarylide yellow pigments

2009-04-17

2011-10-11

Green, Anthony (Department: 1731)

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

C106S031600, C106S031810, C524S190000, C534S561000, C534S588000

Reexamination Certificate

active

08034174

ABSTRACT:
A diarylide yellow pigment formed by a coupling reaction of a benzidine and a mixture comprising 4-chloro-2,5-dimethoxy-acetoacetanilide and 2,4-dimethyl-acetoacetanilide. The diarylide yellow pigment has a desirable reddish shade than C.I. Pigment Yellow 83, exists in a solid solution, and contains fewer aromatic amine impurities.

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