Azo pigments

Details Azo pigments Azo pigments

2005-03-29

2005-03-29

Green, Anthony J. (Department: 1755)

Compositions: coating or plastic

Materials or ingredients

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

C047S057600, C106S031770, C349S106000, C430S007000, C430S108230, C524S092000, C534S579000, C534S801000

Reexamination Certificate

active

06872245

ABSTRACT:
This invention relates to azo pigments of general formula (I) wherein D represents the radical of a diazo component; R1and R2are the same or different and represent hydrogen, a C1-C4alkyl radical which is optionally substituted by hydroxy, amino, halogen or methoxy, or a (C6-C10) aryl radical which is optionally substituted by one, two or three substituents from the group C1-C4alkyl, C1-C4alkoxy, F, Cl, Br, CF3, NO2, OH, CONH2, CONH(C1-C4alkyl), CON(C1-C4alkyl)2, COO(C1-C4alkyl), SO2NH2, SO2NH(C1-C4alkyl) and SO2N(C1-C4alkyl)2, provided that R1and R2do not simultaneously represent hydrogen; R4represents hydrogen, C1-C4alkyl, halogen, trifluoromethyl, C1-C4alkoxy, NO2, or CN; and n represents 1, 2 or 3

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