Azo pigments

US6872245B2 · kind B2 · utility

Assignee

• Clariant Corporation · DE

Inventors

• Felix Grimm · Königsee, DE
• Hans Joachim Metz · Darmstadt, DE
• Andreas Wacker · Plochingen, DE

Key dates

• Filing date: Jul 24, 2002
• Grant date: Mar 29, 2005
• Expiry date: Jul 24, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D239/96
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

This invention relates to azo pigments of general formula (I) wherein D represents the radical of a diazo component; R1 and R2 are the same or different and represent hydrogen, a C1-C4 alkyl 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-C4 alkyl, C1-C4 alkoxy, F, Cl, Br, CF3, NO2, OH, CONH2, CONH(C1-C4 alkyl), CON(C1-C4 alkyl)2, COO(C1-C4 alkyl), SO2NH2, SO2NH(C1-C4 alkyl) and SO2N(C1-C4 alkyl)2, provided that R1 and R2 do not simultaneously represent hydrogen; R4 represents hydrogen, C1-C4 alkyl, halogen, trifluoromethyl, C1-C4 alkoxy, NO2, or CN; and n represents 1, 2 or 3