Anthraquinone-azo dyes

Details Anthraquinone-azo dyes Anthraquinone-azo dyes

2006-04-18

2006-04-18

Powers, Fiona T. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

C524S099000, C524S102000

Reexamination Certificate

active

07030229

ABSTRACT:
The present invention relates to an azo dye of formula I, II or III: (formula I, II or III); wherein R1and R2are each independently of the other one or more divalent groups selected from alkylene, arylene, aralkylene and cycloalkylene, which may be interrupted by —O—, —S—, —NH—, —NR8—, —COO—, —CONH— or —CONR9—, wherein R8and R9are alkyl or aryl, X is —O— or —NH—, R3is —CN or —CONH2, R4is methyl or trifluoromethyl and R5, R6, R7and R8are each independently of the others hydrogen, halogen or —CN, to a process for the preparation thereof and to the use thereof in a method of producing mass-colored plastics or polymeric color particles.

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K. Tsuda, Displays, vol. 14, No. 2, (1993), pp. 115-124.

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