Patent ID: 7828886

Claim:
Anthrapyridone dyes of general formula (III) wherein X represents hydrogen, chloro, bromo or an unbranched or branched alkyl group each having from 1 to 8 carbon atoms; R 1 represents hydrogen or an unbranched or branched alkyl group each having from 1 to 8 carbon atoms; R 2 represents hydrogen, SO 3 M, chloro, bromo, an unsubstituted or substituted alkoxy group having up to 12 carbon atoms, where the substituents are selected from the group consisting of COOM, OH, OCH 3 , halogen, COOCH 3 and COOCH 2 CH 3 , or a substituted aromatic aryloxy group, where the substituents are selected from the group consisting of COOM, SO 3 M, OCH 3 , halogen, COOCH 3 and COOCH 2 CH 3 ; R 3 , R 4 independently represent hydrogen, fluoro, chloro, bromo, NH 2 , an alkyl group or an alkoxy group each having from 1 to 6 carbon atoms, an unsubstituted aliphatic amide group or sulphonamide group each having up to 12 carbon atoms, or an unsubstituted or substituted aromatic amide group or sulphonamide group each having up to 20 carbon atoms, where the substituents are selected from the group consisting of COOM, SO 3 M, OCH 3 , CH 3 , CH 2 CH 3 , Cl, Br, COOCH 3 and COOCH 2 CH 3 ; n is 0, 1 or 2 and M represents hydrogen, a metal cation or an ammonium cation, optionally substituted by one or more alkyl groups or substituted alkyl groups or hydroxyalkoxyalkyl groups each having from 1 to 18 carbon atoms.