Pyridone dyes, a process for the preparation and their use in the production of coloured plastics or polymeric colour particles

• Main Authors: Lauk, Urs, Tzikas, Athanassios, Dreier, Romeo, Clement, Antoine
• Format: Patent
• Language: English
• Published: 22.07.2004

The present invention relates to pyridone dyes of formula (1), wherein R is a radical -(CR′H) n -W, R′ is hydrogen, C 1 -C 2 alkyl or phenyl, Y is cyano, -CONH 2 or -CH 2 SO 3 H, W is hydrogen, a radical -NR 1 R 2 or a radical -OR 3 , R 1 and R 2 are each independently of the other hydrogen, unsubstituted or hydroxy- or phenyl-substituted C 1 -C 6 -alkyl, it being possible for the alkyl chain from C 3 upwards to be interrupted by one or more oxygen atoms, or a radical of formula (3), (4) or (5), or R 1 and R 2 together with the nitrogen atom in -NR 1 R 2 form a heterocyclic ring, R 3 is hydrogen, unsubstituted or hydroxy-substituted C 1 -C 6 alkyl, phenyl or a radical of formula (6), R 4 is alkyl or aryl, R 5 and R 6 are each independently of the other alkyl, aryl or heteroaryl, n is an integer from 2 to 6, and m is an integer from 1 to 6, a process for the preparation thereof and their use in the production of coloured plastics or polymeric colour particles. 1