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

Abstract

The present invention relates to pyridone dyes of formula (1), wherein R is a radical —(CR′H)n—W, R′ is hydrogen, C1-C2alkyl or phenyl, Y is cyano, —CONH2 or —CH2SO3H, W is hydrogen, a radical —NR1R2 or a radical —OR3, R1 and R2 are each independently of the other hydrogen, unsubstituted or hydroxy- or phenyl-substituted C1-C6-alkyl, it being possible for the alkyl chain from C3 upwards to be interrupted by one or more oxygen atoms, or a radical of formula (3), (4) or (5), or R1 and R2 together with the nitrogen atom in —NR1R2 form a heterocyclic ring, R3 is hydrogen, unsubstituted or hydroxy-substituted C1-C6alkyl, phenyl or a radical of formula (6), R4 is alkyl or aryl, R5 and R6 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

Dependencies are inferred from the claim text.