Greenish-yellow pyridone dyes with improved light fastness - for polyesters, acrylonitrile polymers and cellulose acetate

摘要

The novel pyridone dyes are of formula (I) (where n = 0, 1 or 2; B is a gp. of formula X-NH-Z or COO-(A-O)m X1;R1 is 1-3C alkyl; Y is Cl or Br; X is CO or SO2; X1 is C6H5, C6H5 CH2, C6H5-CH2-CH2, C6H5-O-CH2-CH2, ClC6H4 CH3-C6H4, Cl2C6H3, (CH3)2C6H3, Cl-C6H4-O-CH2-CHi or Cl2C6H3-O-CH2-CH2; Z is aralkyl interrupted by one or more O atoms; A is CH2-CH2 or CH(CH3)CH2; m = 1 or 2; R is H, 1-8C alkyl, 2-8C alkyl substd. by OH or by 1-4C alkoxy, or cyclohexyl methylcyclohexyl, norbornyl, phenylethyl, phenoxyethyl or phenoxypropyl; R is H when B is CO-NH-Z). As greenish-yellow dyes for polyesters and also for acrylonitrile polymers and cellulose esters, having excellent fastness to light moisture and heat-fixing. Intensity of colour, uniformity and other tinctorial props. are also very good.