A. T. Peters, M. Bide
1986
Citations
0
Influential Citations
25
Citations
Journal
Dyes and Pigments
Abstract
Abstract 4-Amino- and 3-amino-1,8-naphthalic anhydrides, diazotised and coupled to N-β-hydroxyethyl-N-β-cyanoethylaniline, afford 4- and 3-[4-(N-β-hydroxyethyl-N-β-cyanoethyl)aminophenylazo]-1,8-naphthalic anhydrides. These intermediates, and their 0-acetyl derivatives, were condensed with amines and o-diamines to give orange to bluish-red dyes of excellent fastness to sublimation on polyester. Dyes derived from 4-amino-1,8-naphthalic anhydrides absorb at 50–60 nm longer wavelengths than related 3-amino based isomers and have better light fastness. The dyes are also suitable for the colouration of cellulose secondary acetate, cellulose tri-acetate and polyamide.