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Title: Synthesis of 2-bisazo-3-substituted benzo[b]thiophenes and their application on polyester-fibres as disperse dyes
Authors: Rangnekar, D W
Jhaveri, P V
Keywords: Benzo[b]thiophenes;Bisazo dyes;Disperse dyes;Polyester fibre
Issue Date: Mar-1990
Publisher: NISCAIR-CSIR, India
Abstract: Ethyl 2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate and 2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carbonitrile obtained by the condensation of cyclohexanone and sulphur with cyanoethylacetate and malononitrile respectively were diazotized and coupled with ɑ-naphthylamine and the resulting aminomonoazo compounds were further diazotized and coupled with various couplers to give 2-bisazo-3-substituted benzo[b]thiophenes. These bisazo dyes when applied on polyester as disperse dyes gave red brown and blue shades with poor to moderate light fastness and good sublimation fastness.
Page(s): 26-29
ISSN: 0975-1025 (Online); 0971-0426 (Print)
Appears in Collections:IJFTR Vol.15(1) [March 1990]

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