Dyes derived from aminothiophenes—Part 3. Application of some disperse dyes derived from 2-aminothiophenes to hydrophobic fibres

• Published in: Dyes and pigments Vol. 33; no. 3; pp. 215 - 228
• Main Authors: Hallas, Geoffrey, Towns, Andrew D.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 1997; Elsevier
• Subjects: 2-aminothiophenes; Applied sciences; Chemical industry and chemicals; disperse dyes; dyeing; Dyes, pigments; Exact sciences and technology; fastness properties; Heterocyclic azo dyes; Industrial chemicals; photostability; Heterocyclic azo dyes; disperse dyes; photostability; fastness properties; 2-aminothiophenes; dyeing; Thiophene derivatives; Sulfur heterocycle; Nylon; Azo dye; Dispersed dye; Ester polymer; Photochemical stability; Benzenic compound; Cellulose diacetate; Dying; Aminonitrile; Textile fiber
• ISSN: 0143-7208; 1873-3743
• DOI: 10.1016/S0143-7208(96)00049-6

A series of thienyl-2-azo dyes has been milled and the dispersions applied to polyester, nylon and cellulose diacetate by conventional exhaustion dyeing techniques. The colour properties of the dyeings were examined and related to the molecular structure of the colorants. Generally, of the three substrates, polyester was found to be coloured most effectively; the nylon and acetate dyeings had lower colour yields. Although the dyeings were not of standard depth, correlations between dye structure and wash, perspiration and sublimation fastness were identified. Photostability was observed to improve as electron-withdrawing groups were attached to the thiophene ring.