| 摘要 |
1485403 Dyeing polyester-cellulose blends HOECHST AG 16 Sept 1974 [15 Sept 1973] 40286/74 Heading DIB Textile materials comprising polyester-cellulose fibre blends are dyed by padding the material with an aqueous solution of at least one ice-colour coupling component, an alkaline agent and an alkali metal nitrite, optionally drying the material, cross-padding the material with an aqueous solution dispersion or emulsion of a diazotisable amine suitable for ice-colour dyeing and which has a maximum grain size of 0.03 mm containing a thermosolizable disperse dye and an acidic agent at room temperature and then successively allowing or causing formation of the azo dye product on the fibres and fixing the disperse dyestuff by subjecting the material to an elevated temperature. The coupling component is preferably an arylamide of acetoacetic acid, a 2-hydroxynaphthalene-3-carboxylic acid or a heterocyclic o-hydroxy carboxylic acid, and the amines used include nitranilines, aminosulphonic acid amides, amino-nitriles, N-benzoylaminoanilines or diamino diphenyl. The amines may be applied in presence of an anionic, nonionic or cationic dispersing agent and the acidic agents include formic, acetic, glycolic, lactic, gluconic, tartaric or citric acids, monosodium dihydrogen phosphate, sodium hydrogen sulphate or aluminium sulphate. The formation of azo dye is promoted by elevated temperature treatment and the disperse dye is fixed by the thermosol process. The dyeing process may be continuous.
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