| 摘要 |
1498067 Dyeing and printing blends of fibres CIBA-GEIGY AG 27 March 1975 [28 March 1974] 13020/75 Heading D1B Mixed fabrics made from fibre mixtures dyeable with disperse and reactive dyes are pad-dyed or printed with pad liquors or print pastes in which the disperse dye being of the azo type is prepared by mixing a coupling component in the presence of alkali with a pasting agent followed by dissolving in water optionally in presence of an anionic or nonionic dispersing agent; the diazo component then being added to form the dispersed azo dye followed by additions of thickening agent and reactive dye. Blends of fibres which may be dyed are, polyester/wool, polyester/ cellulose, preferably polyester/cotton. Pure red shades of enhanced brilliantcy may be obtained by this method. Coupling components employed may be hydroxypyridones e.g. as specified in British Specification 1437204.
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