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REACTIVE DYES CONTAINING (N-METHYL-β-SULFOETHYLAMINO) ETHYLSULFONYL GROUPS FOR SILK FIBRES

Silk dyeing with several classes of reactive dyes was studied. A class of reactive dyes containing (N-methyl-β-sulfoethylamino) ethylsulfonyl groups for silk is presented. A new method for introducing such a reactive group and a kinetic studies on the reaction mechanism involved are proposed. A kinetic isotopic effect on dyeing mechanism with silk is discussed and the optimum dyeing techniques recommended. Dyeing or printing was carried out in neutral media; brilliant shades, good fastness, high fixation and excellent storage stability are given.
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