Enzymatic methods for dyeing with reduced vat and sulfur dyes

Details Enzymatic methods for dyeing with reduced vat and sulfur dyes Enzymatic methods for dyeing with reduced vat and sulfur dyes

1998-11-24

1999-09-07

Gupta, Yogendra

Bleaching and dyeing; fluid treatment and chemical modification

Using enzymes, dye process, composition, or product of dyeing

8436, 8111, 8404, 8602, 8613, 8650, 8652, 8653, 8917, 8921, 8922, 8924, 8927, 435263, D06P 100, D06P 130, D06P 122, D06P 124

Patent

active

059481226

ABSTRACT:
The present invention relates to methods for dyeing a material, comprising (a) treating the material with a dyeing system which comprises one or more reduced vat dyes and/or one or more reduced sulfur dyes; and (b) oxidizing the one or more reduced vat dyes or one or more reduced sulfur dyes adsorbed onto the treated material with an oxidation system comprising (i) an oxygen source and one or more enzymes exhibiting oxidase activity or (ii) a hydrogen peroxide source and one or more enzymes exhibiting peroxidase activity, to convert the one or more reduced dyes to their original oxidized insoluble colored forms; wherein the material is a fabric, yarn, fiber, garment or film made of cotton, diacetate, flax, fur, hide, leather, linen, lyocel, polyacrylic, polyamide, polyester, ramie, rayon, silk, tencel, triacetate, viscose or wool.

REFERENCES:
patent: 3176325 (1965-04-01), Aspland
patent: 3957424 (1976-05-01), Zeffren et al.
patent: 4011042 (1977-03-01), Stitzel
patent: 4036586 (1977-07-01), Rowe
patent: 4131423 (1978-12-01), Kato
patent: 4756037 (1988-07-01), McFadyen et al.
patent: 5378246 (1995-01-01), Gurley
patent: 5435809 (1995-07-01), Holst et al.

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