Sulphur dyestuffs which are ready for dyeing, and processes for

Details Sulphur dyestuffs which are ready for dyeing, and processes for Sulphur dyestuffs which are ready for dyeing, and processes for

1980-02-22

1981-02-24

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Organic additive for dye composition, dye composition...

Sulfur-containing

8652, C09B 4900, D06P 130

Patent

active

042525330

ABSTRACT:
Dyeing and printing with sulfur dyestuffs involves dissolving the dyestuff by reduction. The dissolved reduced dyestuff is applied to the material to be dyed or printed and the dyestuff is reconverted into in soluble dyestuff by oxidation. The present invention improves the prior art by using as the dyestuff reducing agent a compound of the formula ##STR1## or an alkali metal salt thereof, wherein R is --H or --OH and R' is --H, --CH.sub.3 or --CH.sub.2 OH.

REFERENCES:
patent: 2130415 (1938-09-01), Buchanan
patent: 2558245 (1951-06-01), Grant
patent: 3329477 (1967-07-01), Mason et al.
patent: 3645665 (1972-02-01), Etters
patent: 3798172 (1974-03-01), Etters

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