Liquid compositions of prereduced sulfur dyes and production the

Details Liquid compositions of prereduced sulfur dyes and production the Liquid compositions of prereduced sulfur dyes and production the

1988-02-01

1990-04-17

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Dye or potential dye composition, additive, treatment,...

Sulfur dye or vat dye

8527, 8650, 8651, 8918, C09B 4900, C09B 6728

Patent

active

049177060

ABSTRACT:
Liquid compositions of sulfur dyes in reduced form are obtained by reducing a sulfur dye in an alkaline medium to which no sulfide reducing agent has been added, preferably employing a reducing sugar as reducing agent and a sulfur dye which has been washed to remove inorganic salts therefrom.

REFERENCES:
patent: 2174486 (1939-09-01), Chambers et al.
patent: 3532455 (1970-10-01), Randvere
patent: 4218219 (1980-08-01), Nagl et al.
patent: 4252533 (1981-02-01), Heid et al.
patent: 4300904 (1981-11-01), Blanchard
patent: 4322214 (1982-03-01), Manabe et al.
H. Zollinger, "Color Chemistry", (VCH), 1987, pp. 197-201.

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