Sulfur dye compositions and their production

Details Sulfur dye compositions and their production Sulfur dye compositions and their production

1992-10-02

1995-11-28

Einsmann, Margaret

Bleaching and dyeing; fluid treatment and chemical modification

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

Sulfur dye or vat dye

8650, 8607, 8611, C09B 4900

Patent

active

054703565

ABSTRACT:
A sulfur dye or sulfurized vat dye is treated in an aqueous reducing medium, preferably an aqueous mixture of alkali and reducing sugar, to form a solution which is then oxidized to form particles of the dye having improved characteristics.

REFERENCES:
patent: 665737 (1901-01-01), Haussmann
patent: 1095237 (1914-05-01), Schmidt
patent: 2893994 (1959-07-01), Helfaer
patent: 4917706 (1990-04-01), Meszaros
patent: 4992078 (1991-02-01), Meszaros
D. G. Orton in Venkataraman's "The Chemistry of Synthetic Dyes", vol. VII, (Academic Press), 1974, p. 33.

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