Aqueous dyestuff formulation, a process for its preparation and

Details Aqueous dyestuff formulation, a process for its preparation and Aqueous dyestuff formulation, a process for its preparation and

1981-04-01

1982-09-07

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Dye concentrate composition wherein an additional amount of...

8639, 8641, 8673, 8918, 8919, D06P 6700, C09B 6700

Patent

active

043482040

ABSTRACT:
The aqueous dyestuff formulation of an tetrakisazo direct dyestuff which is stable to alkali and contains at least one aromatic hydroxyl group and/or enol group and at least one group conferring solubility in water, or a mixture of such azo direct dyestuffs, is characterized in that it has a pH value equal to or greater than 12 and is prepared by mixing an azo direct dyestuff which is stable to alkali, water and a tertiary alkali metal phosphate and/or alkali metal metasilicate and/or alkali metal hydroxide, and by choosing the proportions such that the dyestuff formulation contains 5 to 50% by weight of dyestuff and has a pH value equal to or greater than 12. The dyestuff formulation is used, after dilution with water, for dyeing and printing natural or synthetic materials containing hydroxyl groups.

REFERENCES:
patent: 1981027 (1934-11-01), Briggs et al.
patent: 2489463 (1949-11-01), Reynolds
patent: 3551088 (1970-12-01), Kesler et al.
patent: 3957425 (1976-05-01), Tullio
patent: 4118182 (1978-10-01), Smith

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