Stable liquid aqueous composition of a water-soluble fiber-react

Details Stable liquid aqueous composition of a water-soluble fiber-react Stable liquid aqueous composition of a water-soluble fiber-react

1977-06-17

1978-10-03

Higel, Floyd D.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 41R, 8 41B, 8 42R, 8 42B, 8 50, 8 51, 8 76, 8 82, 8 83, 8 92, 8163, 260151, 260153, 260154, 260162, 260163, 260193, 260199, D06P 138, D06P 1382, D06P 1384

Patent

active

041181840

ABSTRACT:
Concentrated dyeing compositions containing up to 45% by weight of one or more metal-free or metal complex azo dyestuffs containing one or more sulfo groups and one or more reactive groups, and containing buffer substances and having a pH of from 3 to 7, which may easily be prepared by diazotization and coupling of stoichiometrical amounts of a diazotizable amino compounds with a stoichiometrical amount of a nitrite and with a coupling component without addition of an acid but with the proviso that at least the diazo or coupling component contain at least one free acid group, such as sulfo group; these compositions are salt-free or practically salt-free and are very well suitable for the preparation of usual dyeing liquors and printing pastes useful in dyeing wool, silks, polyamide fibers and natural or regenerated cellulose.

REFERENCES:
patent: 3100131 (1963-08-01), Freyermuth et al.
patent: 3387914 (1968-06-01), Bohnert et al.
patent: 3416876 (1968-12-01), Ohmer
patent: 3793305 (1974-02-01), Balon
patent: 4035350 (1977-07-01), Landler et al.
Bermes, Chemical Abstracts, vol. 77, #76664e (1972).
Raufmann, Chemical Abstracts, vol. 76, 128686q (1972).
Lacroix et al., Chemical Abstracts, vol. 81, 14620m (1974).
Vernikovskaya, Chemical Abstracts, vol. 76, #128797b (1972).

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