Dyeing methods

Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning

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Details

8 1E, 8 1G, 8 1H, 8 39R, 8 41R, 8 54, 8 93, 8102, 8128A, 8163, 8165, D06P 138, D06P 314

Patent

active

040638774

ABSTRACT:
The invention is concerned with a change in the current practice of dyeing natural and synthetic polyamide materials with reactive dyestuffs. The invention involves pre-treating the material to be dyed with an amphoteric auxiliary in a bath which is brought rapidly to the later dyeing temperature and which contains an amphoteric auxiliary preferably at a pH buffered within a specific range. It is found that the pre-treated material takes on the reactive dyestuff very readily and that the dyed materials have a good fastness. A major achievement is that the dyeing time is cut to about one-half of that presently employed.

REFERENCES:
patent: 3627475 (1971-12-01), Baumann
Schwartz et al., "Surface Active Agents and Detergents" vol. 2., (Interscience, 1958) pp. 271-272, 591-595.
Textile Chemist and Colorist, Sept. 1969, vol. 1, No. 20A, p. 253.

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