Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning
Patent
1976-12-27
1979-07-10
Higel, Floyd D.
Bleaching and dyeing; fluid treatment and chemical modification
Treatment of hides, skins, feathers and animal tissues
Tanning
260153, 260154, 260155, 8 25, 8 28, 8 27, 546285, C09B 2700, C09B 4600, D06P 110, D06P 370
Patent
active
041606434
ABSTRACT:
A mixture of water soluble cationic azo dyestuffs devoid of carboxylic acid or sulphonic acid groups, each dyestuff in said mixture containing at least one cyclammonium group and said dyestuffs differing only in the constitution of the said cyclammonium group, said cyclammonium group being a gamma-picolinium group in one dyestuff and a beta-picolinium group in another dyestuff in said mixture, the water-solubility of said mixture being superior to that of the individual dyestuffs, the mixture being particularly useful for the coloration of polymers and copolymers of acrylonitrile.
REFERENCES:
patent: 3948598 (1976-04-01), Okaniwa et al.
patent: 3958287 (1976-05-01), Okaniwa et al.
Higel Floyd D.
Imperial Chemical Industries Limited
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