Bleaching and dyeing; fluid treatment and chemical modification – Treatment of hides – skins – feathers and animal tissues – Tanning
Patent
1973-04-10
1976-05-11
Sebastian, Leland A.
Bleaching and dyeing; fluid treatment and chemical modification
Treatment of hides, skins, feathers and animal tissues
Tanning
8 41C, 260207, 2602071, C09B 2700, C09B 4548, D06P 100, D06P 300
Patent
active
039559190
ABSTRACT:
Mixtures of water-insoluble monoazo dyestuffs are disclosed together with the dyeing, padding or printing of polyester material therewith.
The water-insoluble monoazo dyestuffs of the following general formula (A) ##SPC1##
in which Y represents hydrogen, chlorine, bromine, methyl, ethyl, methoxy, ethoxy or cyano; R.sub.1 represents methoxy, ethoxy or phenoxy; R.sub.2 represents methyl or ethyl; R.sub.3 represents hydrogen, methyl, ethyl, cyanoethyl or allyl; and R.sub.4 represents methyl, ethyl, propyl, butyl, allyl or phenyl, are suitable for the production of inexpensive navy shades of good fastness to light, washing, perspiration, sublimation and heat setting; however, difficulties sometimes arise in the case of these dyestuffs.
The improvement disclosed comprises overcoming said difficulties and providing new navy shades by using a mixture of at least two dyestuffs, in one of which the Y constituent above is hydrogen and in the other of which the Y constituent is replaced by constituent X which represents chlorine, bromine, methyl, ethyl, methoxy, ethoxy or cyano.
REFERENCES:
patent: 3533722 (1970-10-01), Wegmuller
patent: 3621009 (1971-11-01), Ono et al.
Aiga Hiroshi
Fujii Fumio
Mukai Ken
Watanabe Tetsuo
Gron T. S.
Mitsui Toatsu Chemicals Incorporated
Sebastian Leland A.
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