Process for dyeing acid-modified polyester fibers

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

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8 21C, 8 37, 8163, 8179, C09B 2700, D06P 102

Patent

active

039778274

ABSTRACT:
A process for dyeing acid-modified polyester fibers comprising contacting the fibers with a dye bath containing a thiazoleazo-type cationic dye of the formula (I), ##SPC1##
wherein R.sub.1 and R.sub.2 each is a methyl group or an ethyl group; A and B each is a benzene nucleus which can be substituted with a methyl group, an ethyl group, a methoxy group or an ethoxy group; and X.sup.- is an anion. The cationic dye compounds of the formula (I) dye acid-modified polyester fibers a bright blue shade and with good light fastness.

REFERENCES:
patent: 3504997 (1970-04-01), Clapham
patent: 3874847 (1975-04-01), Ohkawa et al.

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