Process to decolorize dye composition and method of use thereof

Details Process to decolorize dye composition and method of use thereof Process to decolorize dye composition and method of use thereof

1986-07-25

1988-02-02

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Dye concentrate composition wherein an additional amount of...

8510, 8512, 8515, 8516, 8580, 8583, 8584, 8922, 8924, 8926, 8927, C09B 6700

Patent

active

047227389

ABSTRACT:
A waterless dye composition for apparel and other articles, made from thermoplastic materials, comprises an aliphatic polyester of a higher alkanoic acid and a polyol, of the formula (ACOO).sub.2-6 B, wherein A is alkyl of 8-22 carbon atoms and B is the residue of a polyhydric alcohol, other than glycerol, of 2-6 hydroxyl groups and an organic colorant. The compositions can further comprise an aromatic polyester of the formula C.sub.6 H.sub.z' --COOR.sub.1).sub.z, wherein z is 3, 4, 5, or 6; z' is 6-z; and R.sub.1 is higher alkyl; and/or a cycloaliphatic diester of the formula ##STR1## wherein R is substituted or unsubstituted straight or branched chain alkyl of 4-20 carbon atoms, polyoxyalkylene of the formula HO(C.sub.x H.sub.y O).sub.n C.sub.x H.sub.y --or phosphated polyoxyalkylene of the formula (HO).sub.2 P(.dbd.O)O(C.sub.x H.sub.2x O).sub.n C.sub.x H.sub.2x or a salt thereof, wherein (C.sub.x H.sub.2x O).sub.n is (CH.sub.2 CH.sub.2 O).sub.n, (C.sub.3 H.sub.6 O).sub.n or (CH.sub.2 CH.sub.2 O).sub.p (C.sub.3 H.sub.6 O).sub.q, n is 2-22, and the sum of p+q is n.
A process for coloring apparel or other articles, fabricated from polyester, polyamide, polyurethane, acrylic, halogenated polyolefin or epoxy plastic, comprises exposing an article to the foregoing compositions, maintained at a temperature between 100.degree. C. and the temperature at which the plastic is degraded, for a time adequate to achieve the desired degree of coloration.
The compositions may further be diluted with water and used for textile finishing processes or as dyeing assistants in aqueous baths.

REFERENCES:
patent: 4293305 (1981-10-01), Wilson
patent: 4394126 (1983-07-01), Wilson
patent: 4426297 (1984-01-01), Wilson
patent: 4529405 (1985-07-01), Wilson
patent: 4581035 (1986-04-01), Wilson
patent: 4602916 (1986-07-01), Wilson
patent: 4608056 (1986-08-01), Wilson
patent: 4609375 (1986-09-01), Wilson et al.

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