Method for temporarily coloring article with acid labile coloran

Details Method for temporarily coloring article with acid labile coloran Method for temporarily coloring article with acid labile coloran

1990-10-01

1991-12-10

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Fugitive dye composition, process or product

8636, 8917, 8918, 8924, D06P 513

Patent

active

050714406

ABSTRACT:
An article may be temporarily colored by application of an aqueous solution of a polyoxyalkylene substituted chromophore characterized by a N.dbd.pair with an electron withdrawing group bonded to one element of the pair and an electron donating group bonded to the opposite element. The polyoxyalkylene substituent imparts solubility to the colorant and bulk to prevent penetration into interstices in the article being colored. The colorant may be subsequently decolorized in hydrolysis when an aqueous acid solution is applied to the colorant.

REFERENCES:
patent: 3157633 (1964-11-01), Kuhn
patent: 4167510 (1979-09-01), Brendle
patent: 4400320 (1983-08-01), Keller et al.
patent: 4846846 (1989-07-01), Rekers et al.
patent: 4877411 (1989-10-01), Himes et al.

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