Process for preventing color migration in colored moldings of po

Details Process for preventing color migration in colored moldings of po Process for preventing color migration in colored moldings of po

1980-12-19

1982-05-25

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Color protecting process for dyed product

8506, 8582, 8583, D06P 502

Patent

active

043314392

ABSTRACT:
This invention deals with the coloring or dyeing of polyoxymethylene resins and particularly with preventing color migration therein. Color migration in molded articles of colored polyoxymethylene resins is prevented by dyeing the articles with disperse dyes, and treating the articles with a compound having one or more isocyanate groups, for example, a urethane prepolymer.

REFERENCES:
patent: 3134636 (1964-05-01), Singleton
patent: 4029467 (1977-06-01), Defago et al.

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