Process for the dyeing of thermoplastics

Details Process for the dyeing of thermoplastics Process for the dyeing of thermoplastics

1976-06-18

1978-04-11

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 4, 8 89R, 8 92, 8168D, 8169, 8179, 8180, C09B 4500, D06P 300

Patent

active

040836878

ABSTRACT:
Process for dyeing thermoplastics having no reducing action, in which process there are used Mg, Zn, Cd and Ni salts of azo dye sulphonic acids of the formula ##STR1## wherein A represents a phenyl or naphthyl group optionally substituted by halogen atoms, by alkyl or alkoxy groups containing 1 - 4 C atoms, or by trifluoromethyl groups, X represents a hydrogen atom or a carboxy group, and n represents the number 1 or 2.
The resulting dyeings are characterized by excellent fastness properties, especially fastness to light and to migration.

REFERENCES:
patent: 2694055 (1954-11-01), Ludwig et al.

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