Process for the dyeing of thermoplastics

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

C - Chemistry, Metallurgy

08

J

400/1800, 8/3, 4

C08J 3/20 (2006.01) C08K 5/42 (2006.01) C09B 63/00 (2006.01)

Patent

CA 1083287

PROCESS FOR THE DYEING OF THERMOPLASTICS Abstract of the Disclosure Process for mass dyeing and melt colouring of thermo- plastics having no reducing action, in which process there are used Mg, Zn, Cd and Ni salts of azo dye sulphonic acids of the formula Image 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 characterised by excellent fastness properties, especially fastness to light and to migration.

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