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US 5,045,083 AGranted
Light-fast dyeing of synthetic polyamide fibers: anionic dye, oxazolo-anilide and a copper complex
AssigneeSandoz Ltd.
InventorBrian Bennett
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Abstract
The present invention relates to a process for dyeing polyamide comprising a) one or more oxanilide U.V. absorbers (hereinafter defined as component a); b) one or more copper complexes, (hereinafter defined as component b); and c) one or more metal-free or metallized acid dyes in particular 1:2 metal complex dyes (hereinafter defined as component c) optionally together with one or more dyeing assistants.
Claims39
A process for dyeing polyamide which comprises applying thereto the following components a), b) and c):
- a) one or more oxanilide U.V. absorbers;
- b) one or more copper complexes of .alpha.-hydroxy-C.sub.2-6 alkylene carboxylic acids;
- and
- c) one or more metal-free acid dyes and/or metal complex dyes.
1 more element
An aqueous dispersion comprising
- a) one or more oxanilide UV absorbers and
- b) one or more copper complexes of .alpha.-hydroxy-C.sub.2-6 alkylene carboxylic acids,
- said dispersion containing 90 to 20% of a) and 10 to 80% of b) based on the total combined weights of a) and b).
Dependencies are inferred from the claim text.