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US 4,813,970 AGranted
Method for improving the lightfasteness of nylon dyeings using copper sulfonates
AssigneeCrompton & Knowles Corporation
InventorsAlexander S. Kirjanov, Vincent W. Bannigan, Jr.
Life of this patent
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Abstract
This invention is directed to a method for the lightfastness enhancement of dyed nylon fibers by applying at least 10 ppm copper in the form of an alkyl, aryl, or alkyl-aryl copper sulfonate before, during, or after dyeing the nylon fibers.
Claims20
The method of improving the lightfastness of dyed nylon textile fibers which method comprises applying and drying a soluble copper sulfonate of the following formula ##STR5## onto the fibers from a solvent system or from an aqueous bath;
- the deposition of the soluble copper sulfonate being effected before, simultaneously with, or after the dye has been applied to the fibers.
Dependencies are inferred from the claim text.