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US 4,231,747 AGranted
Shrinkproofing wool with copper salts of carboxylic acids
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsNathan H. Koenig, Mendel Friedman
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Abstract
Proteinaceous fibers are modified by first contacting the fibers with an aqueous solution of a cupric salt of a carboxylic acid containing from 2-18 carbon atoms and then contacting the so-treated fibers with a hot, semipolar, water-miscible organic solvent. The modified fibers exhibit increased resistance to shrinkage.
Claims13
A process for shrinkproofing proteinaceous fibers, which comprises
- (a) contacting the fibers with an aqueous solution of a cupric salt of a carboxylic acid containing from 2 to 18 carbon atoms at a temperature and concentration and for a period of time sufficient to enhance the shrinkage properties of the fibers, and
- (b) contacting the fibers of step a with a semipolar, water miscible organic solvent at a temperature and in an amount and for a period of time sufficient to shrinkproof the fibers.
Dependencies are inferred from the claim text.