Process for making acid dye stain-resistant fibers
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United States of America Patent
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Oct 3, 2006
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app pub date -
Aug 26, 2003
filing date -
Oct 22, 1997
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Abstract
Acid dye stain-resistant fibers which are formed from a polyamide composition containing a mixture of a masterbatch concentrate, a fiber-forming polyamide and a polymer, the masterbatch concentrate including a carrier and a reagent having the formula: ##STR00001## wherein Q and Z are moieties which associate with free acid dye sites in the polyamide, a is an integer from 0 to 2, b is an integer from 1 to 4, and R is an alphatic, aromatic or alicydic hydrocarbyl group. The carrier can be a terpolymer, a semi-crystallic thermoplastic polyester or plyamide having a melting point of about 235.degree. C. or less, or mixtures thereof.
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