Patent ID: 6635346
Filing Date: 2003-10-21
Classification: D01F,Y10T

Abstract:
An acid dye stain-resistant fiber or fibers formed from a polyamide composition comprising a combination of a masterbatch concentrate, a fiber-forming polyamide and a polymer, said masterbatch concentrate comprising a reagent and a carrier therefor, wherein said reagent has the formula: wherein: Q and Z are moieties which associate with free acid dye sites in said polyamide;a is an integer from 0 to 2; b is an integer from 1 to 4; and R is selected from the group consisting of aliphatic, aromatic or alicyclic hydrocarbyl groups; and said carrier is selected from the group consisting of: (A) a terpolymer comprising from about 56% to about 94.5% by weight of at least one alpha-monoolefin having 2 to 8 carbon atoms, about 5% to about 40% by weight of an ethylene-&agr;, &bgr; unsaturated carboxylic acid (1) C1-C4 alkyl or (2) glycidyl ester and from about 0.5% to about 4.0% by weight of an internal anhydride of an ethylenically unsaturated carboxylic acid; (B) a semi-crystalline thermoplastic polyester having a melting point of about 235Â° C. or less; (C) a semi-crystalline thermoplastic polyamide with a melting point of about 235Â° C. or less; and (D) mixtures thereof; and further wherein said polymer is selected from the group consisting of (A) and mixtures of (A) with at least one of (B) and (C), wherein the percentage by weight in said polymer of internal anhydride of an ethylenically unsaturated carboxylic acid is in the range of from about 0.5% to about 4.0%.