Process for providing polyamide materials with stain resistance
AssigneeMinnesota Mining and Manufacturing Company
InventorShou-Lu G. Wang
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Abstract
A method for imparting to fibrous polyamide materials stain resistance to acid colorants is provided. The method comprises (a) applying by immersion or padding of said material or applying to the fiber during spinning thereof 0.01 to 0.3 weight percent based on the weight of said polyamide material of a stain resist agent and (b) applying sufficient stain resist agent by foam application to provide a stain resistance rating of at least about 5.
Claims9
A method for imparting to fibrous polyamide materials stain resistance to acid colorants comprising (a) applying by immersion or padding of said material or applying to the fiber during spinning thereof 0.01 to 0.3 weight percent based on the weight of said polyamide material of a stain resist agent selected from the group consisting of (i) a partially sulfonated novolak resin, (ii) polymethacrylic acid, copolymers of methacrylic copolymers of methacrylic acid, or combinations of said polymethacrylic acid and said copolymers of methacrylic acid, and (iii) combinations of (i) and (ii) and then (b) applying sufficient stain resist agent by foam application to provide a stain resistance rating of at least about 5.
Dependencies are inferred from the claim text.