Patent ID: 6544299
Filing Date: 2003-04-08
Classification: D06P,Y10S

Abstract:
A method of enhancing colorfastness to water of cationic dyeable nylon fibers dyed with acid and/or premetalized acid dyes, the process comprising contacting the dyed nylon fibers with an anionic water bleed fixing agent comprising an aqueous solution of (a) polymethacrylic acid, (b) copolymers of methacrylic acid and an ethylenically unsaturated comonomer, (c) copolymers of methacrylic acid and a novalac polymer, or (d) combinations of (a)with (b) or (c) under conditions to fix said bleed fixing agent for use on nylon fibers to the nylon, and thereafter applying a cationic polyamine or polyamide fixing agent, wherein the cationic polymer fixing agent reacts with the anionic water bleed fixing agent to form a network that prevents and/or reduces transfer of dye from the nylon fibers to other textile materials.