A Study on the Preparation of Durable Softening Water Repellents by Blends of Fatty Carbamide/Wax/Acrylic Copolymer(III);Water Repelling Treatment of Nylon Fabrics

지방산 카르바미드/왁스/아크릴 공중합체의 블렌드에 의한 내구유연발수제의 제조에 관한 연구(III);나일론 직물에의 발수처리

Durable softening water repellents for nylon fiber were synthesized, using two compounds: quaternized octadecyl methacrylate-2-diethylaminoethyl methacrylate copolymer as a mother resin of water repellent and quaternized fatty carbamide for improving softness and hydrostatic pressure, of which syntheses were studied in the previous papers. They were blended with waxes and emulsifiers in a variety of ratios and synthesized into water repellent PADWC, and it was nylon taffeta treated with and without textile finishing resin. The synthesized water repellents can be used either or without resin. The optimum curing temperature was 150 to 160$^{\circ}C$ and the optimum concentration was 3 to 5wt%. In the independent and conjunct treatment, the water repellency of nylon taffeta samples have no remarkable changes between initial value and that after three times washing, so these prove that the synthesized compounds are durable water repellent. The water repellency of PADWC-3 and -4 were around 90. Also, comparison of crease recovery and tear strength after repelling treatment showed that the synthesized water repellents have a very high softening effect.