有机硅改性无溶剂阳离子型聚氨酯/丙烯酸酯复合乳液的制备

Preparation of solvent-free cationic silicone modified Polyurethane / polyacrylate composite emulsion

摘要:

以异佛尔酮二异氰酸酯（IPDI）、聚四氢呋喃二醇（PTMG1000）、N-甲基二乙醇胺(MDEA)、三羟甲基丙烷（TMP）等为主要原料，通过硅烷偶联剂γ-氨丙基三乙氧基硅烷（KH550）封端改性，制备了无溶剂阳离子型聚氨酯/丙烯酸酯核壳乳液表面施胶剂(PAU)。通过红外光谱（FT-IR）、热重分析（TG）、X射线衍射分析(XRD)、透射电镜（TEM）、力学性能等对其结构与性能进行了表征及测试，结果表明：当n(-NCO):n(-OH)=1.07，m(St):m(BA)= 1：2，w(MDEA)=5.50%，w(TMP)= 0.55%，w(KH550)= 0.69%时，合成的聚氨酯有良好的力学性能与施胶性能，而且有机硅的加入增强了膜的柔韧性。

Abstract:

The solvent-free cationic silicone modified polyurethane /polyacrylate composite emulsion(PAU) were prepared by isophorone diisocyanate(IPDI),polytetrahydrofuran glycol(PTMG1000), N-methyldiethanolamine(MDEA), trimethylolpropane(TMP) and othermaterials, with silane coupling agent (KH550) . The chemical structure of PAU and properties of emulsions were characterized by FT - IR , TG, XRD, TEM and so. The results showed that : when n (-NCO): n (- OH) = 1.07, m (St): m (BA) = 1:2, MDEA content was 5.50%, TMP content was 0.55%, KH550 content was 0.69%, it synthesizes polyurethane with the expected structure, and the addition of silicone enhanced flexibility of the membrane.