HPMS-PU的制备与应用研究

采用两步法合成了一系列以羟基硅油(HPMS)/聚醚二醇(PTMG)为软段,异佛尔酮二异氰酸酯(IPDI)为硬段(TMP为交联剂,MDEA为扩联剂)的自乳化双软段水基聚氨酯微乳液。从红外谱图、DSC和物理力学性能等对阳离子型HPMS/PU微乳液进行了表征和分析,结果表明,HPMS导致PU出现两个玻璃化转变温度,而且HPMS的加入增加了膜的憎水性。此外还研究了其在皮革涂饰中的应用,HPMS-PU乳液稳定性好,用作皮革涂饰剂,可使革的光泽手感以及机械强度都有所提高,涂层耐干湿擦性能良好,因此HPMS-PU乳液适宜做顶层涂饰剂。

Study on Preparation and Application of Polyurethane/ Hydroxyl Terminated Organo-silicone

A series of hydroxyl terminated organo-silicone(HPMS) based polyurethane(PU) micro emulsion were successfully prepared by surfactant-free copolymerization.They were prepared by reacting isophorone isocyanate(IPDI),poly(tetramethylene glycol)(PTMG) and hydroxyl terminated organo-silicone(HPMS) with N-methyldiethanolamine(MDEA) as chain extender and trimethylol propane(TMP) as crosslinker.Characterization and analysis of cationic HPMS/PU emulsion were done includingFT-IR,DSC methods and physics mechanical performance.There were two glass transition temperature because of HPMS,and the hydrophobicity of film was influenced.To study on the applicationof emulsion in leather coating,as a result,the stabilityof emulsion was perfect.Regard as coating agent will make the polish and mechanical properties of leather rising and improves the properties of dry/wet rub.So HPMS/PU is good for bottom coating agent.