热反应型水性聚氨酯交联剂的合成与应用  

Synthesis and Application of Thermal Reactive Water-Borne Polyurethane Crosslinking Agent

作　　者：张淑芳[1] 马兴元[1] 邱啸寒[1] 胡雪丽[1] 杨西萍[1] 

机构地区：[1]陕西科技大学资源与环境学院,陕西西安710021

出　　处：《中国皮革》2013年第19期37-40,44,共5页China Leather

基　　金：国家中小企业创新基金项目(项目编号:11C26216103660);福建可利得皮革纤维有限公司产学研究项目

摘　　要：以异佛尔酮二异氰酸酯(IPDI)、二羟甲基丙酸(DMPA)、聚丙二醇-2000(PPG-2000)为主要原料,以亚硫酸氢钠(NaHSO3)为封端剂,合成了一种热反应型水性聚氨酯交联剂。研究结果表明:在R值为1.6,DMPA用量为8%,聚合反应温度为70℃,反应时间为1h,催化剂用量为0.1%的条件下,产物为稳定性良好的半透明乳液。作为交联剂,能明显提高水性聚氨酯膜的拉伸强度。FT-IR和DSC显示,产物的—NCO被完全封闭,解封温度为88.3℃。With isophorone diisocyanate （ IPDI ） , dimethylol prop!onic acid （ DMPA ） , polypropylene glycol - 2000 （ PPG - 2000） as the main raw material and sodium bisulfite （ NaHSO3 ） as blocking agent, a kind of thermal reactive water - borne polyu- rethane crosslinking agent was prepared. The results show that the thermal reactive waterborne polyurethane crosslinking agent is a translucent emulsion of good stability under the conditions of preparation which R is 1.6, the amount of DMPA is 8% , the temperature of polymerization is 70℃, the time of reaction is lh and the amount of catalyst is 0.1%. As the crosslinking agent, it can significantly improve the tensile strength of aqueous polyurethane film. The analytic results of FT - IR and DSC show that the--NCO groups of product are completely blocked and the deblocking temperature of product is about 88.3℃.

关 键 词：水性聚氨酯 热反应 交联剂 合成 应用 

分 类 号：TS195.2[轻工技术与工程—纺织化学与染整工程]