水性端丙烯酸酯基聚氨酯的合成与紫外光固化  

Synthesis and UV-curing of waterborne acrylated polyurethanes

作　　者：王浩[1] 唐黎明[1] 陈久军[1] 金凤友[2] 

机构地区：[1]清华大学化学工程系,北京100084 [2]绥化学院实验中心,绥化152061

出　　处：《清华大学学报（自然科学版）》2007年第6期867-869,884,共4页Journal of Tsinghua University(Science and Technology)

基　　金：黑龙江省自然科学基金资助项目(D2005-13)

摘　　要：为提高水性聚氨酯涂层的力学性能及耐水性能,制备了一系列可紫外光固化的水性端丙烯酸酯基聚氨酯。以甲苯-2,4-二异氰酸酯(TDI)、聚乙二醇(PEG)、2,2-二羟甲基丙酸(DMPA)和甲基丙烯酸-β-羟乙酯(HEMA)为原料,采用1H-NMR(核磁共振)分析,表明仅有15%以下的异氰酸酯基参与了副反应。采用动态光散射技术分析,表明聚氨酯分散体的粒径随DMPA含量的增加而减小。测试了紫外固化涂层的玻璃化转变温度、硬度及耐水性。结果表明,固化涂层的耐水性能很好,且随聚氨酯中端丙烯酸酯基含量的增加,固化涂层的热性能和力学性能均有提高。A series of waterborne UV curable acrylated polyurethanes were synthesized with the objective to improve their mechanical properties and resistance to water. Toluene 2, 4 diisocyanate （TDI）, polyethylene glycol （PEG）, 2, 2-dimethylolpropionic acid （DMPA）, and βhydroxyethyl methacrylate （HEMA） were used as the raw materials. ^1H-NMR analysis shows that less than 15% of the isocyanate groups participated in side reactions during the synthesis reaction. Dynamic light scattering measurements show that the particle size in the dispersions decreased with increasing DMPA content in the polymers. The resistance to water of the cured coatings is better than that of uncured coatings. Both the glass transition temperature and the hardness of the cured coatings increased with increasing acrylate group content in the polymers.

关 键 词：水性聚氨酯 端丙烯酸酯基 紫外光固化 涂料 

分 类 号：TQ633[化学工程—精细化工]