健康·安全·环境
第46卷第8期 2016年8月
涂料工业
PAINT&COATINGS INDUSTRY
Vol.46No.8 Aug.2016
新型水性紫外光固化聚氨酯丙烯酸酯的制备及性能
张文君.张海召，杨永登，王家喜“
（河北工业大学化工学院高分子科学与工程系，天津300130）
摘要：以对乙烯基苯磺酸催化季戊四醇和丙烯酸反应，制备出不同羟基含量的季戊四醇丙烯酸酯混合物，进一步与由异佛尔酮二异氰酸酯与聚乙二醇合成的一NCO封端的聚氨酯预聚物反应，得到水性紫外光固化聚氨酯丙烯酸酯。用FT-IR和'H-NMR表征了产物的结构，讨论了反应的配料比对酯化反应转化率及最终光固化树脂性能的影响。所制备的水性聚氨酯丙烯酸酯光固化速度快、硬度高。当催化剂对乙烯基苯磺酸用量为4%，丙烯酸与季戊四醇物质的量比为3.2：1时，最终得到的聚氨酯丙烯酸酯光固化涂膜的综合性能最佳。
关键词：紫外光固化；季戊四醇；丙烯酸；水性聚氨酯丙烯酸酯
中图分类号：TO630.4*3
文献标识码：A
文章编号：0253-4312(2016)08-0058-06
Preparation and Properties of Novel UV-Curable
WaterbornePolyurethane-Acrylates
ZhangWenjun,Zhang Haizhao,Yang Yongdeng,Wang Jiaxi
(Department of Polymer Science and Technology, School of Chemical Engineering,
Hebei University of Technology,Tianjin 300130,China)
Abstract:The UV-curable waterborne polyurethane-acrylates have been prepared by re-action of pentaerythritol acrylates having different content of hydroxyl group, which is obtained by esterification of pentaerythritol with acrylic acid at the presence of p-vinyl benzene sulfonic acid,with the—NCO terminated polyurethane prepolymer prepared by reaction of isophorone diisocyanate with polyethylene glycol. The obtained products are characterized by FT-IR and H-NMR.The effect of different molar ratio on the esterification conversion and properties of the cured films are discussed.The obtained waterborne polyurethane-acrylates can be cured quickly toform a film with good hardness.The comprehensiveperformance of the cured film is optimized when the content of p-vinyl benzene sulfonic acid is 4% and the molar ratio of acryl ic acid to pentaerythritol is 3. 2 :1.
Key Words:UV curing;pentaerythritol; acrylic acid; waterborne polyurethane-acrylate
水性聚氨酯丙烯酸酯（WPUA）树脂是目前研究最多的紫外光固化低聚物之一，该树脂综合了聚氨酯优良的耐磨性、柔韧性和聚丙烯酸酯树脂硬度高、耐
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水性及耐化学性良好等特点，因此备受关注[1-3]。目前市场上的树脂大多以单官能度内丙烯酸酯封端，其可光固化的丙烯酸酯基团的密度不高，导致涂膜固化速