健康·安全·环境
第46卷第5期 2016年5月
涂料工业
PAINT& COATINGS INDUSTRY
三异丙醇胺交联改性阳离子水性聚氨酯
封底漆的合成及其性能
孙培炎，陈福修，邱方，邱倩，陶灿，程芹，许戈文，鲍俊杰“（安徽大学化学化工学院，绿色高分子安徽省重点实验室，合肥230601）
Vol.46No.5 May2016
摘要：以三异丙醇胺（TIPA）为交联剂制备了不同交联度的阳离子型水性聚氨酯（CWPU）。用红外表征其结构，并分别对CWPU乳液的粒径分布和胶膜的机械性能、热学性能以及耐水性进行了测试。结果表明：随着TIPA含量的增加，CWPU乳液的平均粒径先减小后增大，胶膜硬度增加，拉伸强度增大，软段玻璃化转变温度提高，耐水性和耐热性提升。当TIPA加人量为1.80%时，胶膜机械性能最优，拉伸强度达17.5MPa，硬度达部D65，耐热性也最好；当TIPA加入含量为1.35%时，胶膜耐水性最好，96h吸水率为4.2%，并且乳液粒径较小，较适合作木器封底漆。
关键词：阳离子水性聚氨酯：交联改性：三异丙醇胺：封底漆中图分类号：TQ630.4*3文献标识码A
文章编号：0253-4312（2016）05-0054-06
Preparation and Properties of Cationic Waterborne Polyurethane Crosslinked by Trisopropanolamine for Wood Sealing Coat
Sun Peiyan, Chen Fuxiu, Qiu Fang, Qiu Qian, Tao Can, Chen Qin, Xu Gewen, Bao Junjie
(School of Chemistry and Chemical Engineering, Anhui University; Key Labortory of EnironmentfriendlyPolymer Materials of Anhui Prouince, Hefei 230601,China)
Abstract:A series of cationic waterborne polyurethanes (CWPU) with different degree of crosslinking density using triisopropanolamine(TIFA) as crosslinking agent. The attenuated to tal reflection (ATR) was used to characterize the structure of the CWPU. The particle size distribution of CWPU emulsions and the mechanical, thermal, and water resistant properties of the cured film were measured. When the content of TIFA increased, the average particle size of CWPU emulsion decreased first and then increased, in addition, the hardness and tensile strength of the cured film increased, the glass transition temperature of soft segment increased, the water resistance and heat resistance performance were also improved. When addition amount of TIPA was 1.80%, the mechanical performance of the cured film was optimal, the tensile strength was 17.5 MPa, the Shore hardness was D65, and the heat resistance was also optimized; When addition amount of TIPA was 1.35%, the film water absorption was 4.2% indicating the optimal water resistance, and the emulsion particle size was smaller, which ena-bled the CWPU to be suitable for wood sealing coat
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