零VOC无胺型水性聚氨酯-聚丙烯酸酯的制备及其性能  

Preparation and properties of zero VOC and amine-free aqueous polyurethane- polyacrylate

作　　者：赖小娟[1,2] 宋沛艳 王磊[1,2] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [2]陕西农产品加工技术研究院,陕西西安710021

出　　处：《石油化工》2016年第10期1229-1235,共7页Petrochemical Technology

基　　金：国家自然科学基金项目(51103081);陕西省科技计划项目(2016GY-193);西安市科技计划项目(CXY1527)

摘　　要：以异佛尔酮二异氰酸酯、甲基丙烯酸甲酯和耐高温聚酯二元醇（NCL）等为原料,二月桂酸二丁基锡为催化剂,三羟甲基丙烷（TMP）为交联剂,二羟甲基丁酸和1,4-丁二醇（BDO）为扩链剂、丙烯酸羟乙酯为封端剂,制备了磺酸型水性聚氨酯,然后加入KPS引发剂合成了具有核壳结构的无胺型磺酸型聚氨酯-聚丙烯酸酯（WPUA）乳液,利用FTIR,XRD,TEM,TG等方法研究了WPUA乳液及其胶膜的结构和性能。表征结果显示,WPUA乳液不含三乙胺,性能稳定,乳液粒子平均粒径为50~55 nm。实验结果表明,合成WPUA适宜的TMP用量为1.5%（w）（基于乳液体系质量）、n（NCL）∶n（BDO）=1.5,在此条件下得到的WPUA乳液胶膜的耐热性、耐水性及机械性能等性能较好。该磺酸型WPUA满足软包装行业市场要求,是一种新型的无挥发性有机溶剂水性环保材料。The sulfonate-based aqueous polyurethane（WPU） was synthesized from isophorone diisocyanate, polyester diol（NCL） and methyl methacrylate with dibutyltin dilaurate as catalyst, trimethylolpropane（TMP） as crosslinking agent, dimethylol butanoic acid and 1, 4-butanediol（BDO） as chain extenders and hydroxyethyl acrylate as end-capping agent. Then triethylamine-free aqueous polyurethane-polyacrylate（WPUA） with core-shell structure was synthesized with KPS as initiator. The WPUA emulsions and films were characterized by means of FTIR, XRD, TEM and TG. The WPUA triethylamine-free emulsions showed a good stability and the average particle size was in the range of 50-55 nm. The experimental results indicated that, under the appropriate conditions for synthesizing WPUA： TMP dosage 1.5%（w）（based on the emulsion mass） and n（NCL） ： n （BDO） 1.5, the prepared WPUA emulsion had good heat resistance, water resistance and mechanical properties. The synthetic sulfonate-based WPUA could meet the requirements of special packaging materials, and was environmentally-friendly without volatile organic solvents.

关 键 词：三羟甲基丙烷 三乙胺 水性聚氨酯 聚丙烯酸酯 零挥发性有机溶剂 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]