摘要
采用聚氨酯丙烯酸酯为主体树脂,单官能及多官能的丙烯酸酯为稀释剂,配合光引发剂,通过紫外光固化的方法制备了一种性能优异的涂层材料。研究了光固化反应的机理、光引发剂及有机硅改性的聚氨酯丙烯酸酯预聚物(990)、六官能聚氨酯丙烯酸酯预聚物(9006)对涂层性能的影响。结果表明:固化反应为碳碳双键的自由基聚合反应;光引发剂1173与184按质量比1∶1复配使用时涂层的固化程度较高,涂层的凝胶率达到95.6%;990可以明显改善涂层固化后的表面性质,随着990用量的增加,涂层表面接触角呈明显增大趋势;六官能聚氨酯丙烯酸酯预聚物9006的加入可以提高涂层的交联密度,当9006用量为6phr时,其抗张强度为160N,5%热失重温度约为253℃,力学性能和耐热性能有明显的提高。涂层的红外光谱表明,紫外光照射6s或超过6s时,涂层已完全固化。该涂层材料有望在高性能离型纸上得到应用。
Cooperating with photo-initiator,a kind of coating material with excellent performances was prepared by UV curing with the polyurethane acrylate resin as the matrix resin and single functional and polyfunctional acrylate as diluent.The mechanism of photocuring reaction, the effects of photo-initiator,organic silicone modified polyurethane acrylate prepolymer 990 and six functional polyurethane acrylate prepolymer 9006 on the properties of the coating were studied.The results showed that the curing reaction was the free radical polymerization of carbon and carbon double bonds.The curing degree of the coating was higher when the photo-initiators 1173 and 184 were used according to the mass ratio of 1:1.The gel rate of the coating reached 95.6%.The 990 could improve the surface properties of the coating obviously.The contact angle of the coating presented a significant increasing trend with the increase of the dosage of 990.The addition of six functional polyurethane acrylate 9006 could enhance the crosslinking density.When the dosage of 9006 was 6phr,the tensile strength of the coating was 160N and the 5% weight loss temperature was about 253℃.The mechanical properties and heat resistance had improved obviously.The infrared spectrum of the coating suggested that when the curing time was no less than 6s,the coating had cured completely.The coating material was expected to be used in high performance release paper.
作者
杨海冬
曲春艳
王德志
李洪峰
冯浩
张杨
肖万宝
宿凯
白永平
YANG Hai-dong;QU Chun-yan;WANG De-zhi;LI Hong-feng;FENG Hao;ZHANG Yang;XIAO Wan-bao;SU Kai;BAI Yong-ping(Institute of Petrochemistry,Heilongjiang A cademy of Sciences,Harbin 150080,China;College of Chemical Engineering and Technology,Harbin Institute of Technology,Harbin 150001,China)
出处
《化学与粘合》
CAS
2019年第1期28-32,共5页
Chemistry and Adhesion
