UV固化粉末涂料用不饱和丙烯酸酯共聚物的合成  

Synthesis of Unsaturated Acrylate Copolymers for UV Curing Powder Coatings

作　　者：周诗彪[1] 熊志夫[1] 张维庆[1] 李林[1] 张儒祥[1] 肖安国[1] 

机构地区：[1]湖南文理学院化学化工系,湖南常德415000

出　　处：《涂料工业》2006年第7期38-40,45,共4页Paint & Coatings Industry

基　　金：湖南省教育厅重点资助项目(03A030);常德市重点攻关项目(20030901)

摘　　要：以AIBN作引发剂、巯基乙酸作链转移剂、甲基丙烯酸缩水甘油酯作封端剂、苄基氯化三乙胺作催化剂，合成了紫外光固化粉末涂料用的不饱和丙烯酸酯共聚物（即光敏聚合物）。探讨了投料单体组成对光敏聚合物玻璃化温度的影响，考察了封端反应条件对光敏聚合物分子有效率的影响。对合成的预聚物及光敏聚合物进行了UV、FT-IR、DSC测试表征。研究表明：要制得有效率高的光敏聚合物分子，适宜的反应条件为：甲基丙烯酸缩水甘油酯与预聚物物质的量之比1．5-2．0，反应温度为138℃，反应时间为9-12h，催化剂的用量选择在1．0％～1．5％（以GMA与预聚物总物质的量计）。The unsaturated acrylate copolymers（photosensitive polymers） for UV curing powder coatings were synthesized by using AIBN as initiator, thioglycolic acid as chain transfer agent, glycidyl methacrylate as terminating agent, and benzyl triethylamine chloride as catalyst. Effects of monomer ratio on the glass transition temperatures of photosensitive polymers and influence of termination conditions on effective photosensitive polymer molecales were discussed. The prepolymers and photosensitive polymers were characterized by use of FT - IR, UV, and DSC. The results show that the reaction conditions for preparing the photosensitive polymer with high efficiency are the mole ratio of GMA and prepolymer 1.5 - 2.0, reaction time 9 12 h, reaction temperature 138℃, the content of catalyst 1.0wt% ～1.5wt%.

关 键 词：丙烯酸酯 共聚反应 紫外光固化 不饱和树脂 粉末涂料 

分 类 号：TQ630.4[化学工程—精细化工]