新型硫杂蒽酮类光引发剂在水性光固化涂料中的应用  

Application of a Novel Thioxanthone Based Photoinitiator in UV-Curable Waterborne Coating

作　　者：王国建[1,2] 卢良[2] 

机构地区：[1]先进土木工程材料教育部重点实验室(同济大学),上海200092 [2]同济大学材料科学与工程学院,上海200092

出　　处：《涂料工业》2012年第4期59-63,共5页Paint & Coatings Industry

摘　　要：采用自行研制的硫杂蒽酮类光引发剂2-羟基-3-(2-硫杂蒽酮氧基)丙基三甲基氯化铵(TX2)引发水性聚氨酯丙烯酸酯(PUA)涂料在紫外光照射条件下固化。分别用FT-IR光谱法和凝胶含量法分析了光固化过程,同时还研究了干燥条件、光引发剂TX2的用量、助引发剂叔胺的类型、叔胺的用量对紫外光固化速度的影响。结果表明:TX2的光固化速度较快,在30 s内基本固化完全;涂料薄膜在光固化前要预先干燥除水,干燥温度为90℃;当TX2的用量为3.0%(质量分数),助引发剂N,N-二甲氨基苯甲酸乙酯(EDAB)的用量为2.0%时,可以得到较快的光固化速度。采用上述工艺和条件得到的固化膜硬度可达4H,附着力可达1级。A novel thioxanthone based photoinitiator 2 - Hydroxy - 3 - （ 9 - oxo - 9H - thioxanth - en - 2 - yloxy） - propyl - trimethyl - ammonium chloride （TX2） was used in the UV - curing of waterborne poly- urethane acrylic （PUA） coating. The UV - curing process was studied by FT - IR and the gel content analy- sis. The influence of dry condition, amount of photoinitiator TX2, co - initiator type and dosage on the cu- ring rate was also investigated. The results showed that TX2 had good efficiency for UV - curing of PUA coating. The film of PUA coating should be dried at 90 ℃ before it was irradiated. In order to obtain better curing rate, Ethyl 4 - dimethylaminobenzoate （EDAB） was selected as co - initiator. The optimal amount of TX2 and EDAB were 3.0% and 2.0% , respectively. The results of properties test of the cured film showed that hardness was 4H and adhesion grade 1.

关 键 词：硫杂蒽酮 水性光引发剂 光固化 应用 

分 类 号：TQ637.83[化学工程—精细化工]