磷酸酯改性的环氧-聚氨酯丙烯酸酯的合成及性能

以双酚A二缩水甘油醚（CYD-128）、磷酸二酯、甲苯2,4-二异氰酸酯（TDI）和丙烯酸羟乙酯（HEA）为原料合成了一种新型无卤的光敏性阻燃预聚物，并对其结构进行了表征。研究了以所制预聚物为基料的紫外光固化涂料的光敏性和阻燃性。结果表明：该涂料3s能固化（以1kW高压汞灯为光源，照距15cm）；其固化膜有较高的分解温度，800℃下形成的炭渣能达到涂层原质量的20%左右，固化膜的极限氧指数（LOI）达到26.3，具有一定的耐热防火性能；固化膜的耐热防火性能随其磷含量的增加而提高。

Synthesis and properties of phosphate modified epoxy resin urethane acrylates

A new class of halogen-free photosensitive and flame retardant oligomers were synthesized by 4,4'-diglycidylether of bisphenol A(DGEBA), dialkyl phosphate, tolulene 2,4-diisocyanate(TDI) and hydroxyethyl acrylate(HEA). These oligomers were characterized by IR spectroscopy. The photochemical and flame retardant properties of the UV curing coatings based on the oligomers were studied. It is found that the coatings have a short curing time about 3 seconds under 1000W high-pressure mercury lamp at a distance of 15cm from the sample, and both the degradation temperature and the char yield under 800℃ of the coatings are high (more than 20%), which indicate their thermal stability and flame retardancy are good. The cured films have the limiting oxygen index (LOI) values of 26.3. With the increase of the phosphorus concentration in the coating, the thermal stability and flame retardancy of the coatings are enhanced.