聚碳酸酯材料表面防护涂料的制备及其性能研究

以TEOS(正硅酸乙酯)和MTEOS(甲基三乙氧基硅烷)为水解前驱体,以耐磨助剂、自制附着力促进树脂(PE-1)与自制反应型紫外光吸收剂(RUV-1)为改性剂,采用溶胶-凝胶技术,制备了一种能够满足聚碳酸酯材料表面防护要求的有机-无机杂化涂料。研究了无机组分与有机组分比例,以及耐磨助剂、PE-1和RUV-1用量等对涂料关键性能的影响。结果表明:当n(MTEOS)∶n(TEOS)=2∶1,耐磨助剂用量为1.5%,PE-1用量为3%,RUV-1用量为1%时,涂层的综合性能最佳,涂层经400冲程耐磨试验后的雾度值仅为4.3%,涂层经多项环境试验后的附着力均为5B,涂覆该涂层的聚碳酸酯材料经120 h紫外光辐照后的黄变指数仅为0.65。

Preparation of Protective Coatings for Polycarbonate Material and Its Performance Study

An organic-inorganic hybrid coatings for polycarbonate material was prepared from TEOS and MTEOS as precursors, and abrasion resistant additives, self-made adhesion promotion resin （PE-1） and self-made reactive UV absorber（ RUV-1 ） as modifier via sol-gel technology. The effects of the organic/inorganic component proportion, and the amount of abrasion resistant additives, PE-1 and RUV-1 on the properties of coatings were studied. The results indicated that the coating showed best comprehensive properties when the technology satisfied the following conditions ： the molar ratio of MTEOS and TEOS was 2 ： 1, abrasion resistant additives amount was 1.5%, PE-1 amount was 3% and RUV-1 amount was 1%. After abrasion resistant test for 400 tim coating was 4.3%. After various environmental tests, the adhesions of the coating were 5B. After 120 h, the yellowness index of the coated PC material was only 0.65 es, the haze of the UV irradiation for