使用3-异氰酸酯基丙基三乙氧基硅烷和聚己内酯多元醇反应生成聚氨酯预聚物,烷基硅氧烷单体改性纳米硅溶胶制备水解液,将预聚物、KH-560和水解液混合制备有机无机杂化树脂研究了固化剂用量、固化温度和有机组分含量、聚己内酯多元醇的选择对涂膜拉伸强度、伸长率和耐烧蚀性能的影响。结果表明:采用聚酯多元醇比例m(CAPA3050):m(CAPA2085)为1.0:2.6,树脂和固化剂的比例为7:1,固化温度为100℃,当有机组分含量在50%时,涂膜拉伸强度、伸长率及耐温性能最佳。

In this paper,3-isocyanatopropyltriethoxysilane and polycaprolactone polyol are used to react to generate polyurethane prepolymer.Alkylsiloxane monomer modified nano-silica sol is used to prepare hydrolysate.The prepolymer, KH-560 is mixed with hydrolysate to prepare organic-inorganic hybrid resin.The effects of the amount of curing agent,curing temperature and organic component content,and the choice of polycaprolactone polyol on the tensile strength,elongation and ablation resistance of the coating film were studied.The results show that when the ratio of polyester polyol m(CAPA3050):m(CAPA2085) is 1.0:2.6,the ratio of resin and curing agent is 7:1,and the curing temperature is 100℃,when the organic component content is 50%,The coating film has the best tensile strength,elongation and temperature resistance.