采用溶胶-凝胶法，以正硅酸乙酯（TEOS）为无机前驱物，γ-甲基丙烯酰氧基丙基三甲氧基硅烷（KH-570）、甲基三乙氧基硅烷（MTES）和二苯基二甲氧基硅烷（DDS）为有机相前驱体，醋酸为催化剂，通过水解-缩聚反应制备有机硅/SiO₂有机-无机杂化溶胶。采用杂化溶胶改性水性丙烯酸树脂制备了丙烯酸-硅氧烷复合涂料。探讨了封闭型水性异氰酸酯含量对复合涂层的性能影响。结果表明：有机硅/SiO₂杂化溶胶成功地接枝到水性丙烯酸树脂分子上，异氰酸酯顺利与羟基发生交联反应。随着封闭型水性异氰酸酯含量的增加，涂层硬度、耐冲击强度和附着力先增大后减小。当封闭型水性异氰酸酯质量分数为8%时，涂层具有较好的综合物理性能和耐蚀性。

Silicone/SiO₂ organic-inorganic hybrid sols were prepared by means of sol-gel method and through hydrolysis-polycondensation reaction from following reagents: tetraethyl orthosilicate (TEOS) as inorganic precursor, 3-methacryloxypropyltrimethoxysilane (KH-570), methyl triethoxysilane (MTES) and diphenyl dimethoxy silane (DDS) as organic precursor and acetic acid as catalysts. An acrylic-silicone composite coating was prepared using a hybrid sol modified aqueous acrylic resin. The effect of blocked water borne isocyanate content on the performance of composite coatings was investigated. The results show that the organosilicon/SiO₂ hybrid sol was successfully grafted onto the waterborne acrylic resin molecule, and the isocyanate smoothly crosslinked with the hydroxyl group. As the content of the blocked aqueous isocyanate increased, the hardness, impact strength and adhesion of the coating first increased and then decreased. When the mass fraction of the blocked aqueous isocyanate was 8%, the coating had good comprehensive physical properties and corrosion resistance.