【目的】为了满足建筑外立面装饰用外墙涂料对弹性、耐候性、低温柔韧性、耐沾污性等综合性能的要求。【方法】以聚二甲基硅氧烷为基础聚合物，引入液体环氧树脂-硅烷共聚物改善有机硅强度，搭配少量气相二氧化硅，添加助剂、溶剂，制备了一种低黏度、高强度环氧-有机硅杂化弹性耐沾污涂料。【结果】所制备的涂料黏度为 3 610 mPa·s，拉伸强度为 3. 4 MPa，断裂伸长率 172%，耐冲击性 50 cm，磨损质量为 0. 016 g（500 g，500 r），耐沾污性达到 1级，对水泥纤维板附着力达到 0级。【结论】制备的环氧-有机硅杂化耐沾污涂料综合性能较好，在建筑外墙等领域具有广阔的应用前景。

［Objective］ This study aims to meet the comprehensive performance requirements ofexterior wall coatings for building facade decoration，including elasticity，weather resistance，low-temperature toughness，and stain resistance.［Methods］A low-viscosity，high-strength epoxy-silicone hybrid elasticstain resistance coating was prepared using polydimethylsiloxane as the base polymer. A liquid epoxy resin-silane copolymer was introduced to improve the strength of the silicone matrix，along with a small amount of fumed silica，additives and solvents.［Results］The prepared coating exhibited a viscosity of 3 610 mPa·s，a tensile strength of 3. 4 MPa，an elongation at break of 172%，an impact resistance of 50 cm，and a wear resistance of 0. 016 g（500 g，500 r）. The stain resistance grade reached level 1.［Conclusion］The preparedepoxy-silicone hybrid stain-resistant coating demonstrates excellent comprehensive performance，and holds broad application prospects in building exterior and related fields.