A modified polysiloxane resin paints at room temperature was prepared by using 50%( mass fraction)of polysiloxane (DC 3074),20% polyurethane(DH317)and 30% tripropylene glycol dia-crylate (TPGDA)as starting materials,and adding the total mass of 14% amino silane (HD 602)as curing agent and the amount of pigment and additives,we obtained a modified polysiloxane resin color paints.The coating,which has excellent resistance to weathering,is expected to be applicable for paint for steel structure corrosion protection.%以质量分数50%的聚硅氧烷(DC 3074)、20%聚氨酯(DH317)和30%三丙二醇二丙烯酸酯(TPGDA)为原料，经室温下冷混制得改性聚硅氧烷树脂，再以质量分数14%的氨基硅烷(HD 602)为固化剂，并加入适量颜料及助剂而制得改性聚硅氧烷彩色涂膜。该涂料具有优良的耐候性能(3000 h失光率≤15%)，预计可用作钢结构重防腐涂料。
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