Double-component polyurethane modified liquid silicone rubber and preparation method thereof

The invention relates to double-component polyurethane modified liquid silicone rubber and a preparation method thereof. The double-component polyurethane modified liquid silicone rubber is prepared from a component A and a component B, wherein the component A is prepared from amino silicone oil and filler in a certain ratio, the component B is prepared from a polyurethane oligomer and a catalystin a certain ratio, and the polyurethane oligomer is obtained through a polymerization reaction of polyhydric alcohols, a prepolymerization catalyst and polyisocyanate. During usage, the component A and the component B are mixed in a certain ratio. Rubber mass prepared from the double-component polyurethane modified liquid silicone rubber has good shear strength, tensile strength and elongation atbreak. 本发明涉及种双组分聚氨酯改性液体硅橡胶及其制备方法。所述双组分聚氨酯改性液体硅橡胶包括A组分和B组分，所述A组分由氨基硅油和填料按照定比例制备而成，所述B组分是由聚氨酯低聚物、催化剂按照定比例制备而成，所述聚氨酯低聚物是由多元醇、预聚催化剂以及多异氰酸酯通过聚合反应得到，使用时，所述A组分与所述B组分按照定比例混合。本发明所述双组份聚氨酯改性液体硅橡胶制得的胶体具有良好的剪切强度、拉伸强度、断裂裂伸长率。