Modified silicone rubber and preparation method thereof

The invention belongs to the technical field of high polymer materials, and particularly relates to modified silicone rubber and a preparation method thereof. The modified silicone rubber is prepared from, by weight, 27-38% of methyl vinyl silicone rubber, 5-10% of boron fiber, 10-15% of fine ceramic powder, 8-13% of white carbon black, 1-3% of modified tree ashes, 0.5-1.0% of hydroxyl silicone oil, 0.4-0.8% of a vulcanizing agent and 30-40% of flame retardant. Accordingly, all raw materials act in synergy, the preparation method is simple, and the obtained modified silicone rubber is low in density, low in mass, proper in hardness, high in tensile strength, excellent in ageing property, high in tensile elongation, high in tear strength, good in toughness, elasticity and flame retardancy and capable of being widely applied to cable blocking materials. 本发明属于高分子材料技术领域，具体涉及种改性硅橡胶及其制备方法。所述改性硅橡胶由以下重量百分含量的原料制成：甲基乙烯基硅橡胶27-38%，硼纤维5-10%，陶瓷微粉 10-15%，白炭黑8-13%，改性树木灰烬1-3%，羟基硅油0.5-1.0%，硫化剂0.4-0.8%和阻燃剂30-40%。本发明各原料协同作用，制备方法