国产精品国产精品偷麻豆_丁香婷婷久久大综合_国产精品亚洲玖玖玖在线观看_深夜成人毛片天堂 国产精品美女久久久久久_蜜桃视频在线观看免费网址入口_午夜人妻久久久久久久久_少妇人妻AV

Silicone polymer is linear high-molecular compound based on Si - O - Si bond chain, with side chains of methyl, phenyl, vinyl, hydroxyl, hydrogen and other organic groups. By different degree of polymerization and appearance, silicone polymers can be divided into: (1) silicone fluid. With low molecular weight, it is a kind of liquid, main products are OH Polymer, Polydimethyl silicone oil, vinyl silicone oil,methylhydrogen silicone oil, Silicone liquids are used to produce liquid silicone rubbers, sealants, emulsions. (2) silicone gum. With high molecular weight, silicone rubber is semi-solid. Methyl vinyl silicone gum and methyl phenyl silicone gum are main products, which is the raw material of high temperature vulcanized silicone rubbers