Method for preparing vinyl-terminated organosilicon raw rubber

The invention discloses a method for preparing vinyl-terminated organosilicon raw rubber. The method comprises the following steps of: adopting dimethyl siloxane, silica-alkoxides, an acidic compound,vinyl group-containing hydroxy scavenger and a catalyst as raw materials, and performing vacuum dehydration, a polymerization reaction, a neutralization reaction, a hydroxy substitution reaction through vinyl groups and removal of low-boiling substances sequentially so as to obtain a finished product. The prepared vinyl-terminated organosilicon raw rubber does not contain polymer terminated by other groups than vinyl groups, and has a simple polymerization process and a controllable polymerization reaction; the product is uniform, and the method is suitable for large-scale process production;when the raw rubber is applied to preparation of a rubber compound, the powder mixing time is obviously shortened, the crosslinking reaction is more thorough, and the heat resistance and mechanical properties of the rubber co