Branching addition process of end-side hydrogen-containing silicone oil flexibilizer

The invention belongs to the field of organic silicon modification, and particularly relates to a branching addition process method of a silicone oil flexibilizer containing hydrogen on the end side. According to the preparation process, the complexity of a traditional sol-gel process is abandoned, no organic solvent is contained in the preparation process, the preparation process is environmentally friendly and free of pollution, the loss of epoxy groups in a traditional hydrosilylation reaction is avoided, and the epoxy modified organic silicon resin prepared through the process is colorless transparent viscous liquid and is good in heat stability, high in light transmittance and good in weather resistance. The epoxy modified organic silicon resin flexibilizer prepared by the process has the advantages of favorable epoxy group retention and wide application, is added into bisphenol A epoxy resin according to a given ratio, and is prepared with a certain curing agent and catalyst, and characterization detect