HYDROSILICONE RESIN AND PREPARATION PROCESS THEREOF

摘要

A liquid hydrosilicone resin and a preparation process thereof are disclosed. The average composition of the liquid hydrosilicone resin is represented by the following formula: (R1R2R3SiO1/2)M·(R4R5SiO2/2)D·(R6SiO3/2)T·(SiO4/2)Q wherein R1 to R6 are identical or different radicals independently selected from the group consisting of organic groups and a hydrogen atom, with the proviso that at least one of R1 to R6 is a hydrogen atom bonded directly to a silicone atom, and M, T and Q each represent a number ranging from 0 to less than 1, D represents a number larger than 0 and less than 1, M+D+T+Q=1, and T+Q>0. The said resin has an average of at least two hydrogen atoms bonded directly to a silicon atom per molecule and a weight-average molecular weight of 10,000-300,000g/mol. The liquid hydrosilicone resin is obtained by dispersing a hydrosilicone oil, a hydroxyl silicone resin and a dehydrogenation catalyst in a solvent to form a dispersion, allowing the dispersion to react, and then removing the solvent and the catalyst.