Hydrosilylation reaction refers to the addition reaction between an organosilicon compound containing a silicon-hydrogen bond and a compound containing an unsaturated bond under certain conditions. One of the important types of reactions. The unsaturated bonds can be carbon-carbon double bonds, carbon-carbon triple bonds, carbon-oxygen double bonds, carbon-nitrogen double bonds, and the like. Among them, the addition reaction of silicon-hydrogen bond and carbon-carbon double bond is the most common hydrosilylation reaction in the silicone industry, and it is the core reaction of many addition-type silicone products.

For the hydrosilylation reaction, in addition to the hydrosilylation compound and the unsaturated compound, the catalyst is an indispensable component, which plays the role of accelerating the reaction speed, shortening the reaction time and lowering the reaction temperature. The catalysts for the hydrosilylation reaction are mainly compounds and their complexes of VIIIB transition metal elements platinum, palladium, nickel and rhodium in the periodic table, among which the platinum catalyst has the highest catalytic activity and is the most widely used.

Platinum catalysts used to catalyze hydrosilylation reactions are mainly divided into homogeneous catalysts and heterogeneous catalysts. Among them, the homogeneous catalyst and the reactant are in the same phase, and there is no phase interface. In the hydrosilylation reaction, the homogeneous catalyst generally refers to a liquid catalyst.