Hydrosilane addition reaction refers to the addition reaction between organosilicate compounds containing silica-hydrogen bonds and compounds containing unsaturated bonds under certain conditions. It is the main form of forming silica-carbon bonds and one of the most basic and important types of reactions in organosilicate chemistry. Unsaturated bonds can be C-C double bond, C-C triple bond, C-O double bond, C-N double bond, etc. Among them, the addition reaction of SiH bond with C C double bond is the most common SiH addition reaction in the silicone industry, and it is the core reaction of many additive silicone products.

In addition to silicate and unsaturated compounds, the catalyst is an indispensable component of the hydrosilicate reaction, which can accelerate the reaction speed, shorten the reaction time and reduce the reaction temperature. The catalyst of hydrosilication reaction is mainly the compound and complex of ⅧB group transition metal elements in the periodic table, such as platinum, palladium, nickel and rhodium, among which the platinum catalyst has the highest catalytic activity and is widely used.

There are a number of substances that can make platinum catalysts "toxic", resulting in reduced or even inactivated catalytic activity. For example, organic compounds containing nitrogen, phosphorus, sulfur and other elements and ionic compounds containing tin, lead, mercury, bismuth, arsenic and other heavy metals. Therefore, in the use of platinum catalyst need to pay special attention to avoid platinum catalyst exposure to these substances can make it toxic. There are many types and forms of platinum catalysts, so in the application process, we should choose the appropriate platinum catalyst according to the characteristics of the reaction system, in order to achieve the best catalytic effect.