It can be seen from the formula of hydrosilane addition reaction that the hydrosilane addition reaction mainly includes compounds containing carbon-carbon double bond, compounds containing hydrosilane bond and platinum catalyst, none of which is missing. Among them, compounds containing carbon carbon double bond can be small organic molecules containing carbon carbon double bond, can also be small organic molecules containing carbon carbon double bond or organic silicon polymer, such as vinyl silicone oil, vinyl silicone rubber and vinyl silicone resin, etc. The compounds containing hydrogen and silicon bonds mainly include small silicone molecules containing hydrogen and silicon bonds and high silicone polymers containing hydrogen and silicon oil, hydrogen silicone resin and hydrogen silicone rubber. Platinum catalyst, currently the most widely used is the use of specific thinners diluted Karstedt's catalyst (catalyst), the main component of platinum and vinyl double head complex, high catalytic activity, fast reaction, but also has the disadvantage of easy poisoning deactivation, so in the process of packaging, transportation and use, To avoid platinum catalyst contact with nitrogen, phosphorus, sulfur and other elements of organic matter and containing tin, lead, mercury, bismuth, arsenic and other heavy metal ionic compounds, these substances are easy to make platinum catalyst poisoning failure.
Hydrosilane addition reaction can also take place at room temperature, after heating the reaction speed is extremely fast, accompanied by the reaction process will have a large amount of heat release. Therefore, when the reaction is used for industrial production, attention should be paid to the order of ingredients, and the ratio of each component in the formula should be controlled within a reasonable range to prevent the impact of product performance or accident. Usually, silicon hydrogen addition reaction, in addition to carbon compounds, compounds containing silicon hydrogen bond of carbon double bond and platinum catalyst, these three components will also add a small amount of inhibitor, the effect of polymerization inhibitor is mainly inhibit the silicon hydrogen addition reaction at room temperature of reaction rate, but under the condition of heating, polymerization inhibitor for silicon hydrogen addition reaction of the effect of reaction rate is minimal.
Understand the silicon hydrogen addition reaction after the components and the application field, use silicon hydrogen addition reaction of specific products, you can select different indicators of raw materials, design different formulations, and various types of additives to improve the performance of the product, you can select different activity of platinum catalyst, and change the method of adding amount of platinum catalyst to control the reaction rate, Improve production efficiency, and finally make excellent products.