Research On Hydrosilylation Reaction For The Synthesis Of KH-540

Organosilicon is one of the most versatile groups of chemicals on the world, they can share some common features that give them special advantages over other materials. Organosilicon materials become the important branch of chemicals industry and hold a very important status in our country's economy. They are widely used in aerospace, electrical and electronic, textile, light industry, and other industrial sectors.The catalytic hydrosilylation of unsaturated compounds is one of the most elegant methods for the synthesis of organosilicon compounds. Although the hydrosilylation of olefins predominantly uses platinum catalyst in industry at present, the deficiencies are obvious. All the drawbacks often resulted in undesired side reactions. To overcome some of these undesired side reactions, there has been a marked interest in the development of newer and different catalysts for the hydrosilylation reaction.In this paper, Pt-triethylamine complexes were studied as catalysts for the one-pot synthesis of y-aminopropyltrimethoxysilane(KH-540) by hydrosilylation of 3-aminopropene with trimethoxysilane(TMOS). Pt-triethylamine complexes were proved to be active and effective homogeneous catalyst for the hydrosilylation reaction. GC-MS was used to analyze the structures of products qualitatively. The reaction course was monitored by GC, and the products were quantitatively analyzed using internal standard method. Effects of reaction temperature, reaction time, the amount of catalyst, n(TMOS):n(3-aminopropene) ratio, initial pressure on the hydrosilylation were investigated. Under the optimal conditions, the conversion of 3-aminopropene is 87.9%, the selectivity of KH-540 reaches 81.7% and no polymer is found during the whole reaction course of the hydrosilylation.