Platinum Catalysts Used in the Silicones Industry THEIR SYNTHESIS AND ACTIVITY IN HYDROSILYLATION

Content Provider	Semantic Scholar
Author	Lewis, Larry Neil Stein, Judith Colborn, Robert Edgar Hutchins, Gudrun A.
Copyright Year	1997
Abstract	Hydrosilylation is a reaction widely used in the silicones industry for the preparation of monomers, containing silicon-carbon bonds, and for crosslinking polymers, and results in a variety of products. Hydrosilylation reactions are catalysed by highly active platinum catalysts, such as the silicone-soluble Karstedt's catalyst, which is prepared by the reaction of chloroplatinic acid, H,PtCl,, with vinyl-silicon containing compounds, such as diuinyltetramethyldisiloxane, Af'iVf. Inhibitors are widely used during hydrosilylation reactions to prevent premature crosslinking of polymers at ambient temperature, but permit rapid platinum-mediated crosslinking reactions at higher temperatures. Platinum colloids are formed at the end of the reaction and were identvied by analysis. This paper discusses the mechanism of the hydrosilylation reaction, catalyst formation, characterisation, the effects of inhibitors and the range and complexity of the end products.
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Language	English
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Content Type	Text
Resource Type	Article