New Polyorganosiloxanes Prepared from Mineral Silicates.

Abstract : The controlled heat treatment of the polyorganosiloxane prepared by the direct trimethylsilylation of the mineral biotite has resulted in a range of materials. These polymeric products include a mobile liquid; several intermediate products with variations in viscosity and molecular weight; and white solid organosiloxanes with variable amounts of hydrocarbon present. Detailed analysis of these products, and the volatile components given off during heating, by gas liquid, and high performance liquid chromatography has enabled us to identify semi-quantitatively the components present in our original trimethyl-silylation reaction product.