Reinforcement from Alumina-Type Fillers Precipitated into an Elastomer

摘要

The in-situ precipitation of alumina-type fillers into poly(dimethylsiloxane) is achieved by the hydrolysis of an aluminate, aluminum tri-sec-butoxide, in a reaction paralleling the preparation of silica and titania from silicates and titanates. Both Hydrogen chloride and Ammonium hydroxide were found to be good catalysts, but the latter produced particles which gave larger increases in ultimate strength of the reinforced elastomers. Reprints. (aw)