Dow Corning Corporation

Patrick J Miller

John T Woodard

Martin C Musolf

Randall P Sweet

Jon Vierling Degroot, Jr

Virgil L Metevia

Gary Hamilton Adams

Christopher Allen Stafford

A method for densifying particulate silica and a method for compounding a curable silicone composition comprising a reinforcing silica filler. The method is particularly useful for densifying particulate silica to be used as a continuous feed to a compounding apparatus for preparing curable silicone compositions.

Method for densifying particulate silica

Aqueous coating compositions for forming elastomeric films around active cores (e.g., drugs) comprising a dispersion of pre-crosslinked polyorganosiloxane latex particles, colloidal silica particles, and a water-dispersible organic material (e.g., polyethylene glycol) are disclosed and claimed. The elastomeric films formed by the coating compositions are used to control the rate of release of an active agent in the cores into an aqueous environment. Methods of formulating the coating compositions and active cores coated with the coating compositions are also disclosed.

Coated active agent-containing article

Aqueous film-forming compositions for controlling the release of active

Process for forming a coated active agent-containing article

A pressure-adherent silicone elastomer composition comprising a homogeneous mixture of a silicone pressure sensitive adhesive composition, a crosslinkable silicone elastomer composition, and, optionally, a viscosity reducing agent. Specifically, the silicone pressure sensitive adhesive composition is a condensation product, having a plasticity of less than 200 mils, of a benzene-soluble resinous copolymer containing silicon-bonded hydroxyl radicals and consisting essentially of triorganosiloxy units of the formula R.sub.3 SiO.sub.1/2 and tetrafunctionalsiloxy units of the formula SiO.sub.4/2 in a ratio of about 0.6 to 0.9 triorganosiloxy units for each tetrafunctionalsiloxy unit present in the copolymer and a polydiorganosiloxane having a viscosity from 100 centipoise to 50,000 centipoise at 25.degree. C.

Low-viscosity pressure-adherent silicone elastomer compositions

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Midland, MI, United States of America

Patrick J Miller