Dow Corning Corporation

Tara Nicole Estes

Janet Mary Smith

Robert Harold Krahnke

David B Selley

Michael Bradley Gee

Anne Marie Buckingham

A composition is formed by combining water with an organic polymer such as polybutylene or an alkyd resin, and an alkoxysilane of the formula R.sub.n Si(OR').sub.4-n where R is an alkyl radical of 1-10 carbon atoms, an alkenyl radical having 2-8 carbon atoms, phenyl, chloropropyl, or trifluoropropyl, n is 1 or 2, and R' is an alkyl radical having 1-6 carbon atoms. The composition is free of amine or quaternary ammonium functional silanes. It can be emulsified and used to treat a cellulosic or masonry surface to render it water repellent.

Water repellent composition

A dry, non-oily, non-greasy, rubber or vinyl surface protectant contains a silicone component and an acrylic component in its formulation. When only the silicone component is applied to rubber and vinyl surfaces, the surfaces become glossy but feel oily. When only the acrylic component is applied, they are glossy and feel dry but are tacky and draggy as if a heavy residue was present. When components are blended and applied to rubber and vinyl surfaces, the surfaces have a dry shine with good gloss and feel completely dry. The treated surfaces are also not tacky and give no sensation of heavy residue presence.

Rubber and vinyl protectant

A method is described of producing alkoxysilalkylene enblocked polydiorganosiloxane in two steps. First, silanol terminated polydiorganosiloxane is capped with an SiH containing silazane in the presence of an acid catalyst. Then, that polymer is reacted with an alkoxy functional alkenylsilane in the presence of a hydrosilylation catalyst to give the desired polymer. The polymers are useful in formulating room temperature curing sealants.

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Midland, MI, United States of America

Tara Nicole Estes