Dow Corning Corporation

Dow Silicones Corporation

David Shawn Tascarella

Anne K Shim

Donald Taylor Liles

Shaow B Lin

Raymond Lee Tabler

Kathleen Barnes

Dan J Julian

Kathleen Ann Barnes

A method and apparatus for making silicone-in-water emulsions comprising high viscosity silicone polymers is provided. In various aspects, polyorganosiloxanes are polymerized into high viscosity silicone polymers then emulsified in a continuous process, wherein the process is carried out using a single apparatus. In some aspects, the provided apparatus is an extruder for polymerizing polyorganosiloxanes into high viscosity silicone polymers and then emulsifying such polymers.

Continuous process for polymerization and emulsification of siloxane

High viscosity silicone compositions such as silicone gums, silicone rubbers, silicone elastomers, and silicone resins, are emulsified by mechanical inversion in which silicone water-in-oil (W/O) emulsions are inverted to silicone oil-in-water (O/W) emulsions. Silicone resins with a viscosity of about one billion centistoke (mm/s), i.e., 1,000,000,000 centistoke (mm/s) have been emulsified. These silicone O/W emulsions are useful in personal care products where they are capable of providing improved aesthetics. They are also useful in products used in the paper industry and medical industry. The silicone O/W emulsions are easier to handle than the high viscosity silicone in the emulsion, which enables the emulsions to mixed with other emulsions or other water-soluble ingredients.

Mechanical inversion process for marking silicone oil-in-water emulsions

Curable coating compositions from emulsions of elastomeric polymers and polyurethane dispersions

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Midland, MI, United States of America

David Shawn Tascarella