Dow Corning Corporation

Steven Fred Dopp

Jary David Jensen

Herschel Henry Reese

Phillip Joseph Griffith

Susan Jane Gelderbloom

An apparatus for removing air from finely divided particulate material comprises a housing including a vent; an inlet to the housing; an outlet from the housing; a helix, rotatably mounted in the housing, the helix being adapted upon rotation to feed a particulate material from the inlet to the outlet; a motor mounted to the helix for the purpose of rotating the helix; and a compression assembly mounted to the outlet for compressing the particulate material passing through the outlet.

Apparatus and method for increasing density of finely divided particulate matter

A process for making a flowable powdered base suitable for use in the formulation of liquid silicone rubber compositions that can be cured to form silicone elastomers. The process comprises (A) fluidizing a reinforcing silica filler in a high-shear mixer, (B) maintaining the content of the mixer at a temperature below about 60.degree. C. while adding to the mixer a silylating agent, a nitrogen containing compound to facilitate the silylation reaction, and water thereby forming an essentially homogeneous mixture comprising a treated reinforcing silica filler; (C) adding a polydiorganosiloxane having a viscosity of about 0.03 to 300 Pa.s at 25.degree. C. to the mixer and forming a flowable powdered base having an average particle size of from about 1 to 1000 microns, and (D) heating the flowable powdered base under conditions sufficient to remove volatiles.

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Midland, MI, United States of America

Steven Fred Dopp