General Electric Company

Michael A Zumbrum

Larry Neil Lewis

Lionel M Levinson

Jeffrey H Wengrovius

Timothy Brydon Burnell

Chris A Sumpter

William Newell Schultz

Judith Stein

Robert A Smith

Peter M Miranda

Stanlee Teresa Buddle

Donald Frank Rohr

Paul Randall Wilson

Merry S Huber

Paul J Caradori

A method for preparing the first component of a two-component room temperature-vulcanizable (RTV) silicone composition comprises (a) preparing a filler/oil masterbatch by (i) adding an unreactive silicone oil and untreated, aggregated filler particles to a mixer; (ii) adding a filler treating agent such as an organosilane, a polyorganosilane or a silazane to the unreactive silicone oil/filler mixture; and (iii) mixing the unreactive silicone oil/filler mixture and treating agent under conditions sufficient to breakdown the aggregated filler particles to an average size of less than about 300 nm for a time of less than about 24 hours to form the filler/oil masterbatch; and (b) adding said filler/oil masterbatch to a reactive silicone oil.

Filler/silicone oil masterbatch with treating agent for RTV polysiloxanes

There is provided an infrared radiation curable organopolysiloxane composition having a poly(alkenylorganosiloxane), a siloxane hydride, an infrared radiation absorbent material, such as carbon black, and an effective amount of a platinum group metal catalyst. The infrared radiation curable organopolysiloxane composition can be used as a binder for a desiccant, such as a zeolite, useful in making multi-panel thermal pane windows.

Infrared radiation curable organopolysiloxane compositions

A method is provided for making fumed silica aggregate having an average convex perimeter in the range of about 0.12 micron to about 0.6 micron based on the combustion of a mixture of a silicon compound, such as an organosilane, an oxygen containing gas, such as air and a fuel such as hydrogen. The fumed silica aggregate has been found to enhance properties in heat curable filled silicone compositions.

Method for making fumed silica having a reduced aggregate size and

A method is provided for making a rigid spacer, containing a silicone bound desiccant which is useful for a multi-pane sealed window. An infrared radiation curable silicone is used as a binder for a desiccant such as a zeolite which is injected in a continuous manner into a U-shaped or V-shaped semi-rigid spacer such as a steel channel.

Method for making a spacer element for a multi-pane sealed window

A free flowing silicone powder having a primary particle size in the range of 0.1-200 nm and an aggregate size of 10 nm to 200 microns which is a product formed by spray drying an organic solvent dispersion of an organosiloxane hydrolyzate having triorganosiloxy units and tetrasiloxy units.

Free flowing silicone resin powder and method for making

A method for making a substantially silanol-free silicone resin powder having a primary particle size in the range of about 0.1-200 nm and an aggregate particle size of 10 nm to 200 microns is provided. An organic solvent dispersion of an organosiloxane hydrolyzate having triorganosiloxy units and tetrasiloxy units is treated with an organo nitrogen compound, such as a silazane and thereafter spray dried. The substantially silanol-free organosilicon powder has been found useful in making heat curable organopolysiloxane compositions, such as pressure sensitive adhesives.

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Clifton Park, NY, United States of America

Michael A Zumbrum