Dow Corning Corporation

Steven M Evans

Chi-long Lee

Ming-Hsiung Yeh

Donald Taylor Liles

Peter Y Lo

Martin E Cifuentes

Udo C Pernisz

Jon Vierling Degroot, Jr

Kai Su

Mustafa A Mohamed

Robert Fosdick

Susan A Jeske

Douglas Lothamer

An intermediate reaction product to speed the reaction for producing capped MQ resins is disclosed. The intermediate reaction product includes an MQ-type silicone resin; a halosilane capping agent; and a polar organic compound. Optionally, a condensation catalyst and a solvent may be added to prepare the intermediate reaction product. Also, a method for preparing a reaction product to speed the reaction for producing capped MQ resins is disclosed. The method comprises the steps of combining ingredients comprising: an MQ-type silicone resin; a halosilane capping agent; and a polar organic compound. Optionally, a condensation catalyst and a solvent may be added to prepare the reaction product.

Method for capping MQ-type silicone resins

A process for preparing emulsions of silicone gums is disclosed based on using an ethylene oxide/propylene oxide block copolymer as the emulsifier. The emulsions produced by the present process are useful as coatings additives for both water-based and oil-based coatings to obtain improved slip and anti-mar properties. The emulsions may also be used in the manufacture of tires as band ply lubricants. They may also be used in personal care applications.

Silicone gum emulsions

An impact resistant waveguide includes a clad surrounding a core. A reinforcing filler is incorporated in a curable silicone composition used to prepare the core, thereby imparting impact resistance to the core. A method of manufacture of the waveguide includes injecting the curable silicone composition into a clad made of silicone elastomeric tubing and thereafter curing the curable silicone composition.

Impact resistant optical waveguide and method of manufacture thereof

The present invention provides microencapsulated hydrosilylation catalysts for one-part heat curable organosiloxane compositions. Compositions containing these exhibit long-term storage stability yet cure rapidly when heated above the melting point of the encapsulating polymer. At least a portion of these microcapsules are less than one micron in diameter, and substantially all are less than about three microns in diameter. Compositions containing the preferred platinum group metals as catalysts are optically transparent. The microencapsulated curing catalysts of this invention are prepared by irradiating with UV light in the wavelength range of from 300 to 400 nanometers a solution containing (1) at least one of a specified group of photocrosslinkable organosiloxane compounds derived from propargyl esters of carboxylic acids containing a terminal aromatic hydrocarbon radical and at least two ethylenically unsaturated carbon atoms and (2) a liquid or solubilized hydrosilylation catalyst.

Storage stable heat curable organosiloxane compositions containing a

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Saginaw, MI, United States of America

Steven M Evans