Dow Corning Corporation

Antony P Wright

Padmakumari J Varaprath

Thomas F Lim

Peter Y Lo

Richard Dickinson Chambers

Kyuha Chung

Ming-Hsiung Yeh

Michael D Meddaugh

Martin P Greenhall

LeRoy E Thayer

Joseph P Kennedy

Chi-long Lee

Daniel Graiver

William James Schulz, Jr

Jerome M Klosowski

John L Speier

John Robert Keryk

Beth I Gutek

Alan L Freiberg

Donald R Weyenberg

David John Bunge

James R Malek

Kirsten L Reading

Stacia A Rivers-Farrell

Lawrence Dale Fielder

Paul B Sykes

Lech Wilczek

David J Rengering

Kenneth W Moorhead

Jonathan Vierling DeGroot, Jr

Robert L Bixler, Jr

William X Baizer

Heat curable silicone rubber composition with improved resistance to engine oils and coolants

Iodine terminated liquid telechelic telomers of chlorotrifluoroethylene (CTFE) containing an average of more than 1 CTFE unit per molecule are novel compounds. The telomers can be prepared by a photochemically initiated reaction between liquified CTFE and either elemental iodine or the telogen ICF.sub.2 CFClI at temperatures below about 50.degree. C.

Telechelic telomers of chlorotrifluoroethylene

The present invention relates to a silicone coating composition which, when cured on a solid substrate either by ultraviolet or electron beam radiation, provides a transparent abrasion resistant coating firmly adhered thereon. The silicon coating is prepared by reacting at least one multifunctional acrylate monomer with an amino-organofunctional silane, mixing the modified silane with at least one acrylic monomer and thereafter adding colloidal silica.

Radiation curable acryloxyfunctional silicone coating composition

Telechelic telomers of chlorotrifluoroethylene and method for preparing

A process is disclosed wherein a telomer having the formula BrCH.sub.2 CH.sub.2 (CF.sub.2 CFX).sub.n CH.sub.2 CH.sub.2 Br is prepared by reacting a telogen of the formula Br(CF.sub.2 CFX).sub.n CH.sub.2 CH.sub.2 Br with ethylene in the presence of an organic free-radical generator, wherein X is fluorine or a trifluoromethyl radical and n is an integer having a value of 1-5. It has been found that, when at least 0.05 mole of said free-radical generator is used for each mole of said telogen, the conversion of the telogen to the telomer is surprisingly increased.

Process for preparing telomers from ethylene and alpha,

A curable organosilicon composition comprises a component having silicon-bonded hydrogen atoms, a component having silicon-bonded radicals reactive therewith, a curing catalyst, a catalyst-inhibitor and a bath life extender. The use of certain compounds, which are ineffective as a bath life extender in the absence of a catalyst inhibitor, effectively extend the room temperature bath life of a silicone coating composition containing a catalyst inhibitor. Being a substantial non-inhibitor for the catalyst the bath life extender component does not effect the cure time and/or cure temperature of the composition. This discovery has permitted the preparation of curable coating compositions which have a long bath life at room temperature and a rapid cure time at elevated temperatures which does not drift to longer intervals as the coating compositions ages over a typical production run. The room temperature cure times of the organopolysiloxane coating compositions of this invention are adequately long, and their cure times at elevated temperature are advantageously brief, that they are useful in fast-paced coating operations, such as adhesive release coating operations wherein the cured coating is further coated with an adhesive in-line, i.e., immediately after being cured.

Heat-curable silicone compositions having improved bath life

Difunctional halo silicon amide compounds are prepared by cleaving the nitrogen-silicon bond in a nitrogen-silicon heterocycle with a reactive halide. The reaction is straight forward with no intermediates or byproducts. The halo functionality is capable of capping any SiOH group. When the other functionality is an acrylamide, the capped entity may be polymerized or crosslinked by free radical initiators of the acrylamide functionality thereby producing useful products such as paper release coatings and photoresists.

Novel synthesis of difunctional halo organo noncarbon group IV main

Organosilicon amine capped resins are prepared by reacting silanol siloxane resins with a cyclic silazane. The product organosilicon amine capped resins are reacted with an acyl halide to yield siloxane resins with amide organofunctionality. The later reaction is especially useful for obtaining acrylamide organofunctionality which is polymerizable and useful in formulating coating compositions such as pressure sensitive adhesives.

Siloxane soluble (CH.sub.3).sub.3 SIO.sub.1/2 /SIO.sub.2  (M/Q) resins

Disclosed is a process to reduce oxygen in an inert gas stream by introducing a reducing gas into the inert gas in the presence of an electron beam. This process of reducing oxygen can be used when producing radiation curable release coatings that need a desired release force. These release coatings, particular, are used in the production of pressure sensitive adhesives.

Method for controlling release forces in release coatings

Curable organosilicon compounds which contain (meth)acryl-amido-substituted hydrocarbon radicals have their viscosities greatly reduced by the addition of a small amount of a vinyl monomer compound. Advantageously, the resulting compositions are more easily applied to a substrate, such as paper, in fast-paced coating operations without the significant loss of useful properties, such as the cure rate of the curable composition and the adhesive release behavior of the cured composition.

Curable silicone compositions comprising vinyl monomer

Organosilicon compounds containing at least one acylamino-substituted hydrocarbon radical are prepared by reacting an organosilicon compound containing at least one amino-substituted hydrocarbon radical with an acyl halide in the presence of a large particle size solid base such as a basic ion exchange resin. A solvent is required only when it is necessary to reduce the viscosity of the reactants.

Process for synthesis of acylamino organosilicon compounds

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Rhodes, MI, United States of America

Antony P Wright