Patents Represented by Attorney Roger H. Borrousch

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  • Composition for coating optical communication glass fiber
    Patent number: 4755577
    Abstract: Coating compositions for optical communication glass fiber which have improved toughness and release characteristics is made from an organopolysiloxane having vinyl and 20 to 50 mole percent phenyl radical, a polysiloxane having dimethylvinyl-siloxane units and SiO.sub.2 units, an organohydrogenpolysiloxane, and a platinum catalyst.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: July 5, 1988
    Assignee: Toray Silicone Co., Ltd.
    Inventor: Toshio Suzuki
  • Hydraulic silicone crumb with improved heat stability
    Patent number: 4722957
    Abstract: A silicone crumb in a fine particulate form has an extrusion rate of at least 50 grams per minute through an orifice of 0.5 inch diameter under a pressure of 345 kilopascals and compression points of less than 1035 kilopascals. This crumb is made from a vinyl-containing polyorganosiloxane, a silicon-bonded hydrogen containing polysiloxane, a platinum catalyst, and a heat stability additive compound containing zirconium, titanium, or hafnium and organosiloxane. The crumb is useful in hydraulic applications where it is exposed to temperatures above 500.degree. F. for prolonged periods of time.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: February 2, 1988
    Assignee: Dow Corning Corporation
    Inventors: Joseph T. Braun, Schuyler B. Smith
  • In situ low temperature siloxane gel
    Patent number: 4709001
    Abstract: Siloxane gels which exhibit low temperature properties are obtained without the preparation of special polymers. The compositions form the low temperature branching in situ by mixing polydiorganosiloxane having dimethylsiloxane units and methylvinylsiloxane units with a methylhydrogensiloxane crosslinking mixture of monofunctional methylhydrogensiloxane and difunctional methylhydrogensiloxane in the presence of an addition reaction catalyst. The viscosity and the low temperature properties can be controlled.
    Type: Grant
    Filed: January 2, 1987
    Date of Patent: November 24, 1987
    Assignee: Dow Corning Corporation
    Inventor: Myron T. Maxson
  • Method for producing organosilicon polymers and the polymers prepared thereby
    Patent number: 4707531
    Abstract: The method of dripping an alkyl silicate into a mixture of an aqueous hydrochloric acid which contains at least 5 weight percent hydrogen chloride and a trialkylsilane or a disiloxane at a temperature of from 0.degree. to 90.degree. C. is a highly reproducible method for producing a three-dimensional structure of monofunctional siloxane units and tetrafunctional siloxane units. The organosilicon polymers produced are useful as tack agents, coating agents, and as additives in other compositions.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: November 17, 1987
    Assignee: Toray Silicone Co., Ltd.
    Inventor: Akihiko Shirahata
  • Acryl functional silicone compounds
    Patent number: 4697026
    Abstract: Acryl functional silicone compounds are made by reacting an amine functional silicon compound with a di- or multi-functional acryl compound by a Michael-type addition reaction. These acryl functional silicone compounds are purer than others because no catalyst is used and no by-products are formed. These acryl functional silicone compounds can be used as adhesion promoters and as coating compositions which can be cured by ultraviolet radiation.
    Type: Grant
    Filed: January 6, 1986
    Date of Patent: September 29, 1987
    Assignee: Dow Corning Corporation
    Inventors: Chi-long Lee, Michael A. Lutz
  • Hydraulic silicone crumb
    Patent number: 4686271
    Abstract: A silicone crumb in a fine particulate form has an extrusion rate of at least 50 grams per minute through an orifice of 0.5 inch diameter under a pressure of 345 kilopascals and compression points of less than 1035 kilopascals. This crumb is made from a vinyl-containing polyorganosiloxane, a silicon-bonded hydrogen containing polysiloxane, and a platinum catalyst. The crumb is useful in hydraulic applications.
    Type: Grant
    Filed: March 3, 1986
    Date of Patent: August 11, 1987
    Assignee: Dow Corning Corporation
    Inventors: Earl W. Beck, Sam A. Brady
  • Alkenyl organopolysiloxane and curable composition therefrom
    Patent number: 4683278
    Abstract: Organopolysiloxanes which have end groups of the general formula ##STR1## where R is alkenyl, Z is alkylene, R.sup.1 is a monovalent organic group, and a is 2 or 3, when mixed with organohydrogensiloxane and a platinum catalyst cure to high strength products without the use of a reinforcing filler.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: July 28, 1987
    Assignee: Toray Silicone Co., Ltd.
    Inventor: Toshio Suzuki
  • Room temperature-curable organopolysiloxane composition containing a photosensitizer
    Patent number: 4683251
    Abstract: Room temperature-curable organopolysiloxane compositions are made from essentially linear organopolysiloxanes having hydroxyl or hydrolyzable end groups, a crosslinking agent, a filler, optionally a curing catalyst, an unsaturated ester having at least ten carbon atoms in the unsaturated fatty acid component of the ester, and a photosensitizer. These compositions cure to elastomeric materials which do not soil on the surface or the surrounding areas of the substrate in contact with the cure product. The adhesion of these cured products is not reduced.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: July 28, 1987
    Assignee: Toray Silicone Co., Ltd.
    Inventor: Ryuzo Mikami
  • Room-temperature-curable silicon-modified polyether composition
    Patent number: 4683250
    Abstract: Room temperature-curable composition made from a silicone-modified polyether containing silyl end groups having hydrolyzable groups and ester provide a cured silicone product which does not have a tacky surface. Adding a sensitizer to the composition increases the reliability of the surface to be void of tack. These compositions have less dirt pickup.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: July 28, 1987
    Assignee: Toray Silicone Co., Ltd.
    Inventor: Ryuzo Mikami
  • Process for making crumb silicone material
    Patent number: 4670530
    Abstract: Mixing under low shear vinyl-containing polyorganosiloxane, a silicon-bonded hydrogen polysiloxane and a platinum catalyst, and continue mixing produces a crumb which has an extrusion rate of at least 50 grams per minute through an orifice of 0.5 inch diameter under a pressure of 345 kilopascals and compression points of less than 1035 kilopascals. The crumb is useful in hydraulic applications.
    Type: Grant
    Filed: March 3, 1986
    Date of Patent: June 2, 1987
    Assignee: Dow Corning Corporation
    Inventor: Earl W. Beck
  • Room temperature curing compositions containing tetrafunctional ethoxy-ketoximo silane crosslinkers
    Patent number: 4657967
    Abstract: Compositions of hydroxyl endblocked polydiorganosiloxanes and tetrafunctional ethoxy-ketoximo silane mixtures containing tetraketoximosilane, monoethoxytriketoximosilane, diethoxydiketoximosilane, and triethoxymonoketoximosilane provide one package room temperature compositions. Exposing these compositions to moisture results in a rapid cure without the use of a curing catalyst.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: April 14, 1987
    Assignee: Dow Corning Corporation
    Inventors: Jerome M. Klosowski, Michael D. Meddaugh, Paul B. Sykes, Antony P. Wright
  • Coating material for optical communication glass fibers and fibers made therefrom
    Patent number: 4642265
    Abstract: A silicone coating material of a vinyl containing polyorganosiloxane, a polyorganohydrogensiloxane, a platinum catalyst, and an amorphous silica powder with a primary particle size of less than 0.2 .mu.m is used to make optical communication glass fiber which has a cross-sectional structure of glass fiber core, a layer of the cured silicone coating material, and the exterior of the silicone coating material being covered with a thermoplastic resin material. The optical communication glass fiber made in this manner has a peelable coating such that the silicone coating material can be stripped from the glass fiber core.
    Type: Grant
    Filed: May 11, 1983
    Date of Patent: February 10, 1987
    Assignee: Toray Silicone Co., Ltd.
    Inventor: Toshio Suzuki
  • Method for the dispersement of magnetic filler in one-part toner powder and the composition therefor
    Patent number: 4640881
    Abstract: Mixing into a combination of thermoplastic organic resin and magnetic powder used to make a toner, a silanol methylsiloxane resin readily gives a dry toner powder useful in making photocopies.
    Type: Grant
    Filed: July 15, 1985
    Date of Patent: February 3, 1987
    Assignee: Dow Corning Corporation
    Inventor: William E. Dennis
  • Organopolysiloxane viscous coupler fluids
    Patent number: 4637889
    Abstract: A mixture of an organopolysiloxane fluid, a zirconium-containing organosiloxane compound having at least one zirconium atom and at least one siloxane unit, and a cerium-containing organosiloxane compound having at least one cerium atom and at least one siloxane unit is an organopolysiloxane viscous coupler fluid which can be used in gear systems. These coupler fluids undergo little viscosity increase or decrease and little torque variation at elevated temperature and under high shear over long periods of time.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: January 20, 1987
    Assignee: Toray Silicone Co., Ltd.
    Inventors: Keiichi Kishimoto, Makoto Yoshitake
  • Alkenyl organopolysiloxane and curable composition therefrom
    Patent number: 4631321
    Abstract: Organopolysiloxanes which have end groups of the general formula ##STR1## where R is alkenyl, Z is alkylene, R.sup.1 is a monovalent organic group, and a is 2 or 3, when mixed with organohydrogensiloxane and a platinum catalyst cure to high strength products without the use of a reinforcing filler.
    Type: Grant
    Filed: February 21, 1985
    Date of Patent: December 23, 1986
    Assignee: Toray Silicone Co., Ltd.
    Inventor: Toshio Suzuki
  • Low temperature polymethylsiloxane containing silicon-bonded hydrogen and curable compositions made therewith
    Patent number: 4613659
    Abstract: Polymethylsiloxanes containing silicon-bonded hydrogen exhibit low temperature properties and can be made into gels with which also exhibit low temperature properties or into elastomeric materials. The polymethylsiloxanes have 84 to 96 mole percent dimethylsiloxane units, 0.5 to 6 mole percent trimethylsiloxy units, 2 to 10 mole percent methylsilsesquioxane units, and 0.25 to 3 mole percent monohydrogendimethylsiloxy units and the total mole percent of the trimethylsiloxy units and the monohydrogendimethylsiloxy units is at least 1.5.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: September 23, 1986
    Assignee: Dow Corning Corporation
    Inventors: Chi-long Lee, Myron T. Maxson
  • Method of making a coated quartz optical communications fiber and the coated fiber obtained therefrom
    Patent number: 4609590
    Abstract: Optical communications fibers made by coating with an addition curable composition made from an alkenyl containing organopolysiloxane, a methylhydrogenpolysiloxane, a platinum-type catalyst, and an alkynyl compound provide reduced hydrogen gas generation on quartz fiber and has less transmission loss when the platinum-type catalyst is present in amounts greater than 20 ppm platinum-type metal, the SiH to aliphatically unsaturated is from 0.75/1.00 to 1.05/1.00, and the weight ratio of total alkynyl groups to platinum-type metal is 1.0/1.0 to 15.0/1.00.
    Type: Grant
    Filed: May 17, 1985
    Date of Patent: September 2, 1986
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Toshio Suzuki, Kimio Yamakawa
  • Method for suppressing the generation of hydrogen gas from cured silicone materials
    Patent number: 4605722
    Abstract: Contacting cured addition-type cured silicone material with hydrogen gas suppressing materials which are compounds containing phosphorus, sulfur, nitrogen, or aliphatic unsaturation reduces or eliminated the undesirable hydrogen gas generation. Examples of such hydrogen gas suppressing materials are triethylphosphine, .gamma.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: August 12, 1986
    Assignee: Toray Silicone Co., Ltd.
    Inventor: Toshio Suzuki
  • Method of making membranes for gas separation and the composite membranes
    Patent number: 4602922
    Abstract: Composite membranes suitable for separating gas mixtures are made by in situ crosslinking of aminoorganofunctional polysiloxane, 1 to 9 mol percent aminosiloxane units, with diisocyanate on the surface of a highly porous polymer substrate, such as polysulfone. Using the crosslinked polysiloxane as a gutter layer, a gas separating entity can be coated on the gutter layer to make a double layer composite membrane which has a higher separation factor than the crosslinked polysiloxane and can be used effectively for flat sheet membranes, as well as, hollow fiber membranes.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: July 29, 1986
    Assignee: Research Foundation of State University of New York
    Inventors: Israel Cabasso, Kevin A. Lundy
  • Method for curing organopolysiloxane compositions and the compositions
    Patent number: 4603168
    Abstract: A method of curing certain organopolysiloxane compositions by a combination of heat and exposure to ultraviolet radiation or electron beam provides the ability to use lower temperatures than heat cures alone and shorter cure times than ultraviolet radiation or electron beam alone. The organopolysiloxane compositions are addition-curable and are made up of alkenyl-containing organopolysiloxane, organohydrogensiloxane, a platinum catalyst, an addition-reaction inhibitor selected from alkynol, 3-methyl-3-pentene-1-yne, 3,5-dimethyl-3-hexene-1-yne, methylvinylsiloxane cyclics, benzotriazole, and mixtures thereof, and a photosensitizer.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: July 29, 1986
    Assignee: Toray Silicone Co., Ltd.
    Inventors: Shosaku Sasaki, Yuji Hamada