Patents Represented by Attorney George A. Grindahl
  • Patent number: 5395955
    Abstract: This invention provides method for the preparation of carbinol-modified organopolysiloxane which does not suffer from the secondary reaction problems of the art and which thereby makes possible the production of high-purity carbinol-containing organopolysiloxane.The method involves a platinum-catalyzed addition reaction of an organopolysiloxane having at least 1 silicon-bonded hydrogen atom in each molecule and an organic compound whose molecule contains at least 1 aliphatically unsaturated hydrocarbon group and at least 1 triorganosilyl-blocked carbinol group. Thereafter a desilylation reaction on the organopolysiloxane product is accomplished in an essentially water-free mixture of organic carboxylic acid and alcohol to provide carbinol-modified organopolysiloxane.
    Type: Grant
    Filed: July 29, 1991
    Date of Patent: March 7, 1995
    Assignee: Dow Corning Toray Silicone Company, Ltd.
    Inventors: Tadashi Okawa, Ryuzo Mikami
  • Patent number: 5300237
    Abstract: The amino groups of an organopolysiloxane are reacted with an acrylic acid or ester compound to provide a fiber-treating composition which is almost completely free of yellowing, while at the same time being characterized by an excellent softness and smoothness.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: April 5, 1994
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Isao Ona, Masaru Ozaki
  • Patent number: 5283004
    Abstract: A defoamer composition is obtained when a mixture of certain siloxane-containing components, a finely divided filler, a reaction catalyst and at least one compound having in each molecule at least 1 group expressed by --COR.sup.5, --COOR.sup.6 or --(OR.sup.7).sub.n -- is heated. R.sup.5 and R.sup.6 are the hydrogen atom or saturated or unsaturated monovalent hydrocarbon groups, R.sup.7 is a divalent hydrocarbon group having two to six carbon atoms, and the average value of n is at least 1. The siloxane-containing components comprise resinous polyorganosiloxanes and typically, polydiorganosiloxanes. The heated mixture is useful for defoaming anionic systems.
    Type: Grant
    Filed: February 10, 1989
    Date of Patent: February 1, 1994
    Assignee: Dow Corning Corporation
    Inventor: Takahiro Miura
  • Patent number: 5281658
    Abstract: A composition comprising the reaction product of an aminohydrocarbyl-substituted polydiorganosiloxane and a carboxy-substituted ethylene glycol is an effective composition for treating fibrous materials to enhance the water absorbency, perspiration absorbency, flexibility, lubricancy, and resilient elasticity of the material without inducing the yellowish coloration of said fiber material.The fiber treatment agent composition can be easily emulsified, and the stability of the resulting emulsion is excellent.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: January 25, 1994
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Isao Ona, Masaru Ozaki
  • Patent number: 5248334
    Abstract: A novel primer composition containing an aminoalkyl-substituted trialkoxysilane, a solvent, a carboxylic acid salt of tin and, optionally, an amine-containing organic compound, is applied to a cured silicone substrate and dried to improve the adhesion of a subsequently applied coating. The composition and method are of particular value for painting an elastomeric coating filled with an iron filler.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: September 28, 1993
    Assignee: Dow Corning Corporation
    Inventor: Kenneth C. Fey
  • Patent number: 5210156
    Abstract: Silicone pressure sensitive adhesive compositions which cure in the presence of moisture comprise an adhesive component which bears alkoxy radical-containing curing radicals, a catalyst to accelerate the reaction of moisture with the alkoxy radicals to form siloxane bonds and a multialkoxy silicon compound to stabilize the composition in the solventless state. Curing provides adhesives ranging from pressure sensitive adhesives having improved properties to permanent adhesives. The adhesives are useful for adhering an object to a surface and thereafter improving the bond between the object and the surface by exposure to moisture.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: May 11, 1993
    Assignee: Dow Corning Corporation
    Inventors: Joseph N. Clark, Robert H. Krahnke, Shawn K. Mealey, William J. Schoenherr
  • Patent number: 5208300
    Abstract: Silicone pressure sensitive adhesive compositions which are stable in the absence of moisture but which cure in the presence of moisture comprise an adhesive component which bears alkoxy radical-containing curing radicals and, optionally, a catalyst to accelerate the reaction of moisture with the alkoxy radicals to form siloxane bonds. Curing provides adhesives ranging from pressure sensitive adhesives having improved properties to permanent adhesives. The adhesives are useful for adhering an object to a surface and thereafter improving the bond between the object and the surface by exposure to moisture.
    Type: Grant
    Filed: August 22, 1991
    Date of Patent: May 4, 1993
    Assignee: Dow Corning Corporation
    Inventors: Robert H. Krahnke, Shawn K. Mealey, William J. Schoenherr
  • Patent number: 5169906
    Abstract: A film-forming copolymer is formed by copolymerising 100 parts of a curable polyurethane resin and 10 to 100 parts of an organosilicon compound, consisting essentially of SiO.sub.2, R.sub.3 SiO.sub.1/2 and R'R.sub.2 SiO.sub.1/2 units, the ratio of monovalent units to tetravalent units being from 0.4/1 to 2/1 and from 40 to 90% of and monovalent units being R'R.sub.2 SiO.sub.1/2 units. R is a monovalent hydrocarbon group having up to 8 carbons and R' denotes a OH-terminated polyoxyalkylene group. The invention also includes a method of making fabrics waterproof and permeable to water vapor by coating it with such copolymer.
    Type: Grant
    Filed: March 21, 1991
    Date of Patent: December 8, 1992
    Assignee: Dow Corning Limited
    Inventors: Stephen E. Cray, Martin Rowlands
  • Patent number: 5162451
    Abstract: A homogeneous composition having improved curability contains an organopolysiloxane having at least two carboxyl group-containing hydrocarbon groups in each molecule, a polymeric compound which contains at least 2 hydroxyl groups and at least one oxyalkylene unit and a catalytic quantity of an esterification reaction catalyst. The curable composition has good standing compatiblity and experiences a high degree of curing. When cured the composition is useful, for example, as an antistatic additive.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: November 10, 1992
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventor: Takashi Nakamura
  • Patent number: 5153258
    Abstract: The present invention provides a silicone antifoaming agent composition excellent in the persistence of the foam controlling effect. The silicone antifoaming agent composition comprises a polydiorganosiloxane and silica, which form an antifoaming agent to be improved, and 1 to 200 parts by weight per 100 parts by weight of the sum total of the polydiorganosiloxane plus silica of a lightly crosslinked siloxane having fluidity.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: October 6, 1992
    Assignee: Dow Corning K.K.
    Inventors: Hideki Nakahara, Koichi Aizawa
  • Patent number: 5145932
    Abstract: A curable organopolysiloxane composition comprising an organopolysiloxane having higher alkenyl groups, an organohydrogenpolysiloxane crosslinker, and organopolysiloxane free of alkenyl groups and silicon-bonded hydrogen atoms, a platinum group metal-containing catalyst and an inhibitor therefor provides for the formation of a cured release film. When this composition is coated on the surface of any of various types of substrates, for example, paper, synthetic resin films, fibers, etc., and then heated for 10 to 20 seconds at 80 to 90 degrees Centigrade, it forms a cured film which manifests an extremely good release performance for tacky substances, such as, for example, pressure-sensitive adhesives, and the like, while at the same time evidencing an excellent adherence to the substrate itself. The compositions can be used with synthetic resin films, such as polyolefin, which are easily deformed by heat and with poorly heat-tolerant paper.
    Type: Grant
    Filed: November 21, 1989
    Date of Patent: September 8, 1992
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Shosaku Sasaki, Hiroshi Masaoka
  • Patent number: 5126389
    Abstract: The silicone rubber compositions of the present invention for treatment of fiber structures are cured by a condensation reaction and are thus free from drawbacks of addition reaction curing type. The compositions contain mercaptoalkyl group-containing di- or trialkoxysilanes and aliphatic monohydroxy alcohols. As a result, even when inorganic filler content is increased in dispersion, viscosity stability was excellent, and high-strength films are readily obtained. Condensation reaction-curable silicone rubbers for treatment of fiber structure are provided which have excellent abrasion resistance and a pot life above 8 hours.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: June 30, 1992
    Assignee: Dow Corning Toray Silicone Company, Ltd.
    Inventors: Isao Ona, Masaru Ozaki
  • Patent number: 5118776
    Abstract: Fluorescent organopolysiloxane compounds which bear two or more reactive silicon-bonded sites are useful as durable markers in curable silicone compositions. Having more than one reactive site the compounds participate in the curing reaction of the curable composition and thus do not adversley affect its curing behavior. The resulting fluorescent curable compositions are particularly useful in the preparation of adhesive-release coatings.
    Type: Grant
    Filed: July 29, 1991
    Date of Patent: June 2, 1992
    Assignee: Dow Corning Corporation
    Inventors: Anthony Revis, Maris J. Ziemelis
  • Patent number: 5118535
    Abstract: A method of treating fibrous materials comprises applying a polydiorganosiloxane having at least one unit (a) of the general formula ##STR1## and at least one unit (b) of the general formula ##EQU1## wherein R is a hydroxyl, monovalent hydrocarbon or hydrocarbonoxy group, R' is a divalent hydrocarbon group which optionally contains oxygen and/or nitrogen, R" is a hydrogen atom or an alkyl group optionally containing an oxygen atom in the form of a hydroxyl group and/or a C.dbd.O group, a is 1 or 2, b 2 or 3 and each n from 2 to 8. Treated fibrous materials have improved softness with improved non-yellowing characteristics.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: June 2, 1992
    Assignee: Dow Corning Limited
    Inventors: Stephen E. Cray, Franck A. D. Renauld
  • Patent number: 5110882
    Abstract: A pressure-sensitive adhesive having an excellent tack and adhesive strength is obtained from a composition which contains an alkenyl group-containing silicone polymer, a tackifying silicone resin having less than one percent hydroxyl content, an organohydrogenpolysiloxne curing agent for the alkenyl group-containing silicone polymer and a platinum-containing catalyst. The composition can be cured to a silicone pressure-sensitive adhesive by heating at relatively low temperatures.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: May 5, 1992
    Assignee: Dow Corning Toray Silicone Company, Ltd.
    Inventors: Yuji Hamada, Ichiro Murakami, Shosaku Sasaki
  • Patent number: 5110865
    Abstract: Organopolysiloxane emulsions are prepared by emulsifying components comprising an hydroxy-endblocked organopolysiloxane having an average of ten or more silicon atoms per molecule; an aminoxy group-containing organsilicon compound containing one or more silicon atoms per molecule; a surfactant and water. The process can be conducted advantageously at room temperature to provide emulsion of high-viscosity organopolysiloxanes. The emulsions are useful as, for example, fiber-treatment agents, lubricants, release agents, glass fiber-treatment agents, lustrants, defoamers, and paint components.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: May 5, 1992
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Isao Ona, Masaru Ozaki
  • Patent number: 5108791
    Abstract: 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.
    Type: Grant
    Filed: April 1, 1991
    Date of Patent: April 28, 1992
    Assignee: Dow Corning Corporation
    Inventors: Kyuha Chung, Antony P. Wright, Ming-Hsiung Yeh
  • Patent number: 5107008
    Abstract: Fluorescent organopolysiloxane compounds which bear two or more reactive silicon-bonded sites are useful as durable markers in curable silicone compositions. Having more than one reactive site the compounds participate in the curing reaction of the curable composition and thus do not adversely affect its curing behavior. The resulting fluorescent curable compositions are particularly useful in the preparation of adhesive-release coatings.
    Type: Grant
    Filed: May 2, 1990
    Date of Patent: April 21, 1992
    Assignee: Dow Corning Corporation
    Inventors: Anthony Revis, Maris J. Ziemelis
  • Patent number: 5100976
    Abstract: The subsequent tack and adhesion of a silicone pressure-sensitive adhesive can be improved by incorporating into the adhesive a small amount of an organopolysiloxane resin having a majority of R.sub.3 SiO.sub.1/2 siloxane units and the balance (R.sup.2 O).sub.a SiO.sub.(4-a)/2, preferably SiO.sub.4/2, siloxane units. The resulting composition, when brought into contact with a release liner, such a peelable protective sheet or the backside of the next turn in a roll of tape, have better tack and/or adhesion when separated from that liner than an analogous composition which does not contain the resin.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: March 31, 1992
    Assignees: Dow Corning Corporation, Dow Corning Toray Silicone Company, Ltd.
    Inventors: Yuji Hamada, Akihiko Shirahata, Thomas J. Tangney
  • Patent number: 5100991
    Abstract: The specification describes and claims certain organosilicon compounds and the preparation thereof. The organosilicon compounds comprise (A) a silane according to the general formula R.sup.1.sub.a A.sub.b Si(R"NXR').sub.c or (B) a polysiloxane comprising one or more siloxane units according to the general formula (i) ##EQU1## any remaining units of the polysiloxane being at least predominantly according to the general formula (ii) ##EQU2## A represents a hydroxyl or a hydrolyzable group, R.sup.1 represents a monovalent hydrocarbon group having up to 8 carbon atoms, R.sup.2 represents a hydroxyl group, a group R.sup.1, a group OR.sup.1 or a group COR.sup.1, R.sup.4 represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkenyl group or an aryl group, R' represents a group R.sup.4 or a group X, R" represents a divalent hydrocarbon group which may have nitrogen, oxygen or sulphur present in the carbon chain, X represents a group CO(CHR).sub.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: March 31, 1992
    Assignee: Dow Corning Limited
    Inventors: Stephen E. Cray, James McVie, Paul A. Yianni