Patents Represented by Attorney, Agent or Law Firm Timothy J. Troy
  • Silicone pressure sensitive adhesive compositions
    Patent number: 5916981
    Abstract: This invention relates to pressure sensitive adhesive compositions which are obtained by a method comprising reacting a mixture of at least one polydiorganosiloxane, at least one silicone resin copolymer, at least one silanol condensation catalyst, and at least one solvent or plasticizer having a boiling point of at least 200.degree. C., to form a reaction product, and then adding an organic peroxide or azo compound to the resultant reaction product. The silicone pressure sensitive adhesives of this invention are useful in preparing articles such as pressure sensitive tapes, labels, emblems and other decorative or informational signs.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: June 29, 1999
    Assignee: Dow Corning Corporation
    Inventors: Martin Eric Cifuentes, William Neal Fenton
  • Silicone release coating compositions
    Patent number: 5914192
    Abstract: This invention relates to a silicone release coating composition comprising an organopolysiloxane having at least 2 alkenyl groups in each molecule, an organopolysiloxane having at least 3 silicon-bonded hydrogen atoms in each molecule, a carbon-carbon triple bond-functional alcohol having a boiling point at ambient pressure of at least 140.degree. C., an organosilicon compound having at least 3 carbon-carbon triple bond-functional hydrocarbon groups bonded across oxygen to silicon, and a platinum catalyst. The silicone release coating compositions of this invention have excellent bath stability, form a very stable thin film on applicator rolls, cure rapidly even at relatively low temperatures, have stable curing characteristics during the course of bath aging, and exhibit stable release values during the course of bath aging.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: June 22, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Nobuo Kaiya, Taku Koyama, Atsushi Togashi
  • Dispersible silicone compositions
    Patent number: 5908891
    Abstract: The present invention relates to a dispersible silicone composition comprising (I) a silicone composition prepared by reacting (i) a polyorganosiloxane, (ii) a silicon compound, optionally (iii) a finely divided filler, and (iv) a catalytic amount of a compound for promoting the reaction of the other components and (II) mineral oil. The mineral oil is effective as a dispersing agent for the silicone composition (I). The mineral oil-containing compositions are easier to handle, and produce less waste and its dispersion into mineral oil based formulations is more efficient.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: June 1, 1999
    Assignee: Dow Corning Corporation
    Inventors: Kenneth Christopher Fey, James Habermehl
  • Polymer-compatible polymethylsilsesquioxane
    Patent number: 5907019
    Abstract: A silylated polymethylsilsesquioxane, that contains no more than 0.12 residual silanol per Si atom and has a predetermined number average molecular weight from 380 to 2,000 is obtained by silylating the silanol in a starting polymethylsilsesquioxane with the formula(CH.sub.3 SiO.sub.3/2).sub.n (CH.sub.3 Si(OH)O.sub.2/2).sub.mwherein m and n are positive numbers that provide the specified molecular weight and 0.034/(M.times.10.sup.-3).ltoreq.m/(m+n).ltoreq.0.152/(M.times.10.sup.-3)+ 0.10. The silylated polymethylsilsequioxanes of the present invention exhibit compatibility with silicone polymers, e.g., polydimethylsiloxanes. As a consequence, the silylated polymethylsilsesquioxanes of the invention can be used in a wide range of applications as, for example, a reinforcing filler for rubbers.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: May 25, 1999
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Maki Itoh, Akihito Sakakibara-Saitoh, Michitaka Suto
  • Silicone pressure sensitive adhesives
    Patent number: 5869556
    Abstract: The present invention relates to pressure sensitive adhesive compositions which are prepared by heating a mixture of a polydiorganosiloxane, a silicone resin copolymer, and an organic amine compound or metal salt thereof, and then adding an organic peroxide or azo compound to the resultant reaction product. The silicone pressure sensitive adhesives of this invention are useful in preparing articles such as pressure sensitive tapes, labels, emblems and other decorative or informational signs.
    Type: Grant
    Filed: July 5, 1996
    Date of Patent: February 9, 1999
    Assignee: Dow Corning Corporation
    Inventors: Martin Eric Cifuentes, William Neal Fenton
  • Particulate foam control agents and their use
    Patent number: 5861368
    Abstract: A method of providing a foam control agent with 1 to 30 parts of a silicone antifoam and 70 to 99 parts of a zeolite carrier, with the ability to release some of the antifoam within 10 minutes of being dispersed in an aqueous surfactant solution, by deposition 5 to 70% of the antifoam of an organo-polysiloxane polyoxyalkylene copolymer, onto the zeolite carrier not later than depositing the silicone antifoam. Also claimed is the use of the copolymer to achieve that end and compositions where the antifoam is branched or high viscosity. Also claimed is encapsulated agents.
    Type: Grant
    Filed: January 18, 1997
    Date of Patent: January 19, 1999
    Assignee: Dow Corning S. A.
    Inventors: Leonidas Kolaitis, Bertrand Louis Julien Lenoble
  • Method of making silicone pressure sensitive adhesives
    Patent number: 5861472
    Abstract: The present invention relates to a method of making silicone pressure sensitive adhesive compositions comprising the steps of heating a mixture of a polydiorganosiloxane, a silicone resin copolymer, and an equilibration catalyst, and then adding an organic peroxide or azo compound to the resultant reaction product. The silicone pressure sensitive adhesives prepared by the method of this invention are useful in preparing articles such as pressure sensitive tapes, labels, emblems and other decorative or informational signs.
    Type: Grant
    Filed: July 5, 1996
    Date of Patent: January 19, 1999
    Assignee: Dow Corning Corporation
    Inventors: Martin Eric Cifuentes, William Neal Fenton, Bianxiao Zhong
  • Radiation curable siloxane compositions containing vinyl ether functionality and methods for their preparation
    Patent number: 5861467
    Abstract: The present invention relates to radiation curable silicone vinyl ethers and methods for preparing silicone vinyl ethers. More particularly, the present invention relates compositions containing vinyl ether functional silicones and to the preparation and use of silicone vinyl ethers which are curable by addition of photocleavable acids and exposure to ultraviolet or electron beam radiation.
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: January 19, 1999
    Assignee: Dow Corning Corporation
    Inventors: Valerie Joy Bujanowski, Shedric Oneal Glover, Susan Victoria Perz, Maris Jazeps Ziemelis, Gary Rex Homan, Michael Ward Skinner
  • Silicone compositions and uses thereof
    Patent number: 5861453
    Abstract: The present invention relates to a silicone composition prepared by reacting a mixture comprising (i) mineral oil, (ii) a polyorganosiloxane, (iii) a silicon compound, and (iv) a catalytic amount of a catalyst. The compositions of this invention are resistant to phase separation and are useful as foam control compositions in foam producing systems.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: January 19, 1999
    Assignees: Dow Corning Corporation, Dow Corning S.A.
    Inventors: Teresa Lynn Datz-Siegel, Kenneth Christopher Fey, Jacqueline L'Hostis, Franck A Renauld
  • Silicone polyether surfactants
    Patent number: 5830970
    Abstract: The present invention relates to a siloxane-oxyalkylene copolymer surfactant having the formula MD.sub.x D'.sub.y M wherein M represents (CH.sub.3).sub.3 SiO.sub.1/2, or R(CH.sub.3).sub.2 SiO.sub.1/2, D represents (CH.sub.3).sub.2 SiO.sub.2/2, D' represents (CH.sub.3)RSiO.sub.2/2, and the value of x+y is from 48 and 220, and the ratio x/y is from 5 to 15 inclusive. In the above formulae for M and D', R is a polyether-containing substituent selected from the group consisting of(1) --C.sub.n H.sub.2n O(C.sub.2 H.sub.4 O).sub.a (C.sub.3 H.sub.6 O).sub.b R' moieties having weight average molecular weights in the range 2300-3400 and wherein n is 3-4, the ratio a/b is from 0.5 to 1.3 inclusive, R' represents hydrogen, an alkyl group of 1-4 carbon atoms or --C(O)CH.sub.3 and(2) --C.sub.n' H.sub.2n' O(C.sub.2 H.sub.4 O).sub.a' (C.sub.3 H.sub.6 O).sub.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: November 3, 1998
    Assignee: Dow Corning Corporation
    Inventors: Vicky Sue Cobb, Wanda Wells Rauscher, Michael Allen Stanga, Robert Edward Stevens, Robert H. Whitmarsh, Kevin Dale Wiese
  • Silicone foam control compositions
    Patent number: 5824739
    Abstract: The present invention relates to a silicone foam control composition that is able to inhibit foaming only during the rinse stage without impairing a strong foaming action during the wash stage. The silicone foam control composition comprises 80 to 99 weight % of an organopolysiloxane containing amino-functional or carboxyl-functional organic groups and silica with a specific surface area of at least 50 m.sup.2 /g.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: October 20, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hidetoshi Kondo, Masahiro Takahashi
  • Radiation curable compositions containing vinyl ether functionality and methods for their preparation
    Patent number: 5824761
    Abstract: The present invention relates to radiation curable silicone vinyl ethers and methods for preparing silicone vinyl ethers. More particularly, the present invention relates compositions containing vinyl ether functional silicones and to the preparation and use of silicone vinyl ethers which are curable by addition of photocleavable acids and exposure to ultraviolet or electron beam radiation.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: October 20, 1998
    Assignee: Dow Corning Corporation
    Inventors: Valerie Joy Bujanowski, Shedric Oneal Glover, Susan Victoria Perz, Maris Jazeps Ziemelis, Gary Rex Homan, Michael Ward Skinner
  • Mechanical coupling
    Patent number: 5807009
    Abstract: A mechanical coupling comprises an input member, an output member a chamber associated therewith, within the chamber a charge of cured silicone composition in crumb form and a spring biased piston for compressing the charge to an extent sufficient to permit the compressed silicone to convey rotational motion from the input member to the output member.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: September 15, 1998
    Assignee: Dow Corning S. A.
    Inventors: Robert John Michael, Rene Louis Mathieu Andre Paquet
  • Curable silicone compositions
    Patent number: 5789485
    Abstract: The present invention relates to a curable silicone composition comprising (A) an alkenyl-functional organopolysiloxane, (B) a siloxane-modified acrylic polymer, (C) an organohydrogenpolysiloxane, and (D) a hydrosilylation reaction catalyst. The curable silicone compositions of this invention cure into a highly oil-resistant and highly wear-resistant coating and are useful as base compositions for inks for silicone moldings, and are also useful for imparting release against pressure sensitive adhesives while maintaining a degree of printability.
    Type: Grant
    Filed: December 24, 1996
    Date of Patent: August 4, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Akihiko Kobayashi, Takayoshi Otomo, Hiroaki Yoshida
  • Silicone modified vinyl polymers and method for the preparation thereof
    Patent number: 5777052
    Abstract: This invention relates to a silicone-modified vinyl polymer having a weight-average molecular weight from 1,000 to 1,000,000 containing a siloxane group having the formula(--R.sub.a SiO.sub.(3-a)/2)(F(CF.sub.2).sub.b --R.sup.4 --R.sub.c SiO.sub.3-c)/2).sub.x (R.sub.d SiO.sub.(4-d)/2).sub.y (R.sup.5 O.sub.1/2).sub.zwherein R denotes a monovalent hydrocarbon group free of unsaturated bonding, R.sup.4 denotes an alkylene group or an alkyleneoxyalkylene group, R.sup.5 denotes hydrogen or an alkyl group, a is an integer from 0 to 2, b is an integer with a value of at least 4, c is an integer from 0 to 2, d is an integer from 0 to 3, x is a number greater than 0, and y and z are each numbers with values of 0 or more. The polymers of this invention are useful in forming water repellent and oil repellent coatings.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: July 7, 1998
    Assignee: Dow Corning Toray Slicone Co., LTD.
    Inventors: Hideki Kobayashi, Toru Masatomi
  • Silicone pressure sensitive adhesive compositions
    Patent number: 5776614
    Abstract: This invention relates to pressure sensitive adhesive compositions which are obtained by a method comprising reacting a mixture comprising at least one polydiorganosiloxane, at least one silicone resin copolymer, at least one solvent or plasticizer selected from the group consisting of carboxylic acids having at least six carbon atoms and having a boiling point of at least 200.degree.C. and amines having at least 9 carbon atoms and having a boiling point of at least 200.degree.C. to form a reaction product, and then adding an organic peroxide or azo compound to the resultant reaction product. The silicone pressure sensitive adhesives of this invention are useful in preparing articles such as pressure sensitive tapes, labels, emblems and other decorative or informational signs.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: July 7, 1998
    Assignee: Dow Corning Corporation
    Inventors: Martin Eric Cifuentes, William Neal Fenton
  • Silicone compositions and uses thereof
    Patent number: 5777059
    Abstract: The present invention relates to a silicone composition prepared by reacting a mixture of (i) a polyisobutylene compound, (ii) a polyorganosiloxane, (iii) a silicon compound, and (iv) a catalytic amount of a catalyst. The compositions of this invention are resistant to phase separation and are useful as foam control compositions in foam producing systems.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: July 7, 1998
    Assignee: Dow Corning Corporation
    Inventors: Teresa Lynn Datz-Siegel, Kenneth Christopher Fey
  • Particulate foam control agents and their use
    Patent number: 5767053
    Abstract: A method of making a particulate foam control agent comprising 0.001 to 30 parts of silicone antifoam, 45 to 99 parts of a zeolite and 0 to 30 parts of a binder, preferably of a polycarboxylate-type, able to release at least some antifoam from the zeolite in the first 10 minutes of a washing cycle comprises depositing from 0.1 to 500% of the silicone antifoam of an organic surfactant onto the zeolite not later than depositing the silicone antifoam, at least 1 part of surfactant being used per 100 parts of the foam control agent. Also covered are detergent compositions and some foam control agents.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: June 16, 1998
    Assignee: Dow Corning S. A.
    Inventors: Pierre Andre Georges Gustave Germain, Bernhard Ernst Gold, Jan Sybren Hoogland, Bertrand Louis Julien Lenoble, Mark Prince
  • Silicone foam control agents for hydrocarbon liquids
    Patent number: 5767192
    Abstract: The present invention relates to an organopolysiloxane compound having at least one group having the formula ##STR1## wherein R.sup.3 is a divalent hydrocarbon group having from 1 to 20 carbon atoms, R.sup.5 and R.sup.6 are selected from a hydrogen atom or a group having the formula --(C.sub.n H.sub.2n+1) where n has a value from 1 to 30, R.sup.4 is selected from a hydrogen atom, an alkyl group, or an aryl group, d has a value from 0 to 150, and e has a value from 0 to 150, with the proviso that the value of d+e is greater than zero. The organopolysiloxane compounds of this invention reduce the amount of foam in hydrocarbon fuel, especially in diesel fuels and jet fuels. The organopolysiloxane compounds act as foam control agents which display consistent compatibility and miscibility with additives which are frequently present in hydrocarbon fuels.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: June 16, 1998
    Assignee: Dow Corning Corporation
    Inventors: David Robert Battice, Kenneth Christopher Fey, Lenin James Petroff, Michael Allen Stanga
  • Hardenable organopolysiloxane compositions
    Patent number: 5753720
    Abstract: The present invention relates to a hardenable organopolysiloxane composition having a viscosity of less than 30,000 Poise at 25.degree. C. comprising (A) 30 to 75 wt % of a silicone resin, (B) 70 to 25 wt % of a mercapto functional organopolysiloxane, (C) 0.1 to 10 parts by weight per 100 parts by weight of (A)+(B) of a mercapto functional organosilane, and (D) 0.01 to 10 parts by weight per 100 parts by weight of (A)+(B) of a condensation catalyst. The present invention also relates to an article of manufacture obtained by applying the hardenable organopolysiloxane composition to a substrate, exposing the composition and substrate to high energy radiation, and then applying a solid support to the coated substrate.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: May 19, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Junji Nakanishi, Makoto Yoshitake