Patents Represented by Attorney George A. Grindahl

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  • Coating method and silicone composition for PSA release coating
    Patent number: 4525566
    Abstract: Moisture-curable silicone compositions for adhesive-release coatings comprising an alkoxysilylorganosiloxane, a titanium ester and an aminoorganosiloxane have an adhesive-release force, when cured, which is directly related to the amount and type of aminoorganosiloxane. The compositions are useful for coating a flexible sheet material, such as paper or polymeric film, to provide a surface that will release pressure sensitive adhesive with a pre-selected release force of up to 400 g/in (154 N/m). Thin coatings of the composition cure in as little as 15 seconds when exposed to moisture.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: June 25, 1985
    Assignee: Dow Corning Corporation
    Inventors: Gary R. Homan, David L. Stickles
  • Organopolysiloxane emulsifier compositions and method therefor
    Patent number: 4520160
    Abstract: Siloxane-oxyalkylene block copolymer compositions are prepared by a hydrosilylation reaction, using a saturated higher alcohol, such as isostearyl alcohol, as the reaction solvent. The reaction solvent need not be removed from the resulting block copolymer, particularly when the block copolymer is used as an emulsifier in personal care compositions.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: May 28, 1985
    Assignee: Dow Corning Corporation
    Inventor: Paul L. Brown
  • Silicones bearing acylated diaminohydrocarbyl radicals and method therefor
    Patent number: 4507455
    Abstract: Aminofunctional siloxanes, such as siloxanes bearing ethylenediamine-substituted hydrocarbon radicals, have their amine functionality fully modified by reaction with a monocarboxylic acid anhydride. The modifying functionality includes complete diamide or amide-amine salt formation. The amide-amine salt functionality can further be converted to a mixture of diamide and amide-amine functionality, if desired. The modified aminofunctional siloxanes have utility as components in hair care compositions, textile treating compositions and moldable polymeric compositions.
    Type: Grant
    Filed: May 11, 1984
    Date of Patent: March 26, 1985
    Assignee: Dow Corning Corporation
    Inventors: Thomas J. Tangney, Maris J. Ziemelis
  • Organosiloxane-oxyalkylene copolymers
    Patent number: 4490416
    Abstract: Organosiloxane-oxyalkylene copolymers in which at least one silicon atom of an organosiloxane unit has attached thereto a group ##STR1## in which X is a divalent hydrocarbon group, R is an alkylene group, n is an integer of at least 2, Z is an organic substituent containing an epoxy group, R' is lower alkyl, vinyl or phenyl, R" is alkyl or alkoxyalkyl and a is 0 or 1, at least 40 percent of the total substituents in the copolymer being methyl.The copolymers are film forming and may be applied to continuous or porous substrates from aqueous or non-aqueous solutions.
    Type: Grant
    Filed: May 15, 1984
    Date of Patent: December 25, 1984
    Assignee: Dow Corning Limited
    Inventors: Stephen Westall, James W. White
  • Silicone foam-suppressant compositions
    Patent number: 4486336
    Abstract: Silicone foam suppressant compositions are disclosed consisting essentially of a low viscosity polydimethylsiloxane and a high viscosity polydimethylsiloxane, a certain siloxane resin, and amorphous silica. These foam suppressant compositions can be used to suppress foam in both aqueous and hydrocarbon liquids. Advantageously, these foam suppressant compositions employ less of the resin and less amorphous silica than are normally found in silicone foam suppressants.
    Type: Grant
    Filed: May 26, 1983
    Date of Patent: December 4, 1984
    Assignee: Dow Corning Corporation
    Inventors: Peter G. Pape, David N. Willing
  • Method for enhancing one or more mechanical properties of partially crystalline thermoplastics
    Patent number: 4472556
    Abstract: A method is disclosed for enhancing at least one of the mechanical properties of a partially crystalline thermoplastic by forming a dispersion of a polydiorganosiloxane within the thermoplastic, and extending the resultant dispersion. Ultimate tensile strength, modulus, and ultimate elongation can be enhanced in comparison with the same thermoplastic with no added polydiorganosiloxane and no extension.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: September 18, 1984
    Assignee: Dow Corning Corporation
    Inventors: Jonathan Lipowitz, Robert E. Kalinowski
  • Organopolysiloxane photosensitizers and methods for their preparation
    Patent number: 4467082
    Abstract: Novel photosensitizers are disclosed which are particularly useful in photopolymerizable organopolysiloxane and silicone resins. The photosensitizers are themselves organopolysiloxanes which contain at least one silicon-bonded benzophenone-containing radical. Synthesis methods are disclosed for preparing these photosensitizers which employ, as starting materials, an alkenyloxy-substituted benzophenone and a silicone compound containing at least one silicon-bonded hydrogen atom.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: August 21, 1984
    Assignee: Dow Corning Corporation
    Inventors: Akihiko Shirahata, Keiichi Kishimoto
  • Room temperature stable, heat activated organopolysiloxane compositions
    Patent number: 4465818
    Abstract: Organopolysiloxane compositions which react by way of a hydrosilylation reaction to undergo an increase in viscosity have improved resistance to reaction at room temperature (longer pot life) and/or an improved reaction rate at elevated temperature (shorter cure time) than analogous compositions of the art by incorporating therein an unsaturated hydrocarbon having from 6 to 10 carbon atoms, a terminal acetylenic linkage and an olefinic linkage conjugated therewith. The resulting compositions are useful for preparing various cured siloxanes such as resins, elastomers, gels and foams.
    Type: Grant
    Filed: March 24, 1983
    Date of Patent: August 14, 1984
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Akihiko Shirahata, Shosaku Sasaki
  • Fiber-treating compositions comprising epoxyfunctional silicones and aminofunctional silicone copolymers or carboxyfunctional silicone copolymers
    Patent number: 4459382
    Abstract: Fiber-treating compositions are disclosed which comprise polydiorganosiloxanes bearing epoxy-substituted groups and polydiorganosiloxane bearing amino-substituted groups and polyalkyleneoxide groups, or carboxy-substituted groups and polyalkyleneoxide groups. These compositions confer upon fibers enhanced antistatic properties, water absorbency, stain resistance, softness, smoothness, crease resistance and compression recovery. Advantageously, these enhanced properties are retained upon repeated washing of fibers treated with the compositions of the present invention.
    Type: Grant
    Filed: August 2, 1982
    Date of Patent: July 10, 1984
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Isao Ona, Masaru Ozaki, Yoichiro Taki
  • Treating textile fibres with quaternary salt polydiorganosiloxane
    Patent number: 4448810
    Abstract: Process for the treatment of fibres e.g. of nylon or polyester/cotton in which the fibres are contacted with a polydiorganosiloxane having at least one --OM group, in which M represents H, alkyl or alkoxyalkyl, and at least one quaternary ammonium salt substituent --RN.sup.+ (R").sub.2 R'X.sup.- in which R represents a divalent hydrocarbon or hydrocarbonoxy group, R' represents a monovalent hydrocarbon group or an alkyleneoxy or polyalkyleneoxy group, each R" represents methyl or ethyl and X represents a halogen atom.The treatment facilitates the removal of oily stains during laundering and may be applied in conjunction with other silicones.
    Type: Grant
    Filed: October 15, 1982
    Date of Patent: May 15, 1984
    Assignee: Dow Corning Limited
    Inventor: Stephen Westall
  • Method of coating substrates with polydiorganosiloxanes having lower alkyl substituents to provide release coatings
    Patent number: 4447499
    Abstract: Adhesive-releasing silicone coatings are provided for substrates by applying a composition consisting essentially of a polydiorganosiloxane substituted with methyl, ethyl, propyl, or hydroxyl radicals and an ultraviolet radiation photosensitizer to a substrate, and exposing the applied solution to ultraviolet radiation. By the method of this invention said polydiorganosiloxanes can be crosslinked on substrates to furnish, e.g., adhesive-releasing coatings on paper.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: May 8, 1984
    Assignee: Dow Corning Corporation
    Inventors: Terence J. Swihart, Maris J. Ziemelis
  • Silicone hydraulic fluids and additive concentrates therefor
    Patent number: 4443351
    Abstract: Compositions are disclosed consisting essentially of: (A) a polydiorganosiloxane fluid in which the organic radicals are predominantly or wholly methyl radicals; (B) a chlorendate diester; (C) a lubricant compound which is an antimony or lead compound of a dialkyldithiocarbamate or dialkylphosphorodithioate; and (D) a block copolymer comprising blocks of polydimethylsiloxane and blocks of polybutadiene or hydrogenated polybutadiene. These compositions are useful as concentrates for replenishing polydiorganosiloxane hydraulic fluids that have become depleted in additives (B) and (C), and as hydraulic fluids having improved resistance to settling of the lubricant compound at low temperatures.
    Type: Grant
    Filed: November 1, 1982
    Date of Patent: April 17, 1984
    Assignee: Dow Corning Corporation
    Inventor: Joseph W. Keil
  • Heat curable polydiorganosiloxane compositions having enhanced release upon cure
    Patent number: 4434127
    Abstract: Organic peroxide curable polydiorganosiloxane compositions having improved release from metal molds upon curing are disclosed. In addition to the conventional high molecular weight polydiorganosiloxane gum, reinforcing filler, structure control additives, and curing agent, the improved compositions of this invention contain from 0.05 to 3 parts by weight of a polydiorganosiloxane fluid having methyl groups and carboxyfunctional groups as substituents.
    Type: Grant
    Filed: December 9, 1982
    Date of Patent: February 28, 1984
    Assignee: Dow Corning Corporation
    Inventor: Madhu Baile
  • Fiber-treating compositions comprising two organofunctional polysiloxanes
    Patent number: 4427815
    Abstract: Fiber-treating compositions are disclosed which have, as their effective components, two organopolysiloxanes. One of the organopolysiloxanes contain carboxylic-substituted hydrocarbon groups. The other organopolysiloxane contains polyoxyalkylene-substituted hydrocarbon groups and either amine-substituted hydrocarbon groups or epoxy-substituted hydrocarbon groups. These compositions, when applied to a fiber material and heated, react to provide a durable silicone treatment for the material.
    Type: Grant
    Filed: July 2, 1982
    Date of Patent: January 24, 1984
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Isao Ona, Masaru Ozaki, Yoichiro Taki
  • Silicone-organic coating compositions
    Patent number: 4423095
    Abstract: Homogeneous compositions comprising certain liquid silicone resins, certain silicon-free, film-forming organic polymers and a compatibilizing liquid and a method for preparing preferred homogeneous compositions wherein the compatibilizing liquid is water are disclosed. The homogeneous compositions are useful for coating a substrate to provide a water-resistant coating on the substrate which can function, for example, as a protective coating or as an adhesive-release coating and; accordingly, a method for coating a substrate, such as paper, is also disclosed.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: December 27, 1983
    Assignee: Dow Corning Corporation
    Inventor: John D. Blizzard
  • Method for durable press finish using formaldehyde-free organosilicon compositions and textile therefrom
    Patent number: 4423108
    Abstract: This disclosure relates to a method for imparting durable press characteristics to textile fabrics containing cellulosic fibers. The fabric is impregnated with a homogeneous composition comprising a volatile liquid carrier and certain methoxylated, phenyl-substituted fluid organosilicon polymers, and is subsequently heated to effect crosslinking of the fluid organosilicon polymers.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: December 27, 1983
    Assignee: Dow Corning Corporation
    Inventors: Robert E. Kalinowski, Gary A. Vincent
  • Silicone emulsifier composition, invert emulsions therefrom and method therefor
    Patent number: 4421656
    Abstract: An improved silicone emulsifier composition is disclosed which is particularly useful for preparing thermally stable, solids-free invert emulsions for the deep well-drilling art. The emulsifier composition comprises a surface active polydiorganosiloxane bearing one or more polyoxyalkylene radicals and one or more hydrocarbon radicals having from 6 to 18 carbon atoms and a resin component comprising (CH.sub.3).sub.3 SiO.sub.1/2 siloxane units and SiO.sub.4/2 siloxane units. Improved invert emulsions and a method for their preparation are also disclosed. The invert emulsions comprise the improved silicone emulsifier of this invention as well as a brine discontinuous phase and a liquid hydrocarbon continuous phase.
    Type: Grant
    Filed: December 31, 1981
    Date of Patent: December 20, 1983
    Assignee: Dow Corning Corporation
    Inventors: Philip A. Donatelli, Joseph W. Keil
  • Treating textile fibres
    Patent number: 4421796
    Abstract: The removal of oily soil from textile fibres which have been treated with organosiloxanes, e.g. for improved handle or crease recovery, is facilitated if the fibres are also treated with an organosilane of the general formulaY.sub.3 SiRN.sup.+ (R").sub.2 R'X.sup.-in which Y is hydrocarbon, alkoxy or alkoxyalkoxy, at least one Y being alkoxy or alkoxyalkoxy, R represents a divalent hydrocarbon or hydrocarbonoxy group, R' represents a monovalent hydrocarbon group or an alkyleneoxy or polyalkyleneoxy group, each R" represents methyl or ethyl and X represents a halogen atom.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: December 20, 1983
    Assignee: Dow Corning Limited
    Inventors: Peter M. Burril, Stephen Westall
  • Hydraulic system and hydraulic fluid compositions comprising siloxane-oxyalkylene copolymers
    Patent number: 4420409
    Abstract: Hydraulic fluid compositions are disclosed which have a high boiling point, a high compatibility with standard brake fluid and a high solubility of water. The disclosed hydraulic fluid compositions comprise from 1 to 100 percent by weight of selected siloxane-oxyalkylene copolymers and are suitable for use, for example, as automobile brake fluids.
    Type: Grant
    Filed: December 11, 1981
    Date of Patent: December 13, 1983
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Yoshimasa Fukano, Minoru Yoshizawa
  • Siloxane quaternary ammonium salt preparation
    Patent number: 4417066
    Abstract: Process for the preparation of organosiloxane polymers wherein there are reacted together (A) a silanol-terminated polydiorganosiloxane in which at least 50% of the organic substituents are methyl, and (B) a quaternary ammonium silaneRR'.sub.2 Si--Q--N.sup.+ X.sub.2 YZ.sup.31wherein R' represents an alkoxy or alkoxyalkoxy group, R represents alkyl, phenyl, vinyl or a group as defined for R', Q represents a divalent group, X represents alkyl, aryl, aralkyl or alkaryl, Y represents a monovalent hydrocarbon group or the group (--OM).sub.a OD, wherein M represents an alkylene group having 2 or 3 carbon atoms, a has a value of from 1 to 20 and D represents H, alkyl or acyl, and Z is a halogen atom.The organosiloxane polymers can be crosslinked and are useful for the treatment of textiles.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: November 22, 1983
    Assignee: Dow Corning Limited
    Inventor: Stephen Westall