Diorgano Siloxane Contains Units Of -((r)si(r)-o-)* Where * Is Subscript Two Or More Patents (Class 524/731)
  • Patent number: 5929164
    Abstract: A method of thickening solvents involves reacting (A) an .tbd.Si--H containing polysiloxane with (B) an alpha, omegadiene; conducting the reaction in the presence of a platinum catalyst and (C) a solvent; continuing the reaction until a gel is formed by crosslinking and addition of .tbd.Si--H across double bonds in the alpha, omega-diene; adding additional solvent and a post cure quenching agent to the gel; and subjecting the solvent, the post cure quenching agent, and the gel to shear force until a paste is formed.
    Type: Grant
    Filed: November 5, 1997
    Date of Patent: July 27, 1999
    Assignee: Dow Corning Corporation
    Inventor: Shizhong Zhang
  • Patent number: 5929162
    Abstract: A composition comprising the hydrosilylation addition product of a linear alkenyl functionalized polyorganosiloxane and an M.sup.H Q resin and a low molecular weight silicone when subjected to a new particle size reduction process that includes flow induced shearing provides for components in personal care formulations that have improved spreadability and substance as a consequence of a unique particle size distribution.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: July 27, 1999
    Assignee: General Electric Company
    Inventors: Adam J. Horne, Donald S. Johnson, John A. Kilgour, Richard D. Wang
  • Patent number: 5925469
    Abstract: This invention relates to 1,2-diol functional polysiloxane emulsions obtained by a variety of polymerization methods. This invention further relates to an organopolysiloxane emulsion comprising an organopolysiloxane polymer having pendant organic diol groups, at least one nonionic surfactant, at least one anionic surfactant, and water. The emulsions of this invention are useful as fiber treatment agents and provide softness and hydrophilicity to fibers treated with the emulsion.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: July 20, 1999
    Assignee: Dow Corning Corporation
    Inventor: Ronald Paul Gee
  • Patent number: 5916939
    Abstract: An internal mold release system is provided which comprises (a) a polysiloxane compound; and (b) an amine salt of a carboxylic acid.
    Type: Grant
    Filed: January 20, 1995
    Date of Patent: June 29, 1999
    Assignee: Imperial Chemical Industries PLC
    Inventors: Herbert Russell Gillis, Paul William Mackey
  • Patent number: 5914362
    Abstract: A silicone-based antifoam composition, in the form of an emulsion, is prepared from the reaction of (A) a primary silicone composition and (B) a polydiorganosiloxane having condensable terminal groups in a nonpolar organic medium selected from the group consisting of polyisobutylene and mineral oil. The reaction of the primary silicone composition (A) and the polydiorganosiloxane (B) produces a secondary silicone composition, which forms the discontinuous phase of the emulsion and the nonpolar organic medium forms the continuous phase of the emulsion. The resulting composition of the invention exhibits antifoam efficacy greater than that of the primary silicone composition.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: June 22, 1999
    Assignee: Dow Corning Corporation
    Inventors: Doris Jean Brecht, Russell Allen Elms, Kenneth Christopher Fey, Ronald Paul Gee
  • Patent number: 5911711
    Abstract: A lubricated hypodermic needle of the invention includes an elongate tube with an outside surface, a proximal end, a distal end and an open bore therethrough. The needle has a hub attached to the proximal end of the needle that is used to attach the needle to a fluid handling device. The invention includes a lubricious coating applied to and adherent to the outside surface of the tube. The lubricious coating has a first layer formed from an at least partially cured organosiloxane copolymer and polydimethylsiloxane that has a viscosity greater than about 1000 centistokes. The lubricious coating has a second layer, applied as a secondary operation onto the first layer, that includes a polydimethylsiloxane having a viscosity between about 50 centistokes and about 350 centistokes.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: June 15, 1999
    Assignee: Becton, Dickinson and Company
    Inventor: Brian J. Pelkey
  • Patent number: 5910525
    Abstract: A silicone rubber composition that cures into a highly flame-retardant silicone rubber with excellent electrical insulation characteristics and that does so without sacrificing mechanical strength. The silicone rubber composition comprises:(A) polyorganosiloxane described by average formula R.sub.a SiO.sub.(4-a)/, where R denotes substituted and unsubstituted monovalent hydrocarbon groups and a is a number from 1.95 to 2.05 and having at least 2 silicon-bonded alkenyl groups in each molecule;(B) microparticulate silica;(C) the reaction mixture of(a) a platinum compound and(b) a compound containing a carbon-carbon double bond and a carbon-carbon triple bond;(D) curing agent, and optionally(E) a triazole compound.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: June 8, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Takao Matsushita, Osamu Takuman
  • Patent number: 5908686
    Abstract: A sanitary rubber article coated with a film composed of a siloxane composition comprising the following Component A and the following Component B, Component B being present in a proportion of 0.1 to 5 parts by weight to 100 parts by weight of Component A:Component Aat least one organosiloxane having a recurring unit represented by the following General Formula (I): ##STR1## Component B at least one of organopolysiloxanes having a recurring unit represented by the following General Formula (II): ##STR2## wherein R.sub.1 to R.sub.5, n, x and y are defined in the specification.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: June 1, 1999
    Assignee: Daikyo Gomu Seiko, Ltd
    Inventors: Morihiro Sudo, Tomoyasu Muraki, Eiji Kawachi, Yasushi Kawachi
  • 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
  • Patent number: 5907002
    Abstract: A dental impression silicone composition comprising: (A) 100 parts by weight of an organopolysiloxane having at least two aliphatic unsaturated hydrocarbons in one molecule; (B) from 0.1 to 30 parts by weight of an organohydrogen polysiloxane having at least three hydrogen atoms directly bonded to the silicon atom in one molecule; (C) from 10 to 500 ppm, based on the total amount of the components (A) and (B), of a silicone-soluble platinum compound; (D) from 10 to 500 parts by weight of an inorganic filler; (E) from 5 to 50 parts by weight of a fine silica powder having a BET specific surface area of from 50 to 500 m.sup.2 /g, whose surface is made hydrophobic; (F) from 0.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: May 25, 1999
    Assignee: GC Corporation
    Inventors: Hiroshi Kamohara, Nobuyuki Hattori, Makiko Komoto
  • Patent number: 5904988
    Abstract: Room temperature vulcanizable coating compositions, useful as anti-fouling coatings for marine structures such as ships, are prepared by a method comprising the steps of first blending a particulate reinforcing filler such as silica with a non-reactive polyorganosiloxane oil under high shear conditions, and subsequently combining the resulting masterbatch with at least one reactive polyorganosiloxane having a relatively low viscosity, a condensation catalyst and a crosslinking agent. The resulting compositions are sprayable in the absence of solvents, although solvents may be added if desired.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: May 18, 1999
    Assignee: General Electric Company
    Inventors: Judith Stein, Timothy Brydon Burnell
  • Patent number: 5900450
    Abstract: A method for preparing a three dimensionally connected silica spheres-resin composite, which comprises hydrolyzing and polymerizing a low molecular weight polyalkoxysilane in the presence of an acid catalyst in a mixed solution of the low molecular weight polyalkoxysilane and a water-soluble polymer in a solvent mixture of water and alcohol to obtain a three dimensional connected silica spheres, impregnating the three dimensional connected silica spheres with at least one material selected from resin-forming monomers and resin-forming prepolymers, and curing the material. The composite obtained by the above method retains its strength even at high temperatures where the organic matter undergoes pyrolysis or burnout.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: May 4, 1999
    Assignee: Agency of Industrial Science & Technology
    Inventors: Yuko Tanaka, Muneaki Yamaguchi, Hiromasa Ogawa, Katsutoshi Tanaka
  • Patent number: 5880210
    Abstract: Silicone gels are made by reacting an .tbd.Si--H containing polysiloxane with an alpha-olefin and an alpha, omega-diene. The reaction is conducted in the presence of a platinum catalyst and in the presence of a low molecular weight silicone oil. First, an .tbd.Si--H containing polysiloxane is grafted by long chain alkyl groups from the alpha-olefin onto the .tbd.Si--H containing polysiloxane, and then crosslinked with double bonds in the alpha, omega-diene, in the presence of the low molecular weight silicone oil. The formed silicone gel can then be crumbled into a silicone powder using mechanical force. When additional amounts of the low molecular weight silicone oil are added to the gel, and the silicone oil and the gel are subjected to shear force, a silicone paste can be formed.
    Type: Grant
    Filed: April 1, 1997
    Date of Patent: March 9, 1999
    Assignee: Dow Corning Corporation
    Inventors: William James Schulz, Jr., Shizhong Zhang
  • Patent number: 5877256
    Abstract: The instant invention pertains to a liquid silicone rubber coating composition for application to air bags that is comprised of (A) a diorganopolysiloxane having at least 2 alkenyl groups in each molecule, (B) an organopolysiloxane resin, (C) an inorganic filler, (D) an organohydrogenpolysiloxane having at least 2 silicon-bonded hydrogen atoms in each molecule, (E) a platinum group metal catalyst, and (F) an epoxy group-containing organosilicon compound. The liquid silicone rubber coating composition of the instant invention is capable of coating synthetic air bag fabrics without the use of a diluting solvent and at the same time that has an excellent adhesion to and infiltrability into synthetic air bag fabrics.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: March 2, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Akito Nakamura, Yuichi Tsuji
  • Patent number: 5866653
    Abstract: A curable silicone rubber composition comprising (A) organopolysiloxane comprising at least 2 silicon atom-bonded alkenyl groups in each molecule described by formula R.sub.a SiO.sub.(4-a)/2, where R represents a substituted or unsubstituted monovalent hydrocarbon group and a is a number from 1.95 to 2.05; (B) fine powdery silica; (C) a reaction mixture of (a) a platinum compound and (b) a compound containing an alkynyl group and an alcoholic hydroxy group in each molecule; and (D) a curing agent. The present invention is also a manufacturing method of curable silicone rubber composition. The curable silicone rubber compositions have an excellent flame-retarding property and good tracking resistance and other electrical properties.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: February 2, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Takao Matsushita, Osamu Takuman
  • Patent number: 5861448
    Abstract: A platinum curing organosiloxane composition having improved hysteresis characteristics when cured. The composition requires the presence of a diorganovinylsiloxy terminated polydiorganosiloxane having a viscosity within a range of about 20 Pa.multidot.s to 200 Pa.multidot.s at 25.degree. C. and containing essentially no ethylenically unsaturated hydrocarbon radicals bonded to non-terminal silicon atoms and a diorganovinylsiloxy terminated polydiorganosiloxane having a viscosity within a range of about 0.1 Pa.multidot.s to 200 Pa.multidot.s at 25.degree. C., where from 1 to 5 percent of the non-terminal repeating units of the siloxane comprise a vinyl radical. In addition, the present composition comprises 10 to 30 weight percent of a reinforcing silica filler that has been treated with hexamethyldisilazane and 1,1,3,3-tetramethyl-1,3-divinyldisilazane, and an organohydrogensiloxane resin crosslinker comprising greater than 5 silicon-bonded hydrogen atoms per molecule.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: January 19, 1999
    Assignee: Dow Corning Corporation
    Inventors: Phillip Joseph Griffith, Chu Yat Ho, Diane Marie Kosal
  • Patent number: 5859094
    Abstract: A platinum group-metal curing liquid silicone rubber compositions having improved physical properties such as tear and heat-aging, especially at durometers below about 35 and above about 65. The present inventors have unexpectedly discovered that the addition of diorganohydrogensiloxy end-blocked polydiorganosiloxanes and triorganosiloxy end-blocked polydiorganosiloxanes having a viscosity greater than about 10 Pa.cndot.s at 25.degree. C. to liquid silicone rubber compositions can provide for the described improved properties.
    Type: Grant
    Filed: September 3, 1996
    Date of Patent: January 12, 1999
    Assignee: Dow Corning Corporation
    Inventors: Lori Jean Conway, Phillip Joseph Griffith, Jary David Jensen, Peter Lamont
  • Patent number: 5852095
    Abstract: Disclosed is an aqueous, silicone-modified acrylate polymer emulsion, which is an acrylate polymer emulsion produced by subjecting a monomer system (A) comprising an acrylate monomer selected from the group consisting of an acrylic ester, a methacrylic ester and a mixture thereof to emulsion polymerization in an aqueous medium in the presence of emulsifier (B) selected from the group consisting of a sulfonic acid group-containing ethylenically unsaturated monomer, a sulfonate group-containing ethylenically unsaturated monomer, and a mixture thereof, wherein the acrylate polymer emulsion is silicone-modified using a specific, silicone structure-containing modifier (C) during or after the emulsion polymerization.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: December 22, 1998
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Toyoaki Yamauchi, Yasuyuki Kamiyama
  • Patent number: 5852107
    Abstract: An internal mold release system is provided which comprises (a) a polysiloxane compound; and (b) an amine salt of a carboxylic acid.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 22, 1998
    Assignee: Imperial Chemical Industries PLC
    Inventors: Herbert Russell Gillis, Paul William Mackey
  • Patent number: 5844038
    Abstract: The present invention discloses the use of a polymer chain having at least one carboxylic acid anhydride group as a consistency stabilizer in the base part of a two-part silicone sealant. The base part consists essentially of the consistency stabilizer, 100 parts by weight of a polymeric material having not less than two groups bonded to silicon which are hydroxyl or hydrolysable groups, 5 to 150 parts by weight of filler and, optionally, pigments and/or plasticizers.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: December 1, 1998
    Assignee: Dow Corning S. A.
    Inventors: Dominique Culot, Patrick Deglasse, Sesto Di Marco, Jean Iker
  • Patent number: 5844051
    Abstract: The invention relates to a coating composition intended to be applied to a surface of a high-molecular-weight elastic body. The coating composition includes 100 parts by weight of a mixture of a polyisocyanate and a compound containing therein at least two active hydrogen atoms which are capable of reacting with the polyisocyanate to prepare a polyurethane, and 0.5-100 parts by weight of a diorganopolysiloxane having an average degree of polymerization from 6,000 to 10,000. The coating composition provides a coating film which is superior in durability. Furthermore, this coating film does not generate an uncomfortable noise even when a glass plate wet with water slides on the coating film.
    Type: Grant
    Filed: April 25, 1996
    Date of Patent: December 1, 1998
    Assignee: Kinugawa Rubber Ind. Co., Ltd.
    Inventors: Tetsuo Onzuka, Yoshihiro Itoh
  • Patent number: 5840805
    Abstract: A highly storage-stable room-temperature-curable organopolysiloxane composition that cures to yield a product whose surface resists staining and that does not cause staining of the neighboring regions of the substrate in contact with said cured product. The organopolysiloxane composition is made from a polydiorganosiloxane, an imidazolinyl-functional organosiloxane, a filler, and a crosslinking compound which is a Si-bonded hydrolyzable group-containing organosilane or organosiloxane oligomer.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: November 24, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hisataka Nakashima, Shigeki Sugiyama
  • Patent number: 5840813
    Abstract: Method for homopolymerization of polyorganosiloxane macromonomers having acryloxy or methacryloxy groups. A miniemulsion of a methacryloxy functional polydimethylsiloxane macromonomer was prepared by mixing the macromonomer with a surfactant(s), and subjecting it to a high shear device. The macromonomer was polymerized in the miniemulsion by using a free radical initiator at high temperature. The amount of unreacted macromonomer is very low.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: November 24, 1998
    Assignee: Dow Corning Corporation
    Inventors: Gerald Alphonse Gornowicz, Linda Denise Kennan, Anil Kumar Saxena, Arthur James Tselepis
  • Patent number: 5827921
    Abstract: A novel silicone-based coating composition in the form of an aqueous emulsion is proposed which is capable of giving a rubber-like cured coating film of excellent mechanical strengths and flexibility on the surface of various substrate materials exhibiting high adhesive bonding thereto. The composition comprises:(a) water as the dispersion medium of the emulsion; and(b) a combination of the ingredients as the dispersed phase comprising:(A) 100 parts by weight of an organopolysiloxane having, in a molecule, at least two alkenyl groups bonded to the silicon atoms;(B) from 0.05 to 20 parts by weight of an organohydrogen polysiloxane having, in a molecule, at least two hydrogen atoms directly bonded to the silicon atoms;(C) from 1 to 100 parts by weight of a colloidal silica or a polyorganosilsesquioxane;(D) from 0.5 to 20 parts by weight of a reaction product of an amino group-containing organosilane compound and a carboxylic acid anhydride compound; and(E) from 0.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: October 27, 1998
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoshihito Osawa, Sachiko Nezu, Yoshinobu Takahashi, Satoshi Kuwata
  • Patent number: 5824723
    Abstract: The stain resistant cover composition of the present invention for colored rubber part of a tire is characterized by that it comprises water of 100 parts by weight, polyvinyl alcohol of 1.0 to 50 parts by weight, a vinyl acetate resin emulsion of 15 to 150 parts by weight (solid content), a surfactant of 0.5 to 5.0 parts by weight, and a silicon oil of 0.5 to 5.0 parts by weight. The stain resistant protective film of the present invention for colored rubber part of a tire is used as a stain resistant protective film for a colored portion in the side wall part of a tire, wherein the above protective film comprises polyvinyl alcohol, a vinyl acetate resin emulsion, a surfactant, and a silicon oil.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: October 20, 1998
    Assignee: Bridgestone Corporation
    Inventors: Masashi Yano, Yo Uchida
  • Patent number: 5814695
    Abstract: Condensation curable silicone mold making compositions containing an olefin or acetylene polymerization inhibitor have a longer useful life for making casts from curable resins comprising a polymerizable olefin relative to compositions where such a polymerization inhibitor is absent. Particularly preferred polymerization inhibitors are the esters of thiodipropionic acid and silicon polysulfides.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: September 29, 1998
    Assignee: General Electric Company
    Inventors: John J. Fitzgerald, Bruce C. Kuhl, Philip J. McDermott, Robert A. Smith
  • Patent number: 5789084
    Abstract: A curable liquid silicone rubber coating composition is disclosed. The curable composition of the invention exhibits excellent infiltrability and can be used to for thin coatings on synthetic fabrics, without using a dilution solvent. The cured composition is tackfree coating film with excellent adherence to synthetic fabrics. The curable composition includes: (A) a diorganopolysiloxane that contains at least 2 alkenyl groups in each molecule; (B) an organopolysiloxane resin; (C) an inorganic filler; (D) an organohydrogenpolysiloxane that contains at least 2 silicon-bonded hydrogen atoms in each molecule; (E) a platinum group catalyst; (F) an epoxy-functional organosilicon compound; and (G) an organotitanium compound.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: August 4, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Akito Nakamura, Yuichi Tsuji
  • 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
  • Patent number: 5777002
    Abstract: A method for preparing organopolysiloxane bases with high levels of fillers. The present inventors have found that by mixing the components of the base at a temperature below about 60.degree. C. for a period of time sufficient to effect essentially a homogeneous blend, a base composition is formed which can be further blended with a platinum group metal-containing catalyst, an organohydrogensiloxane, and optionally an inhibitor to form a curable liquid silicone rubber (LSR) composition. The curable LSR composition has improved flow characteristics and improved shelf life when compared to similar materials where the base is prepared at temperatures above about 60.degree. C. The improved flow characteristics allows larger quantities of fillers to be incorporated into the curable LSR composition while still maintaining acceptable flow characteristics.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: July 7, 1998
    Assignee: Dow Corning Corporation
    Inventors: Lori Jean Conway, Thomas Edward Gray, Phillip Joseph Griffith, William James Schulz, Jr.
  • Patent number: 5760116
    Abstract: A composition comprising the hydrosilylation addition product of a linear alkenyl functionalized polyorganosiloxane and an M.sup.H Q resin and a low molecular weight silicone when subjected to shearing provides for components in personal care formulations that have improved spreadability and substance.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: June 2, 1998
    Assignee: General Electric Company
    Inventors: John A. Kilgour, Virginia Van Valkenburgh Powell
  • Patent number: 5741834
    Abstract: The present invention provides novel vinyl containing organopolysiloxane elastomers which possess excellent low compression set and heat aging characteristics and which can advantageously be formulated into liquid silicone elastomer moldable compositions.
    Type: Grant
    Filed: October 10, 1996
    Date of Patent: April 21, 1998
    Assignee: General Electric Company
    Inventors: Brian John Ward, Edward Matthew Jeram, Richard Albert Striker
  • Patent number: 5738857
    Abstract: Cosmetic compositions which comprise waxy organosiloxanes, which are solid at room temperature, of the formulaR.sup.1 R.sub.2 Si--O--SiR.sub.2 R.sup.1 (I),in whichR can be identical or different and represents an alkyl radical having 1 to 4 carbon atoms andR.sup.1 can be identical or different and represents a linear alkyl radical having at least 16 carbon atoms,volatile organosiloxanes chosen from the group comprising hexamethyldisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and mixtures thereof, and optionally other substances.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: April 14, 1998
    Assignee: Wacker-Chemie GmbH
    Inventors: Johann Sejpka, Annemarie Huber
  • Patent number: 5731402
    Abstract: A process for the production of biodegradable aliphatic polyester particles by (co)polymerizing 2-oxetanone or a mixture containing at least 80% by weight of 2-oxetanone and up to 20% by weight of a cyclic ester or cyclic ether other than 2-oxetanone in the presence of a polymerization initiator supported on a carrier in which an ion polymerization initiator is supported on poly(2-oxetanone) in a liquid medium having a solubility parameter of about 15 to about 18 MPa.sup.1/2 and being capable of dissolving 2-oxetanone, and in a polymerizing apparatus having an internal surface formed of a material which is free of polarity or whose polarity is very small, to form a particulate aliphatic polyester; and a biodegradable aliphatic polyester melt-extrusion film, which comprises the biodegradable aliphatic polyester having a weight average molecular weight of 20,000 to 2,000,000, and having a water vapor transmission rate of 300 to 700 g/m.sup.2.24 hours.25 .mu.m and heat-fusing strength of 500 to 5,000 gf/15 mm.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: March 24, 1998
    Assignee: Tokuyama Corporation
    Inventors: Haruo Nishida, Mitsuhiro Yamashita, Norikazu Hattori
  • Patent number: 5721309
    Abstract: A water based coating composition provides a stain resistant layer which adheres well to a substrate and is resistant to chemical attack by common household cleaning solvents such as isopropyl alcohol. The coating composition has a very low volatile organic compound content, thus providing an environmentally desirable alternative to organic solvent based coatings. The low volatile organic compound content of the composition substantially or completely eliminates the problems and expenses associated with solvent recovery for meeting chemical emission standards, and the potential for human exposure to solvent vapor is substantially eliminated or significantly reduced. The coating composition is aqueous based and incorporates a crosslinkable acrylic polymer latex, an amino resin crosslinking agent and a crosslinking catalyst. The polymer, crosslinking agent and catalyst are dispersed and/or solubilized in an aqueous medium.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: February 24, 1998
    Assignee: GenCorp Inc.
    Inventors: Satish C. Sharma, John P. Kovalchin, Raymond J. Weinert
  • Patent number: 5719220
    Abstract: A highly filled, curable composition comprising (A) an addition polymerizable organic liquid which on curing forms a solid polymer, (B) 20 to 80% by volume of a finely divided particulate inorganic filler having a weight average particle size of less than 50 microns but not having a BET surface area of more than 30 m.sup.2 .multidot.cm.sup.-3, and (C) 0.05 to 0.5% by weight of a polydimethylsiloxane and molded composite articles produced therefrom are disclosed. Such articles exhibit improved resilience to thermal shock.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: February 17, 1998
    Assignee: Imperial Chemical Industries PLC
    Inventor: Neil Kirtley
  • Patent number: 5717010
    Abstract: The present invention provides novel vinyl containing organopolysiloxane elastomers which possess excellent low compression set and heat aging characteristics and which can advantageously be formulated into liquid silicone elastomer moldable compositions.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: February 10, 1998
    Assignee: General Electric Company
    Inventors: Brian J. Ward, Edward M. Jeram, Richard A. Striker
  • Patent number: 5716548
    Abstract: The invention provides polyurethane components and compositions capable of providing internal mold release properties in SRIM applications. The polyol composition of the invention has an isocyanate reactive polyol (A) having a number average molecular weight from 100 to about 10,000 and an effective amount of internal mold release composition (B) having a silicon-containing polymer (a) and an epoxidized ester (b). The invention further provides an SRIM polyurethane composition useful in the preparation of molded polyurethane articles having internal mold release properties, the composition comprising an isocyanate component (I) and the isocyanate reactive polyol composition (Component (II)) disclosed above. In another aspect of the invention, the invention provides methods of using the claimed compositions as well as the rigid cellular polyurethane SRIM articles resulting from such processes.
    Type: Grant
    Filed: April 23, 1996
    Date of Patent: February 10, 1998
    Assignee: BASF Corporation
    Inventors: Richard P. Harrison, Bari W. Brown, Richard C. Rossio, Gladys M. Aviles, Edward M. Dexheimer, David Ho
  • Patent number: 5714529
    Abstract: Novel contrast media for use in ultrasonic imaging are described. Such contrast media may be comprised of an aqueous solution of one or more biocompatible polymers, wherein said biocompatible polymers are coated with and/or in admixture with at least one silicon containing compound. Alternatively, the contrast media may be comprised of an aqueous solution of one or more biocompatible synthetic polymers, or an aqueous solution of cellulose. The contrast media may be employed, if desired, with anti-gas agents and/or suspending agents.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: February 3, 1998
    Assignee: ImaRx Pharmaceutical Corp.
    Inventors: Evan C. Unger, Guanli Wu
  • Patent number: 5707613
    Abstract: A method of spontaneously forming a highly stable clear microemulsion by combining (i) water; (ii) a volatile cyclic methyl siloxane or volatile linear methyl siloxane; and (iii) a silicone polyether surfactant. The amounts of each component are such that the composition is in the form of a microemulsion. The volatile methyl siloxane is present in the microemulsion in the form of particles having an average diameter of less than about 100 nanometers. The microemulsion is useful in personal care products.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: January 13, 1998
    Assignee: Dow Corning Corporation
    Inventor: Randal Myron Hill
  • Patent number: 5708054
    Abstract: A two-part composition comprising a liquid composition (I) composed of the components (A), (C), and (E) described below and a liquid composition (II) composed of the components (A) (B), (C), and (D) described below, which yield upon mixing a curable liquid silicone composition comprising(A) an alkenyl-substituted poyorganopolysiloxane;(B) a hydrogen-substituted organopolysiloxane in an amount that provides 0.3 to 10 moles silicon-bonded hydrogen from component (B) per 1 mole alkenyl in component (A);(C) an inorganic filler that has a specific surface of 50 to 500 m.sup.2 /g;(D) an alkoxy-substituted organopolysiloxane; and(E) platinum catalyst in a quantity sufficient to cure the instant composition;wherein the curable silicone composition that results when liquid composition (I) and liquid composition (II) are mixed, is thixotropic and has a viscosity, immediately upon the mixing that is greater than the viscosity of liquid composition (II).
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: January 13, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Katsutoshi Mine, Takae Takeuchi, Kimio Yamakawa
  • Patent number: 5705562
    Abstract: A method of spontaneously forming a highly stable clear microemulsion by combining (i) water; (ii) a volatile cyclic methyl siloxane or volatile linear methyl siloxane; and (iii) a silicone polyether surfactant. The amounts of each component are such that the composition is in the form of a microemulsion. The volatile methyl siloxane is present in the microemulsion in the form of particles having an average diameter of less than about 100 nanometers. The microemulsion is useful in personal care products.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: January 6, 1998
    Assignee: Dow Corning Corporation
    Inventor: Randal Myron Hill
  • Patent number: 5700869
    Abstract: The invention provides polyurethane components and compositions capable of providing internal mold release properties in SRIM applications. The polyol composition of the invention has an isocyanate reactive polyol (A) having a number average molecular weight from 100 to about 10,000 and an effective amount of internal mold release composition (B) having a silicon-containing polymer (a) and an at least diester functional compound (b) which is the reaction product of (i) an aromatic carboxylic acid, and (ii) alcohols having from 2 to 30 carbons. The invention further provides an SRIM polyurethane composition useful in the preparation of molded polyurethane articles having internal mold release properties, the composition comprising an isocyanate component (I) and the isocyanate reactive polyol composition (component (II)) disclosed above.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: December 23, 1997
    Assignee: BASF Corporation
    Inventor: James Turnbach
  • Patent number: 5698653
    Abstract: A non-corrosive translucent room temperature vulcanizable silicone composition consists essentially of an alkyl alkoxy stopped diorganopolysiloxane, a polyalkoxysilane crosslinking agent and a tetra alkyl titanate condensation cure catalyst.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: December 16, 1997
    Assignee: General Electric Company
    Inventors: Gary M. Lucas, Jeffrey H. Wengrovius
  • Patent number: 5691399
    Abstract: Disclosed are sealant compositions having excellent slump and spew resistant, even at relatively high operating temperatures for electrical connectors. The sealants, which are flowable at such elevated temperatures, comprise two essential components: elastomeric thermoplastic polymer, preferably an organic polymer composite comprising diblock and triblock copolymers, and extender for the polymer. The extender may comprise a primary and a secondary extender, such as polybutene oil and mineral oil, respectively.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: November 25, 1997
    Assignee: The Whitaker Corporation
    Inventors: Francis Frederick Koblitz, Thomas John Lynch, Ricky Charles Mellinger
  • Patent number: 5686526
    Abstract: The invention provides polyurethane components and compositions capable of providing internal mold release properties in SRIM applications. The polyol composition of the invention has an isocyanate reactive polyol (A) having a number average molecular weight from 100 to about 10,000 and an effective amount of internal mold release composition (B) having a silicon-containing polymer (a) and an at least diester functional compound (b) which is the reaction product of (i) an aromatic carboxylic acid, and (ii) alcohols having from 2 to 30 carbons. The invention further provides an SRIM polyurethane composition useful in the preparation of molded polyurethane articles having internal mold release properties, the composition comprising an isocyanate component (I) and the isocyanate reactive polyol composition (component (II)) disclosed above.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: November 11, 1997
    Assignee: BASF Corporation
    Inventor: James Turnbach
  • Patent number: 5686187
    Abstract: The invention provides a molded polyurethane article having internal mold release properties. The polyurethane article comprises the reaction product of an isocyanate component (I) and an isocyanate-reactive polyol component (II). The polyol component comprises an isocyanate-reactive polyol (A) having a molecular weight from 100 to about 10,000 and an effective amount of an internal mold release composition (B). The internal mold release composition comprises a silicon-containing polymer (a) and a diester functional compound (b). The diester compound comprises the reaction product of an aromatic dicarboxylic acid (i) and an alcohol having from 2 to 30 carbons.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: November 11, 1997
    Assignee: BASF Corporation
    Inventor: James Turnbach
  • Patent number: 5679734
    Abstract: The present invention relates more specifically to silicone compositions which can be crosslinked into an adhesive gel by hydrosilylation at room temperature, as well as to the gels thus obtained. One of the objects of the invention is to produce, easily and rapidly, gels having viscoelastic qualities, low-temperature physical stability and adhesion properties.This objective is achieved by virtue of the compositions comprising:a polyorganosiloxane POS (I) of the SiVi type (Vi=vinyl);a POS (II) of the SiH type;an extender POS (III) of the .alpha.,.omega.-hydrogen, SiH type; and, optionally, a diluent POS (IV) of the polydimethylsiloxane type; where ##EQU1## Application: protection of electronic equipment (potting), adhesives, prostheses.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: October 21, 1997
    Assignee: Rhone-Poulenc Chimie
    Inventors: Pierre-Michel Peccoux, Christian Pusineri
  • Patent number: 5679739
    Abstract: Oligomers wherein phenylalkylsiloxane units comprise at least a portion of the repeating units increase the ability to penetrate porous substrates that is exhibited by crosslinkable liquid organosiloxane compositions containing polyorganosiloxanes when the oligomer exhibits limited compatibility with the crosslinkable polyorganosiloxane(s) present in the curable organosiloxane composition.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: October 21, 1997
    Assignee: Dow Corning Corporation
    Inventors: Kent Robert Larson, Gerald Lawrence Witucki
  • Patent number: 5677411
    Abstract: Secondary contact adhesion or self-bonding in cured liquid injection molding silicone compositions is reduced by the inclusion in the composition of an inhibitor compound selected from the group consisting of phenyl fluids, titanate esters, and silicate esters.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: October 14, 1997
    Assignee: General Electric Company
    Inventors: Brian J. Ward, Robert A. Smith, Richard A. Striker
  • Patent number: 5674937
    Abstract: A crosslinked polysiloxane dispersion comprising a product of a siloxane polymer or polymer mixture having a viscosity of greater than 5000 mPa.s but less than 500,000 mPa.s, and at least one self catalyzing crosslinker, a surfactant, and water.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: October 7, 1997
    Assignee: Dow Corning Corporation
    Inventors: Daniel Trent Berg, Eric Jude Joffre