Patents Examined by Margaret W. Glass
  • Patent number: 6001929
    Abstract: There is disclosed a polycarbonate resin composition which comprises an (A) polycarbonate-polyorganosiloxane copolymer, a (B) polycarbonate resin and a (C) polytetrafluoroethylene which has fibril forming capability and an average molecular weight of at least 500,000 wherein the amount of the polyorganosiloxane moiety contained in the component (A) is 0.1 to 2.0% by weight based on the total amount of the components (A) and (B). The resin composition is excellent in flame retardancy, thermal stability and fluidity while preventing melt dripping at the time of combustion. Accordingly, the resin composition is favorably used in the application field of office automation machinery and equipment, electric and/or electronic field, etc.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: December 14, 1999
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Akio Nodera, Jiro Chiba
  • Patent number: 6001486
    Abstract: A transparent substrate having a glare reducing diffuser surface coating on its outer surface forms a faceplate for attachment to a screen for a cathode ray tube or other display device. The coating has a preferred resolution of at least about 3 lines per millimeter, and the substrate may include an index matching adhesive/medium for attaching said faceplate to a cathode ray tube screen. The diffuser surface coated substrate is bendable and overcoatable with functional coatings such as transparent conductor and/or abrasion resistant coatings. Alternately, the diffuser surface coating may be applied over such functional coatings which are applied to the substrate.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: December 14, 1999
    Assignee: Donnelly Corporation
    Inventors: Desaraju V. Varaprasad, Craig A. Dornan, Catherine A. Getz
  • Patent number: 5998562
    Abstract: The present invention relates to triazine-containing organosilicon compounds having units of the formulaA.sub.a R.sub.b X.sub.c SiO.sub.(4-a-b-c)/2 (I),whereR is identical or different and denotes a hydrogen atom or a monovalent substituted or unsubstituted hydrocarbon radical, having 1 to 26 carbon atoms, preferably 1 to 18 per radical,X is identical or different and is a halogen atom, a chlorine atom or a radical of the formula --OR.sup.1, where R.sup.1 denotes an alkyl radical, having 1 to 18 carbon atoms, preferably 1 to 8 per radical and which may be substituted by an ether oxygen atom,a is 0 or 1, preferably 0.01-0.5b is 0, 1, 2 or 3, preferably 0.5-3.0c is 0, 1, 2 or 3, preferably 0.0-2.0 and the sum a+b+c.ltoreq.4, preferably 0.1-3.5, andA is a radical of the formula ##STR1## where R.sup.
    Type: Grant
    Filed: July 7, 1997
    Date of Patent: December 7, 1999
    Assignee: Wacker-Chemie GmbH
    Inventors: Guenter Mahr, Jochen Dauth, Bernward Deubzer, Monika Ott, Petra Gratzl, Hans Lautenschlager
  • Patent number: 5986032
    Abstract: Organometallic linear polymers containing metallocene, inorganic units (such as silicon and boron), and acetylenic units which display superb processability, and which are readily converted to a thermoset through the acetylenic groups, yielding high temperature thermosetting polymers and ceramics that exhibit outstanding long-term thermal (high char yield) and magnetic properties and synthesis of these.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: November 16, 1999
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Teddy M. Keller, Eric J. Houser
  • Patent number: 5977280
    Abstract: A method of thickening solvents involves reacting (A) an .ident.Si--H containing polysiloxane with (B) an alkene such as an alpha, omega-diene; 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 .ident.Si--H across double bonds in the alpha, omega-diene; adding additional solvent and a post cure terminating agent to the gel; and subjecting the solvent, the post cure terminating agent, and the gel to shear force until a paste is formed. The post cure terminating agent is an amino acid ester, preferably a sulfur containing amino acid ester, such as methionine methyl ester, methionine ethyl ester, cysteine methyl ester, cysteine ethyl ester, and cystine dimethyl ester.
    Type: Grant
    Filed: November 5, 1997
    Date of Patent: November 2, 1999
    Assignee: Dow Corning Corporation
    Inventors: Donald Anthony Kadlec, William James Schulz, Jr., Shizhong Zhang
  • Patent number: 5965672
    Abstract: An unsaturated polyester resin composition contains a silicone-containing macro-azo-initiator and/or a silicone-containing block copolymer obtained by copolymerizing the silicone-containing macro-azo-initiator with a nonionic monomer.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: October 12, 1999
    Assignees: Osaka Municipal Government, Wako Pure Chemical Industries, Ltd.
    Inventors: Yasuyuki Agari, Masayuki Shimada, Akira Ueda, Hideo Takeuchi, Nobutaka Shimamura
  • Patent number: 5965664
    Abstract: An aqueous silane composition for increasing the resistance to penetration by aqueous media of an absorbent substrate. The composition includes about 1.7 wt. % of an emulsion of an amino functional silicone having an amine content of about 70 mg KOH/gm; up to about 80 wt. % of a hydrolyzable silane; up to about 5 wt. % of an amino functional silane; and the balance water. The resulting composition is hydrolytically stable for a long period without requiring a separate buffering compound while, at the same time, may be prepared in much higher concentrations to reduce packaging and shipping costs.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: October 12, 1999
    Assignee: Lindley Laboratories, Inc.
    Inventors: William Clarke Lindley, James Thomas Lindley, Jr., Herman Gustav Weiland
  • Patent number: 5962581
    Abstract: A method of forming a pattern comprising the steps of forming a film of an organosilane compound comprising a polysilane having a repeating unit represented by the following general formula (1) on a substrate, irradiating an actinic radiation onto a predetermined portion of the film of the organosilane compound formed on the substrate, and removing the predetermined portion of the film irradiated by the actinic radiation by dissolving it with an aqueous alkaline developing solution. ##STR1## wherein Ar is a substituted or non-substituted aryl group.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: October 5, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shuzi Hayase, Yoshihiko Nakano, Rikako Kani, Mao Ito, Satoshi Mikoshiba, Takeshi Okino, Sawako Fujioka
  • Patent number: 5952445
    Abstract: The present invention relates to compounds which are substantially free from isocyanate groups, have an alkoxysilane group content (calculated as Si, MW 28) of 1 to 6% by weight, based on the weight of the compounds, and containing sufficient chemically incorporated hydrophilic groups to form a stable dispersion with water, wherein the alkoxysilane groups are incorporated as the reaction products ofa) a polyisocyanate component having a minimum average functionality of 2.4 and containing at least 50% by weight of polyisocyanate adducts andb) compounds containing secondary amino groups and alkoxysilane groups.The present invention also relates to the use of these compounds for the preparation of coatings, sealants and adhesives.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: September 14, 1999
    Assignees: Bayer Corporation, Bayer Aktiengesellschaft
    Inventors: Richard R. Roesler, Lutz Schmalstieg
  • Patent number: 5952442
    Abstract: A silicone copolymer for use in an electrophotographic process is disclosed. This composition includes a specifically-defined heat-stable silicone oil-silicone wax copolymer. The copolymer has a melting point such that it is liquid on the hot fuser roll, but solidifies at room temperature on the printed page. A random silicone copolymer, in the form of a paste or pliable caulk, which is useful for sealing leaks in toner cartridges is also disclosed. Finally, the method for preparing these copolymers is disclosed.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: September 14, 1999
    Assignee: Lexmark International, Inc.
    Inventors: Kathryn E. Dowlen, Bradley L. Beach, Steven A. Curry, Earl D. Ward, II
  • Patent number: 5948427
    Abstract: Flowable polymeric microparticulate surgical adhesive formulations are provided which can be activated at the site of the repair to produce a cohesive material with tissue bonding properties to adjacent tissues. The formulation may be activated at the site of repair by mechanical shear forces, heat, ultrasound, UV, or other forms of energy directed at the site.
    Type: Grant
    Filed: April 25, 1996
    Date of Patent: September 7, 1999
    Assignee: Point Medical Corporation
    Inventors: Ronald K. Yamamoto, Robert E. Short
  • Patent number: 5948856
    Abstract: Curable organosiloxane compositions that cure by a platinum group metal catalyzed hydrosilation reaction to yield machinable elastomers exhibiting a high resistance to erosion contain an alkenyl-functional organosiloxane copolymer as the reinforcing agent together with quartz and organic or inorganic microspheres as the non-reinforcing filler. The concentration and density of the microspheres are preferably within specified limits.
    Type: Grant
    Filed: January 12, 1998
    Date of Patent: September 7, 1999
    Assignee: Dow Corning Corporation
    Inventors: Donnie Ray Juen, Michael G. Krueger, Lawrence Joseph Rapson
  • Patent number: 5945043
    Abstract: Novel hollow silicone resin particles, having an average particle size of 0.1 to 100 .mu.m are disclosed. The silicone resin particles comprise a skin formed from thermoplastic silicone resin configured in the shape of a hollow capsule. The hollow thermoplastic silicone resin particles are prepared by spraying a dispersion of water and thermoplastic silicone resin dissolved in solvent into hot gas. The hot gas evaporates the solvent and water and at the same time causes solidification of the thermoplastic silicone resin while it is in the spray state, so as to form a plurality of hollow particles therefrom.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: August 31, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Mitsuo Hamada, Koichi Ozaki, Toyohiko Yamadera
  • Patent number: 5945471
    Abstract: There is disclosed a composite powder composition which has excellent flowability and water repellency and finds utility as a modifier for paints and organic resins, said composition comprising:(A) 100 parts by weight of a cured silicone powder that has an average particle size of 0.1 to 500 micrometers and contains 0.5 to 80 weight percent of a non-crosslinking oil; and(B) 0.1 to 100 parts by weight of a microfine inorganic powder, said inorganic powder being coated on the surface of said cured silicone powder.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: August 31, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Yoshitsugu Morita, Atsushi Sasaki
  • Patent number: 5945476
    Abstract: The present invention relates to aqueous two-component compositions containinga) compounds which are substantially free from isocyanate groups, have an alkoxysilane group content (calculated as Si, MW 28) of 1 to 6% by weight, based on the weight of the compounds, and contain sufficient chemically incorporated hydrophilic groups to form a stable dispersion with water, wherein the alkoxysilane groups are incorporated as the reaction products ofi) a polyisocyanate component having a minimum average functionality of 2.4 and containing at least 50% by weight of polyisocyanate adducts andii) compounds containing secondary amino groups and alkoxysilane groups, andb) polyhydroxy compounds containing ester and/or carbonate groups and having a urethane group content of less than 5% by weight, based on the weight of the polyhydroxy compounds.The present invention also relates to coatings, adhesives and sealants prepared from these aqueous compositions and to compounds a) containing urea and alkoxysilane groups.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: August 31, 1999
    Assignees: Bayer Corporation, Bayer Aktiengesellschaft
    Inventors: Richard R. Roesler, Poli Yu, Lutz Schmalstieg
  • Patent number: 5942073
    Abstract: Adhesive/adherend systems of this invention comprise a siloxane-modified adhesive component and a siloxane-modified adherend component. The siloxane-modified adhesive component is prepared by combining an epoxy resin with an organosilane ingredient, a polysiloxane resin, an amine hardener, an organometallic catalyst, a base catalyst, and any thickener and extender pigment. The siloxane-modified adherend component is prepared using a polysiloxane resin and may also contain other resins such epoxy, phenolic, polyester, vinyl ester, polyurethane, polyamide, melamine, furan, acrylate, thermoplastic polyvinyl chloride, polyethylene, polycarbonate, ABS, polystyrene, ethylene vinyl acetate, polyvinyl acetate, polyamide, and polypropylene resins.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: August 24, 1999
    Assignee: Ameron International Corporation
    Inventors: Norman R. Mowrer, John F. Kane, Colin G. Hull
  • Patent number: 5942592
    Abstract: A solvent-soluble siloxane polyimide comprising a copolymer obtained by reaction of a diamine compound mixture comprising a diaminopolysiloxane, an alicyclic diamine and an aromatic diamine with an aromatic tetracarboxylic acid anhydride, followed by polyimidization reaction of the resulting polyamic acid forms a heat-resistant adhesive by adding an epoxy resin, a diamine-based curing agent and an organic solvent thereto, The formed adhesives provides a distinguished curling resistance without any warp when the resulting siloxane polyimide soluble in ordinary organic solvents is used as a main component of the adhesive for bonding between a base material and a copper foil of a flexible printed substrate.
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: August 24, 1999
    Assignee: Nippon Mektron, Limited
    Inventors: Dong Zhao, Hiroshi Sakuyama, Tomoko Katono, Lin-chiu Chiang, Jeng-Tain Lin
  • Patent number: 5942574
    Abstract: A method of continuous emulsification that can emulsify high-viscosity organopolysiloxane gums and is capable of continuous mass production. A compounding extruder is used whose barrel 1 contains at least 2 mixing element-equipped shafts 3 installed in parallel. On each shaft elevations and depressions are formed along the axial direction and the elevations and depressions on respective shafts intermesh. Organopolysiloxane gum, emulsifying agent, and water are continuously supplied as starting materials to this compounding extruder, and an organopolysiloxane-in-water emulsion is produced by mixing and homogenizing the starting materials by subjecting them through rotation of the mixing element-equipped shafts to a shearing action at a shear rate of at least 10/second (i.e. 10 reciprocal seconds).
    Type: Grant
    Filed: January 12, 1998
    Date of Patent: August 24, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hidehiko Hosokawa, Junichi Maeshima, Fumitaka Suto
  • Patent number: 5935559
    Abstract: An emulsion comprising an oily phase dispersed in an aqueous phase with the aid of a silicone emulsifying agent, the oily phase comprising at least 50% by weight of silicone oil and the aqueous phase containing at least one polyol in a quantity which imparts a water activity value to the emulsion of .ltoreq.0.85.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: August 10, 1999
    Assignee: L'Oreal
    Inventors: Isabelle Afriat, Didier Gagnebien, Isabelle Pecile
  • Patent number: 5935505
    Abstract: Modified polymer compositions having good flowabilty, impact performance and modulus made from at least one polyolefin (e.g., high density polyethylene or polypropylene) blended with minor amounts of either at least one homogeneous linear ethylene/C.sub.5 -C.sub.20 .alpha.-olefin or at least one substantially linear ethylene/C.sub.3 -C.sub.20 .alpha.-olefin polymer are disclosed. The compositions are suitable for thermoformed or molded thinwall applications such as drinking cups, lids, and food containers where the flow length to wall thickness ratios are greater than about 180:1. A process of making thin wall articles is also disclosed.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: August 10, 1999
    Assignee: The Dow Chemical Company
    Inventors: Alan R. Whetten, Stephanie C. Cirihal, Stephen M. Hoenig, Ronald P. Markovich