Patents Examined by Melvyn I. Marquis
  • Patent number: 6005036
    Abstract: A composition containing an organic material subject to oxidative, thermal or actinic degradation can be stabilized by an effective amount of at least one polysilane compound of formula I ##STR1## Preferred compounds are where q is zero, p is 2 to 50, m is zero, R.sub.1 is alkyl, phenyl or benzyl, and A and B are independently hydrogen or a group --Si(E).sub.3 where E is alkyl. These compounds can also be copolymeric having a random, alternate or block distribution of individual structural units. These compounds are particularly suitable as process stabilizers.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: December 21, 1999
    Assignee: Ciba Specialty Chemical Corporation
    Inventors: Primo Carrozza, Valerio Borzatta, Chryssostomos Chatgilialoglu
  • Patent number: 6001918
    Abstract: A silicone gel composition comprising: (A) 100 parts by weight of an organopolysiloxane containing at least two alkenyl groups per molecule and having a viscosity of 0.01 to 100 Pa.s at 25.degree. C.; (B) an organopolysiloxane containing at least two silicon-bonded hydrogen atoms per molecule and having a viscosity of 0.001 to 10 Pa.s at 25.degree. C. in an amount sufficient to provide from 0.2 to 5 moles of silicon-bonded hydrogen atoms per one mole of alkenyl groups in component (A); (C) 0.01 to 15 parts by weight of a silica powder having a specific surface area of at least 50 m.sup.2 /g; (D) 0.0001 to 1.0 part by weight of a diamine compound represented by the following general formula: R.sup.1.sub.2 N--R.sup.2 --NR.sup.1.sub.2 wherein each R.sup.1 is independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R.sup.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: December 14, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hiroji Enami, Akihiro Nakamura, Yuji Hamada, Takeaki Saiki
  • Patent number: 6001945
    Abstract: An exchange reaction of hydroxyl and alkoxysilane is used as a polymerization avenue yielding hyperbranched polymers. A monomer containing hydroxy alcohol functionality and alkoxy functionality attached to a silicon atom in the monomer is employed, and a simple exchange reaction with driving off of alcohol by-product leads to the desired hyperbranched polymerization and materials.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: December 14, 1999
    Assignee: Dow Corning Corporation
    Inventors: Gary Thomas Decker, Daniel Graiver, Arthur James Tselepis
  • Patent number: 6001943
    Abstract: The present invention provides a silicone gel composition for use in sealing and filling of electrical and electronic parts, which are characterized by the fact that when said composition is cured, said composition forms a silicone gel in which the loss elastic modulus at a temperature of 25.degree. C. and a shear frequency of 0.1 Hz is 1.0.times.10.sup.2 to 1.0.times.10.sup.4 Pa, and in which the complex elastic modulus is 1.0.times.10.sup.5 Pa or less, and a silicone gel which is characterized by the fact that in a silicone gel which seals or fills electrical or electronic parts, the loss elastic modulus of this silicone gel at a temperature of 25.degree. C. and a shear frequency of 0.1 Hz is 1.0.times.10.sup.2 to 1.0.times.10.sup.4 Pa, and the complex elastic modulus is 1.0.times.10.sup.5 Pa or less.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: December 14, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hiroji Enami, Yuji Hamada, Akihiro Nakamura, Takeaki Saiki
  • Patent number: 6001914
    Abstract: A crosslinkable silicone compound including: a crosslinkable silicone polymer, constituted by polyorganosiloxane; a crosslinking agent, constituted by polyhydrogen organosiloxane; a platinum catalyst; and a synthetic sodium-aluminum zeolite. The compound is completed by inhibitors and/or fillers and/or release agents and/or colors and/or plasticizers and/or additives to modify its rheological characteristics.
    Type: Grant
    Filed: July 28, 1997
    Date of Patent: December 14, 1999
    Assignee: Zhermack S.p.A.
    Inventors: Enrico Faccio, Francesco Callegaro
  • Patent number: 5998536
    Abstract: The aqueous polyorganosiloxane emulsion, in particular for the coating of textiles or similar materials, which comprises an organopolysiloxane formula which is a precursor of the elastomer comprising a polydiorganosiloxane, preferably an inorganic filler, a catalyst and optionally a crosslinking agent, in the absence of surfactant in this formula, is characterized in that the organopolysiloxane formula is in emulsion in an aqueous protective hydrocolloid solution and in that this emulsion is obtained by direct emulsification of the complete organopolysiloxane formula in the aqueous protective hydrocolloid solution. The protective hydrocolloid is preferably a poly(vinyl alcohol) (PVA) or a PVA mixture.Preparation method relating thereto, coating process using these emulsions and products thus coated.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: December 7, 1999
    Assignee: Rhone-Poulenc Chimie
    Inventors: Jean Louis Bertry, Marc Ladreyt, Alain Pouchelon, Chris Street
  • Patent number: 5998515
    Abstract: The compression set of elastomeric silicone compositions, addition cured injection moldable compositions or millable compositions, is reduced by the incorporation of nitrogen compounds wherein the nitrogen possesses at least one organic substituent and the nitrogen is tetravalent wherein the nitrogen is cationic. The adhesion of such compositions to thermoset or thermoplastic polymer substrates is improved by the addition of bis(trimethoxysilylpropyl)fumarate and a disilanol that may or may not contain alkenyl groups.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: December 7, 1999
    Assignee: General Electric Company
    Inventors: Frank S. Burkus, II, Edward M. Jeram, Slawomir Rubinsztajn
  • Patent number: 5998563
    Abstract: Photosensitive orientation material providing unidirectional LC alignment to generate a high pretilt angle for various LC compounds, and superior thermal stability, and being suitable for mass production, especially for active matrix LC displays, including polysiloxane, and a derivative of a cinnamoyl group.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: December 7, 1999
    Assignee: LG Electronics Inc.
    Inventors: Grit Pirwitz, Horst Zaschke, Andrea Hohmuth, Yuriy Reznikov, Oleg Yaroshchuk, Igor Cerus
  • Patent number: 5998559
    Abstract: A single-ion electrolyte achieves conductivity greater than 10.sup.-3 S/cm at 20.degree. C. by employing repeating mer units which are functionalized by fluoroalkylsulfonate groups. Preferred backbones for the electrolyte include polysiloxanes, polymethacrylates and poly(alkylene oxides). More preferred backbones have the structure ##STR1## wherein A is selected from the group consisting of C and Si such that when A is C then R.sup.4 is (CH.sub.2).sub.1-100' and when A is Si then R.sup.4 is O; R.sup.1 and R.sup.2 are independently selected from the group consisting of hydrogen, lower alkyl, lower alkoxy, fluorinated lower alkyl, fluorinated lower alkoxy, and fluoroalkylsulfonate; and R.sup.3 is null or selected from the group consisting of O, (O).sub.1-100, O--CH.sub.2, (O).sub.1-100 --(CH.sub.2).sub.1-100.
    Type: Grant
    Filed: August 15, 1996
    Date of Patent: December 7, 1999
    Assignee: SRI International
    Inventors: Subhash C. Narang, Susanna C. Ventura
  • Patent number: 5998541
    Abstract: Finishing agents comprise the combination of an alkoxysilane surface active agent, a silanol condensing catalyst, and a nonaqueous liquid or solid medium, or the combination of an alkoxysilane surface active agent, an acid catalyst and a liquid or solid medium. In the latter embodiment, it is preferred that at least one of the alkoxysilane surface active agent and the acid catalyst be microencapsuled. The finishing agent permits formation of chemically adsorbed protecting films. Such protecting films are used for substrates of such equipments as electronics products, electric domestic products, automobiles, industrial equipments, mirrors, lenses for glasses and the like. The protecting films have a durability and heat, weather and abrasion resistance, and also water and oil repellent properties.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: December 7, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Kazufumi Ogawa
  • Patent number: 5998560
    Abstract: A coating powder for providing a high temperature resistance coating has a silicone resin binder system which is either substantially all silicone resin or an --OH-- functional silicone resin adduct plus blocked, multi --NCO functional curative. The coating powder is pigmented with titanium dioxide which is either non-coated or coated with a sufficiently low level of an inorganic oxide such that when slurried in water, the pH is 7 or above. The coating powder preferably contains at least 40 phr mica and/or calcium metasilicate, preferably between 2 and about 20 phr aluminum. The coating powder may also contain zinc to protect the underlying substrate from corrosion and high-temperature pigments, particularly ceramic pigments.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: December 7, 1999
    Assignee: Morton International, Inc.
    Inventors: Owen H. Decker, Charles P. Tarnoski
  • Patent number: 5994482
    Abstract: The present invention relates to polypropylene alloys which are especially suited for soft fiber and fabric applications. An embodiment of these alloys comprise an ethylene-propylene random copolymer having an ethylene content of from about 1.0 to 5.0% by weight, in an amount of from about 40 to 90% by weight of the alloy; and an ethylene-propylene bipolymer having an ethylene content of from about 10 to 30% by weight, in an amount of from about 10 to 60% by weight of the alloy. The present invention further relates to a hybrid process for making these alloys.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: November 30, 1999
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: George Byron Georgellis, Chia Yung Cheng, William Moa-Tseng Chien
  • Patent number: 5993910
    Abstract: A material system and method for imparting non-stick and non-wetting properties to an inorganic article having hydroxyl groups on its surface, the system comprising a silane having the formula R.sub.n SiX.sub.4-n, wherein n is 1-2 and X is a hydrolyzable group, a colloidal metal oxide sol, and an acidified aqueous mixture with a lower alkanol.
    Type: Grant
    Filed: March 4, 1998
    Date of Patent: November 30, 1999
    Assignee: Corning Incorporated
    Inventors: Alain Carre, Michel Prassas, Jean Waku-Nsimba
  • Patent number: 5994456
    Abstract: A composition comprising (A) at least one mercapto-functional organosilicon compound having an average of a least two mercapto groups per molecule and (B) a cure initiator. The mercapto-functional organosilicon compound may include mercapto-functional organosilanes, mercapto-functional organosiloxanes, and mercapto-functional copolymers. The compositions of the present invention polymerize or cure to form compositions comprising reaction products of components (A) and (B). The cure initiator is a metal salt that produces a uniform cure throughout the composition, regardless of the amount of oxygen present. The cured products range in properties from soft gels to though elastomers to hard resins and are useful as molded articles, electrical encapsulants, and sealants.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: November 30, 1999
    Assignee: Dow Corning Corporation
    Inventors: Jerome Melvin Klosowski, Sarah Severson Snow
  • Patent number: 5994489
    Abstract: A method of hydrolyzing an alkoxysilane which comprises adding sufficient water to hydrolyze at least one alkoxy group, optionally, in the presence of acidic or basic catalysts.
    Type: Grant
    Filed: October 24, 1994
    Date of Patent: November 30, 1999
    Assignee: The Dow Chemical Company
    Inventors: Robert F. Harris, Paul H. Townsend, III
  • Patent number: 5994490
    Abstract: Compositions obtained by mixing oxygen-containing phosphazenes with tertiary alcohols at a temperature of from 0.degree. C. to 70.degree. C. and a pressure of from 900 to 1100 hPa are useful in processes for equilibrating and/or condensing organosilicon compounds.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: November 30, 1999
    Assignee: Wacker-Chemie GmbH
    Inventors: Bernward Deubzer, Christian Herzig
  • Patent number: 5994436
    Abstract: A ductile, gamma radiation resistant olefin polymer composition, including (a) an olefin in polymer, (b) an amount of N,N-dialkylhydroxylamine which is effective to increase the ductility of the composition, and (c) a polysiloxane which contains sterically hindered piperidino groups and which is present in an amount effective to increase the gamma radiation resistance of the composition. The composition may be used to manufacture sterilizable articles including food packaging and medical articles.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: November 30, 1999
    Assignee: Montell North America Inc.
    Inventor: Teresa A. Pierson
  • Patent number: 5994461
    Abstract: A high voltage electrical insulator formed from a curable liquid silicone rubber composition, and subsequently cured, a composition consisting essentially of(A) 100 weight parts of a fluid mixture of polyorganosiloxane comprising(a) at least 5 weight percent of a polyorganosiloxane resin comprising repeating units selected from the group consisting of SiO.sub.4/2 and RSiO.sub.3/2, where R is a monovalent hydrocarbon group, and(b) polydiorganosiloxane having a viscosity in the range from about 100 mPa.multidot.s to 100,000 mPa.multidot.s, that contains at least 2 silicon-bonded alkenyl groups in each molecule,(B) 1 to 100 weight parts microparticulate silica,(C) polyorganohydrogensiloxane that contains at least 2 silicon-bonded hydrogen atoms in each molecule, in a quantity that provides a value from 0.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: November 30, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Akito Nakamura, Yasumichi Shigehisa, Yuichi Tsuji
  • Patent number: 5994488
    Abstract: Plastic articles for medical use comprising a polymer, which polymer comprising units derived from an ethylenically unsaturated monomer having a chain containing amino and organosiloxane groups, wherein the monomer is represented by the following general formula: ##STR1## (where X is an ethylenically unsaturated polymerizable group; each R.sup.1 is, independently, selected from a hydrogen atom, unsubstituted and substituted alyl groups, unsubstituted and substituted aryl groups and the groups (CH.sub.2).sub.r COOR.sup.3 and (CH.sub.2).sub.r ONR.sup.4 R.sup.5 ; each of m, n and p, independently, is selected from 0 and 1; each of q and r, independently, is any of zero and 1 to 10; and R.sup.2 is a substituent group containing an organosiloxane group, each of R.sup.3, R.sup.4 and R.sup.5, independently, is a group of R.sup.1 or is a group having a heterocyclic group, or R.sup.4 and R.sup.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: November 30, 1999
    Assignee: Toray Industries, Inc.
    Inventors: Mitsuru Yokota, Nobuo Saito
  • Patent number: 5990024
    Abstract: Novel methods for the preparation of polymers useful as precursors to ceramic materials by catalytic activation of Si--H bonds are disclosed. The methods comprise reacting, in the presence of a catalyst effective to activate Si--H bonds, Si--N bonds, or both, and/or a reactive solvent, a polymer in the form of a polysilane, polysilazane, polysiloxane or polycarbosilane with a reactant having the structural formula R--X--H, wherein X is NR' or O, R is H, organic, silyl, siloxyl, silazanyl or carbosilyl and may contain at least one additional X--H group, and R' is H, amino, silyl or silazanyl, to produce a modified polymer containing at least one Si--X bond. Polymers produced by these methods are also disclosed.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: November 23, 1999
    Assignee: SRI International
    Inventors: Yigal Blum, Gregory A. McDermott