Patents Assigned to Wacker-Chemie GmbH
  • Publication number: 20040171859
    Abstract: A process for stabilizing organosilicon compounds bearing unsaturated groups during their preparation, distillation, and/or storage, the organosilicon compounds bearing unsaturated groups having been obtained by reacting a haloalkylsilane with a salt of an unsaturated organic acid, by adding one or more compounds of the formula I 1
    Type: Application
    Filed: February 4, 2004
    Publication date: September 2, 2004
    Applicant: Wacker-Chemie GmbH
    Inventor: Juergen Pfeiffer
  • Publication number: 20040170845
    Abstract: Antimisting additives are used in crosslinkable silicone coating compositions for reducing aerosol formation, the antimisting additives being alkenyl-functional siloxane copolymers prepared by reacting a hydrocarbon containing at least three aliphatic double bonds, and with an organosiloxane (2) having terminal Si-bonded hydrogen atoms in the presence of a hydrosilylation catalyst (3) at a ratio of Si-bonded hydrogen to aliphatic double bonds of from 1.3 to 10, and subsequently reacting the resulting SiH-containing hydrocarbon-siloxane copolymer with an &agr;,&ohgr;-dialkenylsiloxane polymer (4) in the presence of a hydrosilylation catalyst (3) at a ratio of aliphatic double bonds to Si-bonded hydrogen of from 1.2 to 10, and optionally, in another step, equilibrating the resulting alkenyl-functional siloxane copolymers with an organopolysiloxane (5).
    Type: Application
    Filed: March 11, 2004
    Publication date: September 2, 2004
    Applicant: Wacker-Chemie GmbH
    Inventors: Christian Herzig, Hans Lautenschlager, Martina Bloechl
  • Patent number: 6783442
    Abstract: The invention relates to a saw wire consisting essentially of a steel wire, an intermediate layer and a metallic binding phase into which diamond grains with an average diameter of 10 to 50 micrometers are inserted, characterized in that the metallic binding phase has a hardness of between 600 and 1100 HV 0.1 and consists of an inner layer and an outer layer which are arranged concentrically around the steel wire provided with the intermediate layer. The inner layer has a thickness of approximately between 10 and 25% of the average diamond grain diameter, while the thickness of the outer layer is such that the overall thickness of the metallic binding phase is 45-55% of the average diamond grain diameter and the diamond grains have an average interval of not more than 5 times their average diameter. Other fine particles with an average diameter of 1 to 6 micrometers are located between the diamond grains with an average diameter of 10 to 50 micrometers.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: August 31, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Jörg Lukschandel, Jürgen Meyer
  • Publication number: 20040161526
    Abstract: The glycemic index of food is reduced by incorporating alpha-cyclodextrin in such food or by consuming alpha-cyclodextrin singly or in combination with other materials together with such food.
    Type: Application
    Filed: February 11, 2004
    Publication date: August 19, 2004
    Applicant: Wacker-Chemie GmbH
    Inventors: Gerhard Schmid, Helmut Reuscher, Gerard Antlsperger
  • Patent number: 6777076
    Abstract: Shaped body based on polycrystalline SiC and having a density of greater than 90% of its theoretical density and an adherent graphite layer on its surface, wherein the graphite layer is crystalline, has a thickness of 0.1-100 &mgr;m and has been produced by thermal surface decomposition of the SiC after it has been sintered to closed porosity.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: August 17, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Hubert Thaler, Karl Schwetz, Armin Kayser
  • Patent number: 6773618
    Abstract: A thermal insulation molding having a density of 150-500 kg/m3, includes a thermal insulation material, containing 5%-75% by weight of pyrogenic silica (HDK), 5%-50% by weight of electric-arc silica, 5%-50% by weight of opacifier, wherein the electric-arc silica has a bulk density of <200 kg/m3, a carbon content of <0.1% by weight, an alkali metal oxide content of <0.2% by weight, an alkaline-earth metal oxide content of <0.3% by weight, an SO3 content of <0.05% by weight and a specific surface area of >30 m2/g.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: August 10, 2004
    Assignee: Wacker Chemie GmbH
    Inventors: Thomas Eyhorn, Andreas Rell
  • Patent number: 6770700
    Abstract: Crosslinkable compositions based on organosilicon compounds and moldings produced therefrom further contain glass flakes having a thickness of from 0.1 to 20 &mgr;m, a length of from 1 to 5000 &mgr;m and a width of from 1 to 5000 &mgr;m, and a width or length to thickness ratio in the range from 10:1 to 2000:1. The compositions, when cured, exhibit excellent tear resistance, have surfaces exhibiting a low coefficient of friction, and a relatively low calorific value.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: August 3, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Johann Mueller, Gerhard Madl
  • Patent number: 6764717
    Abstract: Antimisting additives are used in crosslinkable silicone coating compositions for reducing aerosol formation, the antimisting additives being alkenyl-functional siloxane copolymers prepared by reacting a hydrocarbon containing at least three aliphatic double bonds, and with an organosiloxane (2) having terminal Si-bonded hydrogen atoms in the presence of a hydrosilylation catalyst (3) at a ratio of Si-bonded hydrogen to aliphatic double bonds of from 1.3 to 10, and subsequently reacting the resulting SiH-containing hydrocarbon-siloxane copolymer with an &agr;,&ohgr;-dialkenylsiloxane polymer (4) in the presence of a hydrosilylation catalyst (3) at a ratio of aliphatic double bonds to Si-bonded hydrogen of from 1.2 to 10, and optionally, in another step, equilibrating the resulting alkenyl-functional siloxane copolymers with an organopolysiloxane (5).
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: July 20, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Christian Herzig, Hans Lautenschlager, Martina Bloechl
  • Publication number: 20040131527
    Abstract: Partly hydrophobic metal oxides are prepared by silylating a metal oxide with
    Type: Application
    Filed: December 17, 2003
    Publication date: July 8, 2004
    Applicant: Wacker-Chemie GmbH
    Inventors: Torsten Gottschalk-Gaudig, Herbert Barthel, Bernard Paul Binks, Henri Balard
  • Patent number: 6759094
    Abstract: Branched organosiloxane (co)polymers comprising the structural elements of the formula Y[—CnH2n—(R2SiO)m—Ap—R2Si—G]x  (I) where Y is a tri- to decavalent, optionally heteroatom-containing hydrocarbon radical, R is a monovalent, optionally halogenated hydrocarbon radical, A is a radical of the formula —R2Si—R2—(R2SiO)m—, in which R2 is a divalent hydrocarbon radical, G is a monovalent radical of the formula —CfH2f−2—Z or a divalent radical of the formula —CnH2n— bonded to a further radical Y, Z is a monovalent hydrocarbon radical which is free from terminal aliphatic carbon-carbon multiple bonds, and is inert toward SiH groups in hydrosilylation reactions, x is an integer from 3 to 10, f is an integer from 2 to 12, k is 0 or 1, n is an integer from 2 to 12, m is an integer which is at least 1, and p is 0 or a positive integer, with the proviso that the branched organosiloxane (co)polymers contain on
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: July 6, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Christian Herzig, Reinhard Stallbauer, Christine Weizhofer
  • Patent number: 6756454
    Abstract: The invention relates to a method for reducing odor emissions of aqueous aromatic vinyl-1,3-diene-copolymer dispersions which have been stabilized with a protective colloid. The invention also relates to redispersion powders obtained by drying said dispersions. This is achieved by emulsion polymerization of a mixture containing at least one aromatic vinyl and at least one 1,3-diene in the presence of one or more protective colloids and by optionally drying the polymer dispersion obtained thereby. The invention is characterized in that 0.01 to 15.0 wt. % of one or more monomers selected from the group of branched or unbranched alkyl esters containing 1 to 8 carbon atoms in the alkyl radical of monounsaturated mono- or dicarboxylic acids are added at the end of the polymerization when the total content of the aqueous polymer dispersion containing free monomers ranges from >0 to ≦20 wt. %, whereby the given wt. % refers to the polymer content of the dispersion.
    Type: Grant
    Filed: May 17, 2001
    Date of Patent: June 29, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Theo Mayer, Peter Ball
  • Publication number: 20040118158
    Abstract: A process for producing an SiO2 shaped body which is at least partially vitrified, wherein an amorphous, porous SiO2 green body is sintered or vitrified by contactless heating by means of radiation, while avoiding contamination to the SiO2 shaped body with foreign atoms, wherein the radiation used is the beam of a laser at a subatmospheric pressure below 1000 mbar.
    Type: Application
    Filed: December 10, 2003
    Publication date: June 24, 2004
    Applicant: Wacker-Chemie GmbH
    Inventors: Fritz Schwertfeger, Axel Frauenknecht, Jens Guenster, Sven Engler, Juergen Heinrich
  • Publication number: 20040122199
    Abstract: Organopolysiloxane compositions obtainable by reaction of (a) essentially linear organopolysiloxanes which are terminated at both ends by Si-bonded hydroxy groups, (b) optionally, plasticizers, (c) at least one dialkylaminomethylalkyldialkoxysilane chain extender and/or partial hydrolysate thereof, (d) at least one deactivator, (e) optionally, one or more alkyltrialkoxysilanes and/or partial hydrolysates thereof, and (f) optionally, catalysts for accelerating the reaction of silane (e) with Si—OH groups, are useful in low-modulus compositions which can be crosslinked at room temperature, in particular, compositions which crosslink with elimination of alcohols.
    Type: Application
    Filed: December 5, 2003
    Publication date: June 24, 2004
    Applicant: Wacker-Chemie GmbH
    Inventors: Uwe Scheim, Wolfgang Ziche
  • Publication number: 20040116566
    Abstract: Organosilicon compounds having alkynol groups and containing units of the formula 1
    Type: Application
    Filed: November 20, 2003
    Publication date: June 17, 2004
    Applicant: Wacker-Chemie GmbH
    Inventor: Armin Fehn
  • Patent number: 6745963
    Abstract: Process is for environmentally friendly, low-waste reprocessing of side dams for the continuous casting of thin steel strip having a mechanically or chemically worn surface. The mechanically or chemically worn surface of the side dams is cleaned by methods known per se and the side dams are subsequently converted into a BN-containing powder by crushing and milling.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: June 8, 2004
    Assignee: Wacker Chemie GmbH
    Inventors: Thomas Jüngling, Ulrich Bencker, Herbert Kiechle, Siegfried Lerf, Stefan Müller
  • Patent number: 6746555
    Abstract: The invention provides low-emission adhesives based on an aqueous, protective-colloid-free polymer dispersion or water-redispersible dispersion powders, obtainable therefrom, of vinyl acetate-ethylene copolymers, obtainable by free-radically initiated emulsion polymerization, in aqueous medium and in the presence of one or more emulsifiers, of a comonomer mixture comprising a) from 5 to 50% by weight of ethylene, b) from 20 to 80% by weight of at least one vinyl ester from the group of vinyl esters of unbranched or branched carboxylic acids having 1 to 9 carbon atoms whose homopolymers have a glass transition temperature Tg >0° C., c) from 5 to 70% by weight of at least one vinyl ester from the group of vinyl esters of branched carboxylic acids having 8 to 13 carbon atoms whose homopolymers have a glass transition temperature Tg <0° C., d) from 0.
    Type: Grant
    Filed: July 8, 2000
    Date of Patent: June 8, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Holger Künstle, Rudolf Weissgerber
  • Publication number: 20040106749
    Abstract: An antifoam formulations comprise
    Type: Application
    Filed: November 7, 2003
    Publication date: June 3, 2004
    Applicant: Wacker-Chemie GmbH
    Inventors: Willibald Burger, Holger Rautschek, Christian Herzig
  • Patent number: 6743515
    Abstract: The invention relates to self-adhesive addition-crosslinking silicone compositions which comprises (A) diorganopolysiloxanes, (B) organohydrogenpolysiloxanes containing less than 20 SiH bonded hydrogen atoms and less than 12% aryl groups, (C) organosilicon compounds having epoxy groups and hydrolyzable groups and (D) a hydrosilylation catalyst. The compositions are transparent to translucent, exhibit good compositional comparability, and cure to form strongly adhesive elastomers with good physical properties.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: June 1, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Philipp Müller, Frank Achenbach, Georg Eberl
  • Publication number: 20040096413
    Abstract: Cosmetic or dermatological preparations are based upon vitamin F, and the vitamin F is present in the form of a complex with a cyclodextrin which includes alpha-cylodextrin, beta-cyclodextrin, and gamma-cyclodextrin.
    Type: Application
    Filed: November 12, 2003
    Publication date: May 20, 2004
    Applicant: Wacker-Chemie GmbH
    Inventors: Marlies Regiert, Michaela Kupka
  • Patent number: 6737458
    Abstract: The invention relates to silicone compositions which can be crosslinked to give elastomers and which comprises the constituents (A) from 20 to 99% by weight of polyorganosiloxane containing at least two alkenyl groups per molecule and having a viscosity at 25° C. of from 0.1 to 500,000 Pa.s, (B) from 1 to 80% by weight of non-reinforcing filler having a mean particle size of from 0.1 to 200 &mgr;m and a specific surface area of <100 m2/g, (C) a crosslinking component comprising (C1) an organic peroxide, or (C2) an organosilicon compound containing at least two SiH functions per molecule in combination with a hydrosilylation catalyst, and (D) a nitrogen compound which is selected from amino, ammonium and amido compounds and nitrogen-containing organosilicon compounds. The compositions exhibit improved thermal stability and resistance to oil at elevated temperatures.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: May 18, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Christof Woerner, Richard Birneder