Patents Assigned to Wacker-Chemie GmbH
  • Vinyl aromatic-1,3-diene copolymers stabilized with protection colloids used for modifying materials containing plaster or calcium carbonate
    Patent number: 6566434
    Abstract: The vinyl aromatic-1,3-diene copolymers stabilized with protection colloids are used in the form of aqueous polymer dispersions or water-redispersible polymer powders for modifying materials that contain plaster or calcium carbonate. The polymer dispersions or polymer powders are obtained by the emulsion-polymerization of a mixture containing at least one vinyl aromatic and at least one 1,3-diene in the presence of at least one protection colloid and without any emulsifier, and by optionally drying the aqueous polymer dispersions thus obtained.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: May 20, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Theo Mayer, Peter Fritze, Reinold Härzschel, Hans-Peter Weitzel
  • Process for the chlorination of methylsilanes
    Publication number: 20030088117
    Abstract: The invention relates to a process for the chlorination of methylsilanes, which comprises reacting methylsilanes with chlorine in the presence of at least 0.1% by weight of hydrogen chloride, based on the weight of methylsilane of the formula (II), under the action of electromagnetic radiation which induces chlorination, chlorine being used in a substoichiometric amount based on the methylsilane of the formula (II), and the reaction being carried out at temperatures below the boiling point of the methylsilane of the formula (II). The invention further relates to an apparatus suitable for carrying out the chlorination of an industrial scale.
    Type: Application
    Filed: October 18, 2002
    Publication date: May 8, 2003
    Applicant: Wacker-Chemie GmbH
    Inventors: Helmut Hollfelder, Siegfried Pflaum, Franz Riener
  • Compositions containing addition polymers prepared using crosslinkable protective colloids
    Patent number: 6559259
    Abstract: A water-soluble, crosslinkable protective colloid is provided having a molecular weight of least than 500,000 comprising: a) 20 to 959 by weight of monomer units containing sulphonic acid or sulphonate groups, b) 4 to 800 by weight of monomer units containing N-methylol or N-alkoxymethyl groups, and c) 0.1 to 20% by weight of hydrophobic monomer units such as water insoluble ethylenically unsaturated compounds and the hydrophobic end groups of initiator radicals or regulator molecules. Optionally, up to 50% by weight of the monomer units containing sulphonic acid or sulphonate groups can be replaced by monomer units containing carboxyl groups or monomer units containing amide groups.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: May 6, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Klaus Kohlhammer, Gerhard Koegler, Monika Rockinger, Walter Dobler
  • Organopolysiloxane resins
    Patent number: 6552151
    Abstract: The invention relates to organopolysiloxane resins which have a glass transition temperature of more than 60° C. and OH contents of from 1 percent to 8 percent by weight.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: April 22, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Thomas Köhler, Walter Blüml
  • Use of Vinylaromatic/1,3-diene copolymers stabilized with protective colloids in building adhesive formulations
    Patent number: 6552120
    Abstract: The invention relates to the utilization of aqueous polymer dispersions or of polymer powders which can be redispersed in water and which are based on protective colloid-stabilized aromatic vinyl-1,3-diene-copolymers in adhesive formulations used in the building industry, whereby the polymer dispersion and the polymer powders are produced 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, without using an emulsifier, and by optionally drying of the aqueous polymer dispersion obtained thereby.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: April 22, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Reinhard Härzschel, Theo Mayer, Hans-Peter Weitzel
  • Process for treating organic fibers
    Patent number: 6547981
    Abstract: Organic fibers are treated with aqueous preparations comprising amino-functional organosilicon compounds of the general formula H2N—R1—SiR2O(SiR2O)iSiR2—R1—NH2 where i is an integer from 1 to 1000, R is an identical or different monovalent hydrocarbon radical having 1 to 18 carbon atoms per radical, and R1 is a divalent hydrocarbon radical having 2 to 10 carbon atoms. The treated organic fibers, particularly in the form of textiles, exhibit a soft hand and good rewettability.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: April 15, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Michael Messner, Wolfgang Schattenmann, Renate Minigshofer, Evelyn Richter
  • Device for simultaneously separating a multiplicity of wafers from a workpiece
    Patent number: 6543434
    Abstract: A device for simultaneously separating a multiplicity of wafers from a hard brittle workpiece having a longitudinal axis, with a wire web made from saw wire and with an advancing device which brings about a translational relative movement, which is perpendicular to the longitudinal axis of the workpiece, between the workpiece and the wire web of the wire saw, in the course of which movement the workpiece is passed through the wire web, wherein the wire web is formed from a multiplicity of individual wires, and wherein there is a device for holding and rotating the workpiece about the longitudinal axis.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: April 8, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Bernhard Holzmuller, Ulrich Wiese, Jochen Greim
  • Flame retardant aromatic polycarbonate resin composition
    Patent number: 6541548
    Abstract: There is provided an aromatic polycarbonate resin composition which exhibits high flame retardancy without sacrificing melt-molding stability or melt fluidity when molding the resin composition. The flame retardant aromatic polycarbonate resin composition comprises a resin component (a) comprising an aromatic polycarbonate and optionally a styrene polymer, the resin composition having an aromatic polycarbonate content of 20% by weight or more; and 0.1 to 50 parts by weight of an organopolysiloxane (b) comprising a linear organopolysiloxane (b)i and a cyclic organopolysiloxane (b)ii, component (b)ii present in an amount of from 5 to 95% by weight based on the total weight of components (b)i and (b)ii.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: April 1, 2003
    Assignees: Wacker-Chemie GmbH, Asahi Kasei Kabushiki Kaisha
    Inventors: Richard Weidner, Hiroji Oda
  • Process for preparing silanes
    Patent number: 6541650
    Abstract: A process for preparing silanes of the formula 1: RaSiHbCl4-a-b  (1) where R is methyl or ethyl, a is 0, 1, 2 or 3 and b is 0 or 1, from hydrogen chloride gas and reactants selected from among a) silicon metal, b) disilanes and oligosilanes whose radicals are selected from among H, R and Cl,  and mixtures thereof, wherein the hydrogen chloride gas is prepared from H2 and Cl2 in a concerted process.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: April 1, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Willi Streckel, Wilfried Kalchauer, Herbert Straussberger
  • Silicone rubber composition for producing cables or profiles with retention of function in the event of fire
    Publication number: 20030055157
    Abstract: A composition comprising peroxidically crosslinking condensation-crosslinking, or addition-crosslinking silicone rubber; metal compounds selected from metal oxides such as magnesium oxide, aluminum oxide, tin oxide, calcium oxide and barium oxide and precursors thereof which produce oxides on heating, boric acid, and zinc borate; platinum complexes having at least one unsaturated group; and hollow beads. The compositions form a coherent ceramic insulation upon heating which still enables the conductors to carry high voltage electrical signals.
    Type: Application
    Filed: September 10, 2002
    Publication date: March 20, 2003
    Applicant: WACKER-CHEMIE GmbH
    Inventors: Dietrich Wolfer, Wilhelm Marsch, Werner Brennenstuhl
  • Crosslinkable polymer composition
    Patent number: 6534177
    Abstract: Crosslinkable polymer compositions are provided which can be in the form of a polymer powder which is redispersible in water or as an aqueous dispersion. The polymer composition is composed of A) a copolymer of one or more comonomers of vinyl esters of straight-chain or branched alkanecarboxylic acids having 1 to 18 C atoms, acrylates or methacrylates of branched or straight-chain alcohols having 1 to 15 C atoms, dienes, olefins, vinylaromatics and vinyl halides, and of from 0.1 to 10% by weight, based on the total weight of the comonomers, of one or more ethylenically unsaturated comonomers containing epoxide groups, and B) one or more non-copolymerizable compounds having at least two epoxide groups. The invention furthermore relates to a process for the preparation of the crosslinkable polymer compositions and their use in chemical products for the construction industry.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: March 18, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Klaus Kohlhammer, Klaus Adler, Herbert Eck, Hermann Lutz
  • Liquid-phase-sintered SiC shaped bodies with improved fracture toughness and a high electric resistance
    Patent number: 6531423
    Abstract: The invention relates to a polycrystalline SiC shaped body, which consists of 96% by weight to 99.5% by weight of hard-material grains having a core/shell structure, 0 to 0.1% by weight free carbon, remainder a partially crystalline binder phase; having the following properties: density at least 99.5% of the theoretical density, dark green coloring of ground sections or polished surfaces through characteristic light absorption in the orange spectral region at 1.8 to 2.2 eV, resistivity of at least 107 ohm·cm, and fracture toughness of at least 4.0 MPa.m½, measured using the bridge method.
    Type: Grant
    Filed: July 8, 2000
    Date of Patent: March 11, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Karl-Alexander Schwetz, Lorenz Sigl, Thomas Kempf, Georg Victor
  • Organopolysiloxane materials which can be cross-linked by cleaving alcohols into elastomers
    Patent number: 6531621
    Abstract: The invention relates to a method for producing organopolysiloxane terminated with alkoxy groups, wherein A) organopolysiloxane terminated with HO is reacted with B) alkoxysilane having at least three alkoxy groups and/or whose partial hydrolysate is made to react in the presence of C) acid phosphoric acid ester of general formula (I): (HO)aOP(—O—[(CR12)b—O]c[(CR22)d]e—L—M)(3−a), wherein a=1 or 2; R1 and R2=a hydrogen, methyl or hydroxyl radical; b and d=2 or 3; c=integral values from 2 to 15; e=0 or 1; L=a radical from the group —O—, —COO—, —OOC—, —CONR3—, —NR4CO— and —CO—; R3 and R4=a hydrogen or a C1-C10-alkyl radical and M=a monovalent, optionally a hydroxyl, fluorine, chlorine, bromine, C1-C10-alkoxylalkyl or cyano group substituted C1- to C20-hydrocarbon radical, provided that the radicals R1 and R2 can only be at one give
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: March 11, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Norman Dorsch, Rudolf Heinrich, Oswin Sommer, Stefan Oberneder, Wolfgang Hechtl
  • Fast-drying rendering and coating composition
    Patent number: 6531538
    Abstract: The invention relates to a fast-drying rendering and coating composition comprising a binder in the form of an aqueous polymer dispersion or of a water-redispersible polymer powder, and also an organic precipitant, if desired in combination with an inorganic precipitant.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: March 11, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Hans-Peter Weitzel, Harald Zeh, Peter Ball, Klaus Marquardt
  • Organopolysiloxanes having quaternary ammonium groups and processes for the preparation thereof
    Publication number: 20030045666
    Abstract: Organopolysiloxanes bearing quaternary ammonium groups and containing units of the general formula
    Type: Application
    Filed: July 25, 2002
    Publication date: March 6, 2003
    Applicant: Wacker-Chemie GmbH
    Inventors: Wolfgang Schattenmann, Michael Mebner, Renate Minigshofer, Evelyn Richter
  • Chemical digestion process using organosiloxane compounds
    Patent number: 6521084
    Abstract: In a process for extracting cellulose from fibrous materials such as wood, the fibrous materials are reacted with a chemical disintegration solution in the presence of organosilicic compounds.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: February 18, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Willibald Burger, Outi Neubig, Kimmo Lappalainen, Hannu Wahlberg
  • Crosslinking agents
    Patent number: 6518371
    Abstract: A polyorganosiloxane containing the units (HR2Si—O1/2) HM units, (Si—O4/2) Q units, (R1Si—O3/2) T units and (R2Si—O2/2) D units in a ratio of from 2:1:0:0 to 6:4:2:2, or (HR2Si—O1/2) HM units, (R1Si—O3/2) T units, (R2Si—O2/2) D units and (R2(R1O)Si—O1/2) in a ratio HM:T:D:alkoxyM of from 1:2:0:0 to 3:4:2:2 is described, where R are identical or different, non-halogenated or halogenated hydrocarbon radicals having from 1 to 18 carbon atoms per radical, or are OR1, where R1 is a monovalent, unsubstituted or substituted hydrocarbon radical having from 1 to 8 carbon atoms, and in each molecule there are at least 3 Si-bonded hydrogen atoms. The polyorganosiloxanes are particularly useful as crosslinking agents in addition curable elastomer formulations.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: February 11, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Peter Fink, Peter Jerschow, Hedwig Schreiter, Richard Birneder, Alois Riedl
  • Fiber binding powder composition for consolidating fiber materials
    Patent number: 6511561
    Abstract: Disclosed is a fiber binding powder composition for consolidating fiber materials, comprising a) a polymer powder based on a polyvinyl alcohol stabilized polymer of one or more monomers selected from the group consisting of the vinyl esters of branched or unbranched carboxylic acids having 1 to 12 carbon atoms, the esters of acrylic acid and methacrylic acid with branched or unbranched alcohols having 1 to 12 carbon atoms, aromatic vinyl compounds, vinyl halides, olefins and dienes, and b) an inorganic compound which is solid at room temperature and which enters a chemical bond with the OH groups of the polyvinyl alcohol on introduction of said powder into water.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: January 28, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Klaus Kohlhammer, Gerhard Koegler, Susanne Seidl, Sabine Gruber, Herbert Proebstl
  • Composition for coating shaped articles or elastomeric materials
    Patent number: 6512059
    Abstract: The invention relates to a composition, to a process for its preparation and to a method of coating shaped articles or elastomeric materials, where the composition can be prepared using (1) polymer components selected from the group consisting of (A1) polyorganosiloxanes comprising units (T units) of the formula (R1Si—O3/2) and optionally, units (M units) of the formula (R3Si—O1/2) (A2) polyorganosiloxanes comprising units (Q units) of the formula (Si—O4/2) and, optionally, units (M units) of the formula (R3Si—O1/2)  in which R is identical or different and represents unhalogenated or halogenated hydrocarbon radicals having 1 to 18 carbon atom(s) per radical or OR1, where R1 is identical or different and represents hydrogen or a monovalent, unsubstituted or substituted hydrocarbon radical having 1 to 8 carbon atom(s),  with the proviso that there are from 0.01% to 3.0% by weight, preferably from 0.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: January 28, 2003
    Assignee: Wacker-Chemie GmbH
    Inventor: Johann Mueller
  • Release agents for bituminous substances
    Patent number: 6506444
    Abstract: The invention relates to a composition which comprises at least one polyorganosiloxane in aqueous solution or dispersion, in the absence of additional dispersants.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: January 14, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Günter Mahr, Tadahiro Okabe, Kengo Ito