Patents Assigned to Wacker-Chemie GmbH
  • Publication number: 20050215669
    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: May 11, 2005
    Publication date: September 29, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Dietrich Wolfer, Wilhelm Marsch, Werner Brennenstuhl
  • Publication number: 20050208311
    Abstract: Branched, alkenyl-functional organopolysiloxanes prepared by reacting an organic compound having at least two aliphatic double bonds with an organopolysiloxane having more than one Si-bonded hydrogen atom, in the presence of a hydrosilylation catalyst, and in a stoichiometric ratio of aliphatic double bonds to Si-bonded hydrogen such that an alkenyl-functional product is obtained, function as highly effective antimisting additives in the high speed coating of substrates with crosslinkable silicone compositions.
    Type: Application
    Filed: February 20, 2003
    Publication date: September 22, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Hans Lautenschlager, Christian Herzig
  • Patent number: 6946030
    Abstract: A silica glass crucible is produced by a) providing a porous amorphous silica glass green body, which is infiltrated with at least one substance that promotes crystallization of a silica glass crucible, b) drying the infiltrated silica glass green body, c) filling the green body with a metal or semimetal, and d) heating the filled green body for a period of from 1 h to 1000 h to a temperature of from 900 to 2000° C. to form at least a portion of silica crystalline phase. The process may be continued by further heating to melt the metal or semimetal and pulling a single crystal from the melt.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: September 20, 2005
    Assignee: Wacker-Chemie GmbH
    Inventors: Fritz Schwertfeger, Holger Szillat, Christoph Frey, Ulrich Lambert, Axel Frauenknecht
  • Patent number: 6939984
    Abstract: The invention provides a continuous process for preparing alkylchlorosilanes from the residues of direct synthesis of alkylchlorosilanes which comprise liquid constituents with a boiling point of at least 70° C. at 1013 hPa and may also contain solids, with hydrogen chloride, by passing the residues at a temperature not above 200° C. and hydrogen chloride at a temperature higher than the latter into a reactor so that the resultant reaction temperature is from 400° C. to 800° C.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: September 6, 2005
    Assignee: Wacker-Chemie GmbH
    Inventor: Herbert Straussberger
  • Patent number: 6936685
    Abstract: The invention relates to a method for isolating polyorganosiloxanes from an aqueous dispersion, wherein the polyorganosiloxanes are separated from water in a dissolved form with the aid of an extraction agent.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: August 30, 2005
    Assignee: Wacker-Chemie GmbH
    Inventors: Jochen Ebenhoch, Thomas Köhler, Hans Wintrich
  • Publication number: 20050161451
    Abstract: A container with a top edge, a bottom edge and a rear side provided with a door, containing an inliner, wherein the inliner comprises at least two layers located one above the other, an inner layer consisting of uncoated, air-permeable fabric and an outer layer being coated so as to be dust-tight and to provide a moisture barrier, these layers being connected to one another by a special seam such that dust-free venting of the receptacle is possible only through this seam, the inliner being fastened in a reversible manner in the container and having at least one filling opening and an emptying opening.
    Type: Application
    Filed: January 21, 2005
    Publication date: July 28, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Helmut Maginot, Heinz Schertel
  • Patent number: 6911495
    Abstract: A process for the continuous preparation of addition-crosslinking silicone rubbers from a base composition containing at least one polyvinyl polysiloxane and at least 10% by weight, based on the liquid silicone rubber, of hydrophobicized filler, by removing the base composition from a container whose volume reduces proportionally with the amount removed, and conveying the composition by way of a pump with a positive pressure difference to two further pumps (4) which convey the base composition onward, so a component A is prepared continuously by admixing at least one metal catalyst with one stream of the base composition, and a component B is prepared continuously and simultaneously by admixing the crosslinker and inhibitor with a second stream of the base composition, where the metal catalyst, crosslinker, and inhibitor are fed by way of a feed unit which meters in each of the substances.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: June 28, 2005
    Assignee: Wacker-Chemie GmbH
    Inventors: Thomas Hierstetter, Johann Schuster, Gerhard Skroch, Helmut Woehrl
  • Publication number: 20050133766
    Abstract: Aqueous dispersions contain at least two chemically different particle types having a diameter on average of less than 100 ?m. The dispersions are resistant to sedimentation and gelling for long periods of time, and can be used for many purposes, such as the polishing of optical surfaces, and in paints and adhesives.
    Type: Application
    Filed: December 14, 2004
    Publication date: June 23, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Herbert Barthel, Johann Doppelberger, Mario Heinemann, Torsten Gottschalk-Gaudig, Stephan Loskot, Ute Voelkel
  • Publication number: 20050137362
    Abstract: The invention provides storage-stable compositions of organosilicon compounds which comprise (A) organosilicon compounds which are selected from silanes (A1) of the formula 1 RxSi(O R1)4?x??(1) and resinous organopolysiloxanes (A2) which contain units of the formula R a ? ( R 1 ? O ) y ? ? ? Si ? ? ? O 4 - ( a + y ) 2 ( 2 ) and bear groups selected from hydroxyl groups bonded to silicon atoms and C1 to C18 hydrocarboxy groups bonded to silicon atoms, where R is a hydrogen atom or monovalent SiC-bonded, optionally substituted C1-18 hydrocarbon radicals, R1 is a hydrogen atom or monovalent SiC-bonded, optionally substituted C1-18 hydrocarbon radicals, x is 0, 1, 2 or 3, a is 0 or 1 and y is 1, 2 or 3, and (B) from 1 to 499 ppm by weight, based on the organosilicon compounds (A), of at least one amino-containing compound.
    Type: Application
    Filed: December 8, 2004
    Publication date: June 23, 2005
    Applicant: Wacker-Chemie GmbH
    Inventor: Hartmut Ackermann
  • Publication number: 20050137328
    Abstract: Addition-crosslinking silicone resin compositions containing selected high functionality addition curable organosilicon compounds can be cured at relatively low temperatures and can produce highly transparent, hard polymers which are suitable for many uses, in particular for the potting or embedding of electrical componts such as LEDs.
    Type: Application
    Filed: December 13, 2004
    Publication date: June 23, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Gerhard Staiger, Wolfgang Schattenmann
  • Publication number: 20050137412
    Abstract: The present invention relates to a process for adding Si-bonded hydrogen to aliphatically unsaturated compounds containing carbon-carbon multiple bonds and ether oxygen atoms in the presence of carbinol groups, wherein the reaction mixture comprises, as a further component, at least one cyclic ether.
    Type: Application
    Filed: December 8, 2004
    Publication date: June 23, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Christian Ochs, Christian Herzig
  • Publication number: 20050137327
    Abstract: Aqueous dispersions containing organopolysiloxane/polyurea copolymers prepared by reacting aminoalkyl-functional organopolysiloxanes with a diisocyanate in water in the presence of a protonating acid, and optionally one or more surfactants and/or protective colloids. The organopolysiloxane/polyurea polymers may be prepared without the presence of ionic groups if desired.
    Type: Application
    Filed: December 8, 2004
    Publication date: June 23, 2005
    Applicant: Wacker-Chemie GmbH
    Inventor: Wolfgang Ziche
  • Publication number: 20050131243
    Abstract: Process for preparing highly viscous organopolysiloxanes by reacting siloxanes (1) composed of units of the general formula A a ? R c ? ( OR 1 ) d ? SiO 4 - ( a + c + d ) 2 ( I ) where A is a nitrogen-containing Si—C-bonded radical, R is a C1-18 hydrocarbon radical R1 is hydrogen or a C1-8 alkyl radical, a and d are 0 or 1, c is 0, 1, 2 or 3, a+c+d is <3 and one A and one R1 where of R1 is hydrogen atom are present, optionally siloxanes (2) R c ? ( OR 1 ) d ? SiO 4 - ( c + d ) 2 ( II ) where c+d is ?3 and one R1 radical is hydrogen is present, with silanes (3) BReSi(OR3)3?e??(III) where B is a radical —CR22—Y, R2 is hydrogen or C1-4 alkyl, Y is halogen, a monosubstituted O and S atom, or a substituted N or P atom, R3 is C1-8 alkyl, and e is 0, 1 or 2.
    Type: Application
    Filed: December 8, 2004
    Publication date: June 16, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Christian Herzig, Siegfried Dormeier
  • Publication number: 20050129603
    Abstract: Use of a flame hydrolysis apparatus for preparing fumed silica particles or a plasma torch apparatus for sintering fumed silica particles to fused silica particles is capable of producing highly pure silica with non-silicon metal impurities less than 500 pb, when at least an inner nozzle is constructed of a silicon-containing material having a low level of non-silicon metal impurities. Preferably, all surfaces in the respective apparatus which contact silica are of similar construction. The silica contains a low level of impurities as produced, without requiring further purification.
    Type: Application
    Filed: September 17, 2004
    Publication date: June 16, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Holger Szillat, Fritz Schwertferger, Bernd Haack, Marcus Schafer
  • Publication number: 20050119436
    Abstract: The present invention relates to a process for preparing organyloxysilyl-terminated polymers which have increased stability toward atmospheric moisture, by reacting hydroxy-terminated organic polymers with isocyanato-functional silanes in the presence of at least one catalyst selected from the group consisting of bismuth and zinc compounds, and to crosslinkable compositions comprising such polymers.
    Type: Application
    Filed: October 21, 2004
    Publication date: June 2, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Wolfgang Ziche, Wolfram Schindler
  • Publication number: 20050113591
    Abstract: The invention provides a continuous process for preparing alkylchlorosilanes from the residues of direct synthesis of alkylchlorosilanes which comprise liquid constituents with a boiling point of at least 70° C. at 1013 hPa and may also contain solids, with hydrogen chloride, by passing the residues at a temperature not above 200° C. and hydrogen chloride at a temperature higher than the latter into a reactor so that the resultant reaction temperature is from 400° C. to 800° C.
    Type: Application
    Filed: November 5, 2004
    Publication date: May 26, 2005
    Applicant: Wacker-Chemie GmbH
    Inventor: Herbert Straussberger
  • Publication number: 20050107520
    Abstract: Aqueous dispersions preparable using (A) an organic compound selected from the group consisting of organosilicon compounds, polyurethanes and their precursor compounds such as polyols and polyisocyanates, crosslinked (poly)epoxides and their precursor compounds such as noncrosslinked and partly crosslinked (poly)epoxides, (poly)amines, (poly)amidoamines, (poly)mercaptans, (poly)carboxylic acids, (poly)carboxylic anhydrides, acrylates and their precursor compounds, and polysulfide-forming polymers, (B) particles partially wettable with water, (C) water and further substances if desired.
    Type: Application
    Filed: October 21, 2004
    Publication date: May 19, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Torsten Gottschalk-Gaudig, Herbert Barthel, Uwe Scheim
  • Publication number: 20050101753
    Abstract: The invention provides a method of increasing the elasticity of moisture-cured elastomers, which comprises adding to alkoxy-cross linking one-component compositions comprising an alkoxysilane-terminated polymer (A) containing end groups of the formula (1) -A-Si(R)a(CH3)3-a??(1) a silane (B), of the general formula (2) X—CH2—Si(R)2(CH3)??(2) where A is a divalent hydrocarbon radical, R is a methoxy or ethoxy group, X is a group R?O—, R?NH—, R?—O—CO—NH, R?—NH—CO—NH— or halogen, R? is hydrogen, an optionally halogen-substituted C1-18 hydrocarbon radical or a radical R?—O—CO— or R?—NH—CO, R? is an optionally halogen-substituted C1-8 hydrocarbon radical, and a is 1, 2 or 3.
    Type: Application
    Filed: October 18, 2004
    Publication date: May 12, 2005
    Applicant: Wacker-Chemie GmbH
    Inventors: Wolfram Schindler, Elke Schwiebacher
  • Patent number: 6878770
    Abstract: The invention relates to novel aqueous compositions containing (1) organosilicon compounds comprising ammonium groups, containing at least one grouping consisting of two protonated nitrogen atoms per molecule, said atoms being linked by at least three carbon atoms, (2) acid anions, the corresponding acids thereof having a pka value higher than 0, (3) water, (4) optionally a solvent which can be mixed with water, and (5) optionally emulsifying agents. Said aqueous compositions are preferably homogeneous aqueous solutions.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: April 12, 2005
    Assignee: Wacker-Chemie GmbH
    Inventors: Christian Herzig, Wolfgang Schattenmann
  • Patent number: 6869643
    Abstract: The present invention relates to a process for the coating and water-repellent impregnation of mineral building materials, in which an architectural coating composition containing from 1 to 30 % by weight of C1-C20-alkyl-C1-C6-alkoxysilane as impregnating agent is applied to the building material. The principal architectural coating compositions are paints and plasters.
    Type: Grant
    Filed: March 1, 1999
    Date of Patent: March 22, 2005
    Assignee: Wacker-Chemie GmbH
    Inventors: Hans Mayer, Ingeborg Koenig-Lumer, Albert Hausberger