Patents by Inventor Karl-Heinrich Wegehaupt
Karl-Heinrich Wegehaupt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4975510Abstract: A process for preparing diorganopolysiloxanes containing terminal triorganosiloxy groups which comprises reacting in a 1st step, a cyclic diorganopolysiloxane and/or diorganodichlorosilane hydrolyzate with from 0.05 to 3 percent by weight of triorganochlorosilane, based on the weight of the cyclic diorganopolysiloxane and/or diorganodichlorosilane hydrolyzate employed in the presence of from 1 to 50 ppm by weight of phosphonitrile chloride, based on the total weight of the organosilicon compounds employed, to form a reaction mixture containing .alpha.-triorganosiloxy-.omega.-chlorodiorganopolysiloxane, and in a 2nd step, adding to the reaction mixture obtained in the 1st step and containing the .alpha.-triorganosiloxy-.omega.-chlorodiorganopolysiloxane, a diorganopolysiloxane having one Si-bonded hydroxyl group in each of the terminal units in an amount of from 1 to 1.Type: GrantFiled: November 14, 1988Date of Patent: December 4, 1990Assignee: Wacker-Chemie GmbHInventors: Karl-Heinrich Wegehaupt, Karl Braunsperger, Jorg Patzke
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Patent number: 4902813Abstract: A process for preparing diorganopolysiloxanes having terminal Si-bonded hydroxyl groups which comprises reacting an organosilicon compound selected from a cyclic diorganopolysiloxane, a diorganodichlorosilane hydrolysis product and mixtures thereof with from 0.1 to 3 percent by weight of a diorganodichlorosilane, based on the weight of the organosilicon compound, i.e., the cyclic diorganopolysiloxane and/or diorganodichlorosilane hydrolysis product employed, in the presence of from 1 to 50 ppm by weight of phosphonitrile chloride, based on the total weight of the organosilicon compound and diorganodichlorosilane employed, to form diorganopolysiloxanes containing an Si-bonded chlorine atom in each of the terminal units, then treating the reaction mixture with water or an aqueous solution, separating off the aqueous phase from the diorganopolysiloxanes containing an Si-bonded hydroxyl group in each of the terminal units and thereafter removing the low boiling constituents by distillation.Type: GrantFiled: December 7, 1988Date of Patent: February 20, 1990Assignee: Wacker-Chemie GmbHInventors: Karl-Heinrich Wegehaupt, Karl Braunsperger, Gunter von Au, Fridolin Stary
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Patent number: 4855378Abstract: Organosilicon compounds and organopolysiloxane compositions which are crosslinked by the addition of Si-bonded hydrogen with SiC-bonded vinyl groups and contain the organosilicon compounds as additives for improving the adhesion of the resultant elastomers on the substrates on which they are formed.Type: GrantFiled: September 4, 1987Date of Patent: August 8, 1989Assignee: Wacker-Chemie GmbHInventors: Ferdinand Pradl, Carlos Weise, Karl-Heinrich Wegehaupt
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Patent number: 4804579Abstract: The invention relates to thermoinsulating moldings containing porous, inorganic thermoinsulating materials and having an organopolysiloxane coating thereon, in which an uncoated thermoinsulating molding is coated with a diorganopolysiloxane containing rod-shaped styrene-(meth)acrylate copolymers which are obtained from a free radical copolymerization of styrene and (meth)acrylate in the presence of the diorganopolysiloxane.Type: GrantFiled: February 29, 1988Date of Patent: February 14, 1989Assignee: Wacker-Chemie GmbHInventors: Dieter Gerhardinger, Johannes Reisacher, Gunter Stohr, Karl-Heinrich Wegehaupt
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Patent number: 4649066Abstract: The present invention relates to a corrosion resistant coating for metal reinforcing structures that are used in porous concrete which comprises coating the metal reinforcing structures with an organopolysiloxane elastomer obtained by crosslinking a diorganopolysiloxane-based composition by the condensation reaction or by the addition of Si-bonded hydrogen to an aliphatic carbon-carbon double bond, in which the composition contains a copolymer that is obtained via a free radical copolymerization of styrene and a (meth)acrylic acid ester in the presence of the diorganopolysiloxane.Type: GrantFiled: November 14, 1985Date of Patent: March 10, 1987Assignee: Wacker-Chemie GmbHInventors: Dieter Gerhardinger, Karl-Heinrich Wegehaupt, Hans-Rudolf Pfeffer
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Patent number: 4637958Abstract: A method for improving the adhesion of elastomers derived from compositions which are crosslinked by a condensation reaction and which are based on diorganopolysiloxanes containing rod-shaped copolymers formed by the free-radical copolymerization of styrene and (meth)acrylic acid ester in the presence of the diorganopolysiloxanes, to an undercoating consisting of an epoxy resin and pitch or tar, which comprises applying a primer having SiC-bonded organic groups to the undercoating prior to the application of the crosslinkable composition, in which the primer consists of a solution of(a) a copolymer of a (meth)acrylic acid ester free of silicon atoms and a (meth)acryloxyalkylsilane containing at least one SiOC-bonded monovalent organic group; and(b) a silane which contains a SiC-bonded organic group having at least one amino or imino group and which contains at least one SiOC-bonded monovalent organic group and/or a partial hydrolyzate of such silane in an organic solvent.Type: GrantFiled: April 5, 1985Date of Patent: January 20, 1987Assignee: Wacker-Chemie GmbHInventors: Karl-Heinrich Wegehaupt, Hans-Rudolf Pfeffer
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Patent number: 4600657Abstract: Asphaltic concrete surfaces are protected from undesirable changes by applying a composition comprising a diorganopolysiloxane containing rod-shaped styrene-n-butyl acrylate copolymers which are obtained from the free-radical copolymerization of said monomers in the presence of the diorganopolysiloxane onto an asphaltic concrete surface and thereafter crosslinking the diorganopolysiloxane composition to form an elastomeric coating thereon. The asphaltic concrete surface may be coated with a primer prior to the application of the crosslinkable diorganopolysiloxane composition in order to improve the adhesion of the resultant crosslinked elastomer containing the rod-shaped copolymers. These asphaltic concrete coatings are especially useful in, for example, hydraulic engineering.Type: GrantFiled: February 1, 1985Date of Patent: July 15, 1986Assignee: Wacker-Chemie GmbHInventors: Karl-Heinrich Wegehaupt, Rudolf Pusch, Hans R. Pfeffer
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Patent number: 4577040Abstract: A method for preparing diorganopolysiloxanes containing fluoroalkyl and/or fluoroalkyloxyalkyl groups which comprises hydrolyzing dichlorosilanes containing fluororalkyl and/or fluoroalkyloxyalkyl groups and thereafter equilibrating the hydrolyzed product in the presence of a compound having the formula[R.sub.3.sup.5 R.sup.6 N]OHwhere R.sup.5 is an alkyl radical having from 1 to 4 carbon atoms and R.sup.6 is the same as R.sup.5 or a benzyl radical.Type: GrantFiled: November 16, 1983Date of Patent: March 18, 1986Assignee: Wacker-Chemie GmbHInventors: Rudolf Kaufmann, Karl Braunsperger, Karl-Heinrich Wegehaupt, Gunter von Au
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Patent number: 4503210Abstract: Compositions which are stable in the absence of moisture, but crosslink to form elastomers in the presence of moisture at room temperature comprising a diorganopolysiloxane having terminal condensable groups and a silicon compound having at least three oxime groups per molecule bonded to silicon via oxygen, in which a mixture containing a silane having four oxime groups bonded to a silicon atom via oxygen, and a silane having a hydrocarbon radical bonded to a silicon atom via a SiC-bonding and having three oxime groups bonded to the silicon atom via oxygen, or an oligomer of the silane mixture is substituted for at least a portion of the silicon compound having at least three oxime groups per molecule bonded to silicon via oxygen.Type: GrantFiled: January 25, 1984Date of Patent: March 5, 1985Assignee: Wacker-Chemie GmbHInventors: G/u/ nter Von Au, Karl-Heinrich Wegehaupt, August Schiller, Karl Braunsperger
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Patent number: 4456542Abstract: Hydrophobic fibers are prepared by treating fibers with a composition containing an organopolysiloxane having Si-bonded hydrogen atoms as essentially its only reactive group, and a platinum catalyst which is inhibited by a compound which is volatile under the conditions at which the organopolysiloxane containing Si-bonded hydrogen atoms is deposited on the fiber.Type: GrantFiled: February 25, 1983Date of Patent: June 26, 1984Assignee: Wacker Chemie GmbHInventors: Wolfgang Wagner, Matthias Scherer, Karl-Heinrich Wegehaupt, Volker Frey
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Patent number: 4399193Abstract: Hydrophilic coatings are obtained by applying to a substrate a composition containing an aqueous soluble organopolysiloxane which is capable of being crosslinked by the addition of Si-bonded hydrogen atoms to SiC-bonded aliphatic multiple bonds, and having at least one oxyalkylene unit bonded to a silicon atom and an aqueous soluble catalyst which promotes the addition of Si-bonded hydrogen atoms to the SiC-bonded aliphatic multiple bonds and thereafter crosslinking the organopolysiloxane by the addition of the Si-bonded hydrogen atoms to the SiC-bonded aliphatic multiple bonds to form a hydrophilic coating on the substrate. The aqueous soluble organopolysiloxane may be obtained from a mixture consisting of equal parts of a mixed hydrolysate, prepared from 1.7 moles of dimethyldichlorosilane, 1 mole of [acetoxy-(hexaethyleneoxy)propyl]-methyldichlorosilane and 0.Type: GrantFiled: August 24, 1981Date of Patent: August 16, 1983Assignee: Wacker-Chemie GmbHInventors: Gerhard Preiner, Johann Muller, Karl-Heinrich Wegehaupt
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Patent number: 4301056Abstract: Elastomers which are obtained by crosslinking an organopolysiloxane composition containing a diorganopolysiloxane, an organic peroxide and calcium hydroxide which has been treated with an organosilicon compound to impart hydrophobic properties thereto.Type: GrantFiled: March 13, 1980Date of Patent: November 17, 1981Assignee: Wacker-Chemie GmbHInventors: Jorg Patzke, Karl-Heinrich Wegehaupt
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Patent number: 4292423Abstract: Organopolysiloxanes having substituted carbamoyloxy groups (.tbd.SiOCO--NH--) bonded to silicon via oxygen, which are prepared by reacting an organopolysiloxane containing Si-bonded hydroxyl groups with an organic isocyanate in the presence of an organic tin compound.The stability of the organopolysiloxanes containing carbamoyloxy groups may be improved if the organopolysiloxane having Si-bonded hydroxyl groups is reacted with an organic isocyanate in the presence of an organic tin compound which is supported on a solid carrier and then the reaction product is filtered under anhydrous conditions to remove the supported organic tin compound.Type: GrantFiled: March 27, 1980Date of Patent: September 29, 1981Assignee: Wacker-Chemie GmbHInventors: Rudolf Kaufmann, Johann Muller, Karl-Heinrich Wegehaupt
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Patent number: 4276252Abstract: Silicon containing compounds having Si-bonded hydrogen are added to an aliphatic multiple bond in the presence of a platinum catalyst selected from the group consisting of platinum compounds of the formula(R.sup.1)PtX.sub.2,where R.sup.1 represents a cyclic hydrocarbon radical or a substituted cyclic hydrocarbon radical having 2 aliphatic carbon-carbon double bonds, X is the same or different halogen atoms and/or the same or different alkyl radicals, and compounds of the formula(R.sub.2 SO)(Z)PtY.sub.2where R represents the same or different hydrocarbon radicals or substituted hydrocarbon radicals, Z represents a hydrocarbon having a carbon-carbon double bond and Y represents the same or different halogen atoms.An example of a platinum compound having the general formula(R.sup.1)PtX.sub.2,is dicyclopentadiene-platinum dichloride, while an example of a platinum compound having the general formula(R.sub.2 SO)(Z)PtY.sub.2is dimethylsulfoxide-ethylene-platinum-(II)-dichloride.Type: GrantFiled: October 17, 1979Date of Patent: June 30, 1981Assignee: Wacker-Chemie GmbHInventors: Gerhard Kreis, Karl-Heinrich Wegehaupt
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Patent number: 4203913Abstract: A method for stabilizing organopolysiloxanes which are obtained from the condensation and/or equilibration of organosilicon compounds in the presence of phosphoronitrile chlorides which comprises treating the organopolysiloxanes with ammonia or an amine of the general formulaYHNC(CH.sub.3).sub.n (CH.sub.2 X).sub.3-nin which each X represents a hydrogen atom or a radical of the formulae --OCH.sub.3, --N(CH.sub.3).sub.2, --C(CH.sub.3).sub.3, --C(CH.sub.3).sub.2 NHY and --OC(CH.sub.3).sub.3 ; Y represents a hydrogen atom or a trimethylsilyl radical and n represents 0, 1, 2 or 3.Type: GrantFiled: May 17, 1976Date of Patent: May 20, 1980Assignee: Wacker-Chemie GmbHInventors: Jurgen Burkhardt, Karl-Heinrich Wegehaupt
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Patent number: 4130707Abstract: The invention relates to adhesive compositions comprising vinyl containing organopolysiloxanes, organopolysiloxanes having Si-bonded hydrogen atoms and catalysts which promote the addition of the Si-bonded hydrogen atoms to the vinyl groups.These adhesives may be combined with other electrically conductive materials and used in connecting flexible heating resistors to electrodes.Type: GrantFiled: May 4, 1977Date of Patent: December 19, 1978Assignee: Wacker-Chemie GmbHInventors: Manfred Leiser, Karl-Heinrich Wegehaupt, Wilhelm Marsch
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Patent number: 4059559Abstract: An improved process for preparing N-triorganosilylcarbamide acid esters by reacting in the substantial absence of a solvent a carbamide acid ester having two hydrogen atoms linked to the nitrogen atom with a hexaorganodisilazane and a triorganohalosilane and thereafter separating the resultant N-triorganosilylcarbamide acid ester from ammonium halide.Type: GrantFiled: August 11, 1975Date of Patent: November 22, 1977Assignee: Wacker-Chemie GmbHInventors: Jurgen Burkhardt, Paul Hittmair, Karl-Heinrich Wegehaupt
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Patent number: 4051454Abstract: The invention relates to adhesive compositions comprising vinyl containing organopolysiloxanes, organopolysiloxanes having Si-bonded hydrogen atoms and catalysts which promote the addition of the Si-bonded hydrogen atoms to the vinyl groups.These adhesives may be combined with other electrically conductive materials and used in connecting flexible heating resistors to electrodes.Type: GrantFiled: February 3, 1975Date of Patent: September 27, 1977Assignee: Wacker-Chemie GmbHInventors: Manfred Leiser, Karl-Heinrich Wegehaupt, Wilhelm Marsch