Patents by Inventor Helmut Oswaldbauer
Helmut Oswaldbauer 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: 8507618Abstract: Composition comprising (A) 50-99.5 wt %, based on the total weight, of A, B and C of a reaction resin or reaction resin mixture that is processed into thermosetting materials, said resin or resin mixture being liquid at temperatures in the range of 15 to 100° C. and having an average molecular weight of 200 to 500,000 and with a sufficient number of suitable reactive groups for a curing process and (B) 0.5-50 wt %, relative to the total weight of A, B and C of one or more dispersed polyorganosiloxanes that are contained in the reaction resin or reaction resin mixture homogeneously in finely distributed form as polyorganosiloxane droplets with a diameter of 0.001 to 4 ?m, wherein the organopolysiloxane particle is a polymer of the general formula (R3SiO1/2)W(R2SiO2/2)X—(RSiO3/2)Y—(SiO4/2)Z, where w=0 to 20 Mol %, x=80 to 99.9 Mol %, y=0.5 to 10 Mol %, z=0 to 10 Mol %, (C) 0.Type: GrantFiled: November 20, 2009Date of Patent: August 13, 2013Assignee: Wacker Chemie AGInventors: Oliver Schäfer, Helmut Oswaldbauer
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Publication number: 20110237761Abstract: Composition comprising (A) 50-99.5 wt %, based on the total weight, of A, B and C of a reaction resin or reaction resin mixture that is processed into thermosetting materials, said resin or resin mixture being liquid at temperatures in the range of 15 to 100° C. and having an average molecular weight of 200 to 500,000 and with a sufficient number of suitable reactive groups for a curing process and (B) 0.5-50 wt %, relative to the total weight of A, B and C of one or more dispersed polyorganosiloxanes that are contained in the reaction resin or reaction resin mixture homogeneously in finely distributed form as polyorganosiloxane droplets with a diameter of 0.001 to 4 ?m, wherein the organopolysiloxane particle is a polymer of the general formula (R3SiO1/2)w(R2SiO2/2)x- (RSiO3/2)y- (SiO4/2)z, where w=0 to 20 Mol %, x=80 to 99.9 Mol %, y=0.5 to 10 Mol %, z=0 to 10 Mol %, (C) 0.Type: ApplicationFiled: November 20, 2009Publication date: September 29, 2011Applicant: Wacker Chemie AGInventors: Oliver Schäfer, Helmut Oswaldbauer
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Publication number: 20100305273Abstract: Thermoset polymer systems are toughened without compromising other polymer properties by including 0.5 to 50 weight percent of 0.001 to 0.4 ?m monodisperse core/shell polymers having at least an inner core of a silicone polymer and an outer core of organopolymer.Type: ApplicationFiled: May 19, 2008Publication date: December 2, 2010Applicant: WACKER CHEMIE AGInventors: Oliver Schaefer, Helmut Oswaldbauer
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Publication number: 20100086783Abstract: Redispersible core/shell elastomeric particles are prepared by a process wherein a silicone elastomer core is covered with a second silicone shell, followed by an organic polymer shell.Type: ApplicationFiled: January 25, 2008Publication date: April 8, 2010Applicant: WACKER CHEMIE AGInventors: Oliver Schaefer, Helmut Oswaldbauer, Christina Bauer
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Publication number: 20070213474Abstract: Particulate additives which may be added to thermoset or thermoplastic polymers while maintaining transparency comprise core/shell polysiloxane graft polymers having a silicone core, optionally an inner addition polymer core within the silicone core, and an addition polymer shell. The silicone core is derived from at least one monomer having conjugated electron pairs.Type: ApplicationFiled: April 28, 2005Publication date: September 13, 2007Applicant: WACKER CHEMIE AGInventors: Jochen Ebenhoch, Andreas Bacher, Helmut Oswaldbauer
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Patent number: 6147142Abstract: Previously cross-linked silicone elastomer particles with an organic-polymer shell are used as constituents for formulating aqueous coating compositions based on water-soluble or water-dilutable binders. The silicone elastomer particles contain: (a) 5 to 95% by weight, with respect to the total weight of the copolymer, of a nuclear polymer of general formula (R.sub.2 SiO.sub.2/2).sub.x (RSiO.sub.3/2).sub.y (SiO.sub.4/2).sub.z, in which x=5 to 99.5% by mole, y=0.5 to 95% by mole, z=0 to 30% by mole, and (b) 5 to 95% by weight, with respect to the total weight of the copolymer of a shell made of an organopolymer from mono- or poly-ethylenically unsaturated monomers; and R stands for the same or different monovalent alkyl or alkenyl radicals with 1 to 6 carbon atoms, aryl radicals or substituted hydrocarbon radicals.Type: GrantFiled: September 28, 1998Date of Patent: November 14, 2000Assignee: Wacker-Chemie GmbHInventors: Michael Geck, Walter Goeblmeier, Bernward Deubzer, Ekkehard Patrick, Helmut Oswaldbauer
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Patent number: 5523365Abstract: The invention relates to crosslinked organopolysiloxanes which contain groups which form free radicals and are built up from units of the formula[R.sub.a Si(O.sub.(3-a)/2)-R.sup.1 -X-(R.sup.1 -Si(O.sub.(3-a)/2)).sub.b R.sub.a ] (1),in whichX is a radical from the group consisting of --N.dbd.N--, --O--O--, --S--S-- and --C(C.sub.6 H.sub.5).sub.2 --C(C.sub.6 H.sub.5).sub.2 --, andR is monovalent SiC-bonded, optionally substituted C.sub.1 - to C.sub.18 -hydrocarbon radicals,R.sup.1 is divalent SiC-bonded, optionally substituted C.sub.1 - to C.sub.18 -hydrocarbon radicals which can be interrupted by divalent radicals, bonded to carbon atoms on both sides, from the group consisting of --O--, --COO--, --OOC--, --CONR.sup.2 --, --NR.sup.2 CO-- and --CO--,R.sup.2 is a hydrogen atom or a radical R,a has the values 0, 1 or 2 andb has the values 0 or 1,and further organosiloxane units. The organopolysiloxanes are used as free radical macroinitiators for grafting polymerization of ethylenically unsaturated monomers.Type: GrantFiled: October 11, 1994Date of Patent: June 4, 1996Assignee: Wacker-Chemie GmbHInventors: Michael Geck, Jochen Dauth, Bernward Deubzer, Helmut Oswaldbauer, Manfred Schmidt, Frank Baumann
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Patent number: 5401821Abstract: Process for the preparation of an organopolysiloxane resin, which comprisesin a first stage reacting at least one silane of the formulaR.sub.a Si(OR.sup.1).sub.4-a (I)in which a has a value of 0, 1, 2 or 3, R and R.sup.1 are monovalent organic radicals which may be the same or different and/or a partial hydrolyzate thereof, with the proviso that at least one silane of formula (I), where a is 0 or 1 and/or a partial hydrolyzate thereof is employed, and optionally an organo(poly)siloxane with water in the presence of a poly-protic acid and optionally other substances, subsequently partly neutralizing the acid by addition of a base and then distilling off at least some of the compound R.sup.1 OH formed,in a second stage reacting the homogeneous reaction mass resulting from the first stage in the presence of a base and a water-insoluble organic solvent and distilling off the water and the compound R.sup.Type: GrantFiled: December 13, 1993Date of Patent: March 28, 1995Assignee: Wacker-Chemie GmbHInventors: Michael Geck, Christian Herzig, Bernward Deubzer, Helmut Oswaldbauer
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Patent number: 5386007Abstract: The present invention relates to siloxane copolymers containing alkenyl groups and a process for their preparation. The siloxane copolymers of the present invention can be used in cross-linkable compositions for the production of coatings which repel tacky substances, an example of which would include coatings for release papers or films.Type: GrantFiled: January 10, 1994Date of Patent: January 31, 1995Assignee: Wacker-Chemie GmbHInventors: Christian Herzig, Michael Geck, Alfred Rengstl, Friedrich Hockemeyer, Helmut Oswaldbauer
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Patent number: 5359022Abstract: A process for preparing an organopolysiloxane resin, which comprises reacting in a first stage at least one silane of the formulaR.sub.a Si(OR.sup.1).sub.4-a (I)in which a is 0, 1, 2 or 3, R is a monovalent organic radical, and/or a partial hydrolyzate thereof, with the proviso that at least one silane of formula (I) in which a is equal to 0 or 1, and/or a partial hydrolyzate thereof, is employed, and, if appropriate, an organo(poly) siloxane with water in the presence of acid and, if appropriate, other substances, in a second stage reacting the reaction mixture obtained from the first stage in the presence of base and, if appropriate, other substances, and in a third stage adding with stirring, the reaction mixture obtained in the second stage into water, and if appropriate mixed with additives.Type: GrantFiled: November 3, 1993Date of Patent: October 25, 1994Assignee: Wacker Chemie GmbHInventors: Konrad Mautner, Richard Weidner, Helmut Oswaldbauer
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Patent number: 5281657Abstract: A process for preparing organopolysiloxane hydrosols by mixing an organosilicon compound with water, which comprises mixing a silane of the formulaR.sub.a Si(OR.sup.1).sub.4-a (I)where a is 0, 1, 2 or 3, R can be the same or different and is a hydrogen atom or a monovalent organic radical, R.sup.1 can be the same or different and is a monovalent organic radical, and/or a partial hydrolysis product thereof and, optionally, an organodisiloxane of the formulaR.sup.2.sub.3 Si-O-SiR.sup.2.sub.3 (II)where R.sup.2 can be the same or different and is the same as R, with water in the presence of an emulsifier at a temperature below 15.degree. C.Type: GrantFiled: August 16, 1993Date of Patent: January 25, 1994Assignee: Wacker-Chemie GmbHInventors: Konrad Mautner, Bernward Deubzer, Helmut Oswaldbauer, Hilmar Sinner
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Patent number: 5049636Abstract: Organosols of organopolysiloxanes are prepared by adding water-soluble organic solvents or mixtures thereof or water-soluble mixtures of water-soluble and water-insoluble organic solvents to aqueous, colloidal suspensions of organopolysiloxanes obtained by adding at least one alkoxysilane and/or the partial hydrolyzate thereof, and, if appropriate, mixed with an organo(poly)siloxane free of alkoxy groups and having a maximum of 8 siloxane units per molecule, to water in the presence of emulsifiers at a maximum rate of 5 moles of organosilicon compound per hour and per liter of water, and subsequently removing the water by distillation.Type: GrantFiled: March 30, 1989Date of Patent: September 17, 1991Assignee: Wacker-Chemie GmbHInventors: Matthias Wolfgruber, Bernward Deubzer, Volker Frey, Helmut Oswaldbauer