Patents by Inventor Georg Loessel
Georg Loessel 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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Publication number: 20230331921Abstract: A process for producing alkyl silicone resins (A) containing at least 80 wt % of units of the general formula (I), R1a(R2O)b(HO)dR3cSiO(4-a-b-c-d)/2 (I), is provided. Alkylalkoxysilane (A1) of the general formula (II), R1aR3cSi(OR2)(4-a-c) (II), is mixed in a first reaction step (R1), alternatively, with a pure acid (S) having pKa of not more than 5, with an at least 5 wt % aqueous solution of an acid (S) having a pKa of not more than 5 or with a halosilane compound (A2) of the general formula (III), R1aR3cSi(X)(4-a-c) (III). Subsequently, in at least one further reaction step, (R2) water is added.Type: ApplicationFiled: October 6, 2020Publication date: October 19, 2023Applicant: Wacker Chemie AGInventors: Volker STANJEK, Dominik JANTKE, Georg LÖSSEL
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Publication number: 20210130550Abstract: Alkylsilicone resins containing at least 20 mol percent of siloxy units bearing a >Cs alkyl group and having from 5-20 weight percent of alkoxy groups may be prepared directly by hydrolysis of chlorosilanes, and are highly effective as bulk hydrophobing agents in the preparation of fibrocement.Type: ApplicationFiled: January 19, 2018Publication date: May 6, 2021Applicant: WACKER CHEMIE AGInventors: Steffen DOERRICH, Georg LOESSEL, Pedro MARANI, Daniel SCHILDBACH, Volker STANJEK
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Patent number: 10851208Abstract: High hydroxyl-content organopolysiloxanes of low molecular weight are prepared in a continuous process by metering in alkoxysilanes and chlorosilanes in a weight proportion of 60:40 or more to a reaction mixture containing water and non-polar solvent, and continuously removing an organic phase containing organopolysiloxanes from the reaction mixture.Type: GrantFiled: November 10, 2016Date of Patent: December 1, 2020Assignee: WACKER CHEMIE AGInventors: Georg Loessel, Manfred Meisenberger
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Patent number: 10689490Abstract: Organopolysiloxanes having an OH content of 3.0-10.0% by weight are produced in a continuous process in which silanes of the formula I R1mSiR2nXo??(I), in which R1 is a C1-C18-hydrocarbon radical and R2 is a C1-C6-alkoxy radical and X is a chlorine or bromine radical m is 1, 2 or 3, n is 0, 1, 2 or 3 and o is 0, 1, 2 or 3, with the proviso that 4?m=n+o, and that in at least 30 mol % of the silanes of the general formula I, n?0 und o?0, water, and water-insoluble non-polar solvent are metered in continuously into a reactor to form a reaction mixture and the reaction mixture is continuously discharged from the reactor.Type: GrantFiled: November 2, 2016Date of Patent: June 23, 2020Assignee: WACKER CHEMIE AGInventors: Georg Loessel, Frank Betschinger, Manfred Meisenberger
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Publication number: 20190270851Abstract: High hydroxyl-content organopolysiloxanes of low molecular weight are prepared in a continuous process by metering in alkoxysilanes and chlorosilanes in a weight proportion of 60:40 or more to a reaction mixture containing water and non-polar solvent, and continuously removing an organic phase containing organopolysiloxanes from the reaction mixture.Type: ApplicationFiled: November 10, 2016Publication date: September 5, 2019Applicant: WACKER CHEMIE AG.Inventors: Georg LOESSEL, Manfred MEISENBERGER
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Publication number: 20190040206Abstract: Organopolysiloxanes having an OH content of 3.0-10.0% by weight are produced in a continuous process in which silanes of the formula I R1mSiR2nXo ??(I), in which R1 is a C1-C18-hydrocarbon radical and R2 is a C1-C6-alkoxy radical and X is a chlorine or bromine radical m is 1, 2 or 3, n is 0, 1, 2 or 3 and o is 0, 1, 2 or 3, with the proviso that 4?m=n+o, and that in at least 30 mol % of the silanes of the general formula I, n?0 und o?0, water, and water-insoluble non-polar solvent are metered in continuously into a reactor to form a reaction mixture and the reaction mixture is continuously discharged from the reactor.Type: ApplicationFiled: November 2, 2016Publication date: February 7, 2019Applicant: Wacker Chemie AGInventors: Georg LOESSEL, Frank BETSCHINGER, Manfred MEISENBERGER
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Patent number: 10125225Abstract: Multistep continuous and semicontinuous hydrolysis and condensation of chlorosilanes with alcohol containing minimal water in a column in a first step to form a silicone resin intermediate, followed by further condensation provides silicone resins in reproducible fashion substantially free of hydrogen chloride, without reactor gelatin.Type: GrantFiled: July 21, 2016Date of Patent: November 13, 2018Assignee: WACKER CHEMIE AGInventors: Frank Sandmeyer, Georg Loessel, Marko Prasse
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Publication number: 20180265640Abstract: Multistep continuous and semicontinuous hydrolysis and condensation of chlorosilanes with alcohol containing minimal water in a column in a first step to form a silicone resin intermediate, followed by further condensation provides silicone resins in reproducible fashion substantially free of hydrogen chloride, without reactor gelatin.Type: ApplicationFiled: July 21, 2016Publication date: September 20, 2018Applicant: Wacker Chemie AGInventors: Frank SANDMEYER, Georg LOESSEL, Marko PRASSE
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Patent number: 9988496Abstract: Highly condensed silicon resins are obtained by a three step continuous procedure without the use of organic solvent, by preliminarily forming a partial alkoxylate by reacting a chlorosilane with alcohol containing no or a minimal amount of water, feeding the partial alkoxylate to a reaction column to form a silicone resin of low degree of condensation, and further condensing the silicone resin intermediate thus formed to produce a silicone resin product.Type: GrantFiled: July 21, 2016Date of Patent: June 5, 2018Assignee: WACKER CHEMIE AGInventors: Frank Sandmeyer, Georg Loessel, Marko Prasse
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Patent number: 9988498Abstract: Organopolysiloxanes having an OH content of from 3.0-10.0 weight percent are continuously produced by continuously feeding chlorosilanes, alkoxysilanes, water, and nonpolar solvent essentially non-miscible in water, continuously discharging a reaction mixture containing organopolysiloxanes dissolved in a solvent phase, and optionally separating organopolysiloxanes from the solvent phase, wherein the chlorosilanes and alkoxysilanes are added in respective weight fractions of 95-60% and 5-40% based on the total weight of chlorosilanes and alkoxysilanes. The process does not employ and polar solvents, and produces products with improved flash points while minimizing complexity and expense of waste water treatment.Type: GrantFiled: June 18, 2014Date of Patent: June 5, 2018Assignee: WACKER CHEMIE AGInventors: Georg Loessel, Manfred Meisenberger, Wolfgang Wewers
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Publication number: 20170349709Abstract: Highly condensed silicon resins are obtained by a three step continuous procedure without the use of organic solvent, by preliminarily forming a partial alkoxylate by reacting a chlorosilane with alcohol containing no or a minimal amount of water, feeding the partial alkoxylate to a reaction column to form a silicone resin of low degree of condensation, and further condensing the silicone resin intermediate thus formed to produce a silicone resin product.Type: ApplicationFiled: July 21, 2016Publication date: December 7, 2017Applicant: Wacker Chemie AGInventors: Frank SANDMEYER, Georg LOESSEL, Marko PRASSE
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Patent number: 9688819Abstract: Addition-crosslinkable silicone resin compositions containing a branched organopolysiloxane bearing each of Si—H groups, alkenyl groups, and aryl groups, and also containing blocks of linear organopolysiloxane free of Si—H and alkenyl groups with a chain length of at least three siloxy groups, and further bearing at least one aryl group, serve as excellent potting compositions for electronic devices, particularly LEDs, with high refractive index and optical transmittance, and wide processing latitude.Type: GrantFiled: July 30, 2014Date of Patent: June 27, 2017Assignee: WACKER CHEMIE AGInventors: Frank Sandmeyer, Enno Funk, Georg Loessel
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Publication number: 20160194452Abstract: Addition-crosslinkable silicone resin compositions containing a branched organopolysiloxane bearing each of Si—H groups, alkenyl groups, and aryl groups, and also containing blocks of linear organopolysiloxane free of Si—H and alkenyl groups with a chain length of at least three siloxy groups, and further bearing at least one aryl group, serve as excellent potting compositions for electronic devices, particularly LEDs, with high refractive index and optical transmittance, and wide processing latitude.Type: ApplicationFiled: July 30, 2014Publication date: July 7, 2016Inventors: Frank SANDMEYER, Enno FUNK, Georg LOESSEL
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Publication number: 20160145396Abstract: Organopolysiloxanes having an OH content of from 3.0-10.0 weight percent are continuously produced by continuously feeding chlorosilanes, alkoxysilanes, water, and non-polar solvent essentially non-miscible in water, continuously discharging a reaction mixture containing organopolysiloxanes dissolved in a solvent phase, and optionally separating organopolysiloxanes from the solvent phase, wherein the chlorosilanes and alkoxysilanes are added in respective weight fractions of 95-60% and 5-40% based on the total weight of chlorosilanes and alkoxysilanes. The process does not employ and polar solvents, and produces products with improved flash points while minimizing complexity and expense of waste water treatment.Type: ApplicationFiled: June 18, 2014Publication date: May 26, 2016Inventors: Georg LOESSEL, Manfred MEISENBERGER, Wolfgang WEWERS
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Patent number: 8710254Abstract: Silsesquisiloxanes are produced in high yield and purity in a minimal number of process steps by reacting quaternary ammonium silicates with disiloxanes in a precipitant liquid which causes the silsesquisiloxane product to be precipitated in high purity.Type: GrantFiled: October 6, 2010Date of Patent: April 29, 2014Assignee: Wacker Chemie AGInventors: Georg Loessel, Manfred Meisenberger
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Publication number: 20120203019Abstract: Silsesquisiloxanes are produced in high yield and purity in a minimal number of process steps by reacting quaternary ammonium silicates with disiloxanes in a precipitant liquid which causes the silsesquisiloxane product to be precipitated in high purity.Type: ApplicationFiled: October 6, 2010Publication date: August 9, 2012Applicant: WACKER CHEMIE AGInventors: Georg Loessel, Manfred Meisenberger
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Patent number: 7666969Abstract: One-component, H-siloxane-containing addition-crosslinkable silicone resins, are prepared by charging a reactor with water and a solvent mixture of at least one aromatic solvent and at least one alkyl ester, adding a chlorosilane mixture containing an Si—H functional silane and a silane bearing an unsaturated hydrosilylatable group with stirring, the temperature not being above 50° C., separating an aqueous phase comprising a one-component, H-siloxane-containing addition-crosslinkable silicone resin, and washing the phase comprising the one-component, H-siloxane-containing addition-crosslinkable silicone resin in at least two washing steps to reduce residual HCl content, a final washing carried out using a 0.01%-1.0% strength aqueous solution of a base with a pH between 7.00-8.50, at a temperature of 20-50° C.Type: GrantFiled: May 10, 2007Date of Patent: February 23, 2010Assignee: Wacker Chemie AGInventors: Georg Loessel, Manfred Meisenberger, Gerhard Staiger
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Publication number: 20070265410Abstract: One-component, H-siloxane-containing addition-crosslinkable silicone resins, are prepared by charging a reactor with water and a solvent mixture of at least one aromatic solvent and at least one alkyl ester, adding a chlorosilane mixture containing an Si—H functional silane and a silane bearing an unsaturated hydrosilylatable group with stirring, the temperature not being above 50° C., separating an aqueous phase comprising a one-component, H-siloxane-containing addition-crosslinkable silicone resin, and washing the phase comprising the one-component, H-siloxane-containing addition-crosslinkable silicone resin in at least two washing steps to reduce residual HCl content, a final washing carried out using a 0.01%-1.0% strength aqueous solution of a base with a pH between 7.00-8.50, at a temperature of 20-50° C.Type: ApplicationFiled: May 10, 2007Publication date: November 15, 2007Applicant: WACKER CHEMIE AGInventors: Georg Loessel, Manfred Meisenberger, Gerhard Staiger
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Publication number: 20060107876Abstract: Water-repellent gypsum compositions of components (A) 100 parts by weight of gypsum (B) 0.05-50 parts by weight of oxide and/or hydroxide or alkali and/or alkaline earth metals (C) 0.05-20 parts by weight of glycol-functional siloxane mixture, preparable by the reaction of 1 mole of alkyltrihalosilane or alkyltrialkoxysilane with at least 2.5 moles of a glycol or mixture of glycols, exhibit water repellancy similar to gypsum which has been hydrophobed with H-siloxane.Type: ApplicationFiled: November 18, 2005Publication date: May 25, 2006Applicant: Wacker-Chemie GmbHInventors: Frank Sandmeyer, Georg Loessel, Dieter Gerhardinger