Patents by Inventor Hans-Joachim Kotzsch
Hans-Joachim Kotzsch 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: 6727375Abstract: An apparatus for continuously preparing substantially halogen-free, in particular chlorine-free, trialkoxysilanes of the general formula I (RO)3SiH (I) in which R is an alkyl group having from 1 to 6 carbon atoms, has a main reactor unit (1), at least one metering unit (2, 3, 4) for liquids and/or suspensions, located upstream of the main reactor, and at least one metering unit (5) for gaseous and/or vaporous substances, and also a product workup unit (6) located downstream of the main reactor. A process for preparing substantially halogen-free trialkoxysilanes of the general formula I in which silicon is reacted with alcohols in an inert solvent utilizes at least one organocopper compound catalyst.Type: GrantFiled: March 29, 2002Date of Patent: April 27, 2004Assignee: Degussa AGInventors: Frank Steding, Gerda Grund, Burkhard Standke, Frank Kropfgans, Michael Horn, Albert-Johannes Frings, Jaroslaw Monkiewicz, Hans-Günther Srebny, Claus-Dietrich Seiler, Hans-Joachim Kötzsch
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Publication number: 20020188146Abstract: An apparatus for continuously preparing substantially halogen-free, in particular chlorine-free, trialkoxysilanes of the general formula IType: ApplicationFiled: March 29, 2002Publication date: December 12, 2002Applicant: Degussa AGInventors: Frank Steding, Gerda Grund, Burkhard Standke, Frank Kropfgans, Michael Horn, Albert-Johannes Frings, Jaroslaw Monkiewicz, Hans-Gunther Srebny, Claus-Dietrich Seiler, Hans-Joachim Kotzsch
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Patent number: 6294682Abstract: The invention concerns solutions of alkoxides containing titanium and/or zirconium and/or hafnium and magnesium and/or calcium and/or strontium and/or barium of general formula (I): [MII(OR)2-y(OR1)y]n.[MIV(OR1)4-z(OR)2], in which: MII means magnesium and/or calcium and/or strontium and/or barium; MIV titanium and/or zirconium and/or hafnium; R is an alkyl group with 1 to 18 carbon atoms; R1 is an alkyl group with 1 to 18 carbon atoms, y has a value of between 0 to 2; z has a value of 0 and 4; and n is a number between 0.001 and 3, with the exception that n cannot be 1 when y is 2 and z is 0, or when y is 0 and z is 4. The invention further concerns the production of these alkoxides and their use.Type: GrantFiled: June 19, 2000Date of Patent: September 25, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Hartwig Rauleder, Burkhard Standke, Michael Horn, Hans-Joachim Kotzsch, Hans-Gunther Srebny
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Patent number: 5629400Abstract: The invention relates to water-based organopolysiloxane containing compositions which are essentially free from organic solvents, have a flash point above 70.degree. C. and essentially liberate no alcohols by hydrolysis on dilution with water. The organopolysiloxane-containing compositions according to the invention are obtainable by mixing M mol of water-insoluble organotrialkoxysilanes with Q mol of water-soluble aminoalkylalkoxysilanes in a molar ratio of 0<M/Q.ltoreq.2, adding water to the mixture, adjusting the pH of the reaction mixture to a value of between 1 and 8 and removing alcohol already present and/or formed during the reaction. The process for the preparation of the organopolysiloxane-containing compositions according to the invention and their use are also disclosed.Type: GrantFiled: December 6, 1995Date of Patent: May 13, 1997Assignee: Huels AktiengesellschaftInventors: Burkhard Standke, Albert Frings, Michael Horn, Hans-Joachim Kotzsch, Frank Kropfgans, Jaroslaw Monkiewicz, Claus-Dietrich Seiler, Jim Steinmetz
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Patent number: 5591818Abstract: Disclosed are organosilane polycondensation products prepared by hydrolysis of an hydrogen salt of an aminosilane compound or by hydrolysis of an aminosilane followed by reaction with an alkyl salt. The compounds are useful in forming stable aqueous solutions and as adhesion promoters between inorganic and organic surfaces.Type: GrantFiled: March 29, 1995Date of Patent: January 7, 1997Assignee: Huls AktiengesellschaftInventors: Burkhard Standke, Hartwig Rauleder, Claus-Dietrich Seiler, Hans-Joachim Kotzsch, Hermann Peeters
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Patent number: 5468706Abstract: The present invention relates to a storage-stable solution of a mixture of carbonated magnesium methoxide of the formula Mg(CH.sub.3 O).sub.2 (CO.sub.2).sub.n, carbonated magnesium ethoxide of the formula Mg(C.sub.2 H.sub.5 O).sub.2 (CO).sub.2).sub.n and a carbonated mixed alkoxide of the formula Mg(CH.sub.3 O).sub.x (C.sub.2 H.sub.5 O).sub.y (CO.sub.2).sub.n, in which 0<x, y<2 and x+y=2, in a combination of methanol and ethanol, and processes for the preparation thereof, the magnesium content of the solution being from 0.1 to 11% by weight, based on the total weight of the solution, and the CO.sub.2 content n being from 1.0 to 2.2. The present solutions are used, inter alia, for the preservation of paper and for the preparation of a catalyst for the polymerization of olefins.Type: GrantFiled: December 15, 1993Date of Patent: November 21, 1995Assignee: Huels AktiengesellschaftInventors: Hartwig Rauleder, Burkhard Standke, Hans-Joachim Kotzsch, Reinhold Schork
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Patent number: 5468705Abstract: The present invention relates to a storage-stable solution of carbonated magnesium methoxide of the formula Mg(CH.sub.3 O).sub.2 (CO.sub.2).sub.n in methanol, and processes for their preparation by reacting metallic magnesium with methanol and CO.sub.2 or reacting magnesium methoxide in methanol with CO.sub.2, wherein the magnesium content of the solution is from 0.1 to 8% by weight, based on the total weight of the solution, and the CO.sub.2 content n is from 1 to 2.2. The present solution is used, inter alia, for the preservation of paper or for the preparation of a catalyst for the polymerization of olefins.Type: GrantFiled: December 15, 1993Date of Patent: November 21, 1995Assignee: Huels AktiengesellschaftInventors: Hartwig Rauleder, Burkhard Standke, Hans-Joachim Kotzsch, Reinhold Schork
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Patent number: 5456801Abstract: The invention relates to storage-stable solutions of carbonated magnesium ethylate of the formula Mg(C.sub.2 H.sub.5 O).sub.2 (CO.sub.2).sub.n in ethanol and processes for their preparation, wherein (1) the magnesium content of the solution is 2.5 to 6% by weight, based on the total solution, and the CO.sub.2 content (n) is 1.55 to 1.85, (2) the magnesium content of the solution is 1.5 to 2.5% by weight, based on the total solution, and the CO.sub.2 content (n) being 1.55 to 1.90 or (3) the magnesium content of the solution is less than 1.5% by weight, based on the total solution, and the CO.sub.2 content (n) is 1.55 to 2.2.Type: GrantFiled: October 27, 1993Date of Patent: October 10, 1995Assignee: Huels AktiengesellschaftInventors: Hartwig Rauleder, Burkhard Standke, Hans-Joachim Kotzsch, Reinhold Schork
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Patent number: 5349073Abstract: Isopropoxyalkoxytitanium bis(acetylacetonate) compounds are prepared by admixing diisopropoxytitanium bis(acetylacetonate) with a dialkoxytitanium bis(acetylacetonate), and allowing the mixture to react, optionally at elevated temperatures.Type: GrantFiled: September 14, 1993Date of Patent: September 20, 1994Assignee: Huls AktiengesellschaftInventors: Michael Horn, Hans-Joachim Kotzsch
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Patent number: 5282998Abstract: Mixtures of siloxane oligomers having a degree of oligomerization of 0 to 8, which have no more than one vinyl substituent attached per silicon atom as well as methoxy and/or ethoxy groups, the molar ratio of vinyl groups to alkoxy groups being 1:1 to 1:8, and in addition optionally alkyl substituents of 1 to 18 carbon atoms, the molar ratio of vinyl groups to alkyl groups being 1:0 to 1:8, are prepared by hydrolysis or cohydrolysis of vinyltrialkoxysilanes and optionally tetraalkoxysilanes and alkyltrialkoxysilanes in alcoholic solution in the presence of an acid catalyst with an amount of water calculated for the degree of oligomerization, followed by removal of the catalyst and of the free alcohol. The siloxane oligomer mixture is useful as a crosslinking agent for thermoplastic polyolefins.Type: GrantFiled: June 2, 1992Date of Patent: February 1, 1994Assignee: Huls AktiengesellschaftInventors: Michael Horn, Hans-Joachim Kotzsch
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Patent number: 5210334Abstract: Alkaline earth metal alkylates having a spherical particle habit are prepared by dissolving an alkaline earth metal alkylate in a solvent, adding a second solvent which dissolves the alkaline earth metal alkylate only with difficulty or does not dissolve it at all, but which is homogeneously miscible with the solution of the alkaline earth metal alkylate in the first solvent, removing the first solvent and then removing the second solvent. The particle size can be controlled by means of the shear gradient during the precipitation or by the use of emulsion stabilizers. Emulsion stabilization leads to particles in the size range 0.5 to 20 .mu.m with a particularly narrow particle size distribution. Catalysts for polyolefin synthesis can be prepared on the basis of magnesium alkylates prepared by the process according to the invention. The polymer is advantageous with respect to particle habit and particle size distribution, compared with the prior art.Type: GrantFiled: December 13, 1991Date of Patent: May 11, 1993Assignee: Huels AktiengesellschaftInventors: Burkhart Standke, Hartwig Rauleder, Harald-Jurgen Biangardi, Hans-Joachim Kotzsch
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Patent number: 5208359Abstract: Di-tert.butoxydiacetoxysilane is prepared by reacting tetraacetoxysilane with tert.butanol at a reaction temperature of up to 60.degree. C., and the resulting di-tert.butoxydiacetoxysilane is isolated.Type: GrantFiled: December 20, 1991Date of Patent: May 4, 1993Assignee: Huels AktiengesellschaftInventors: Claus-Dietrich Seiler, Hartwig Rauleder, Hans-Joachim Kotzsch, Reinhold Schork
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Patent number: 5187291Abstract: Acyloxysilanes and carboxylic acid chlorides can be prepared simultaneously and continuously from organochlorosilanes and monocarboxylic acid anhydrides. Catalytically active amounts of organic bases soluble in the reaction mixture, their salts or organic acid amides are employed here.Type: GrantFiled: April 14, 1992Date of Patent: February 16, 1993Assignee: Huls AktiengesellschaftInventors: Claus-Dietrich Seiler, Reinhold Schork, Albert Frings, Hans-Joachim Kotzsch, Hartwig Rauleder
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Patent number: 5107009Abstract: Mercaptosilanes are prepared from haloorganylsilyl compounds and an alkali metal hydrogen sulfide in the presence of a polar, aprotic medium.Type: GrantFiled: July 31, 1991Date of Patent: April 21, 1992Assignee: Huls AktiengesellschaftInventors: Hartwig Rauleder, Claus-Dietrich Seiler, Hans-Joachim Kotzsch, Burkhard Standke
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Patent number: 5087714Abstract: Discoloration of vinylacetoxysilanes is prevented by adding thereto 25 to 500 ppm, based on the amount of vinylacetoxysilane, of 3,5-di-tert.-butylpyrocatechol, 2,6-di-tert.-butyl-4-methylphenol, 2-mercaptobenzimidazole or a mixture thereof.Type: GrantFiled: June 3, 1991Date of Patent: February 11, 1992Assignee: Huels AktiengesellschaftInventors: Claus-Dietrich Seiler, Hartwig Rauleder, Albert Frings, Hans-Joachim Kotzsch
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Patent number: 4987268Abstract: Monoalkylethers of alkyleneglycols and oligoalkyleneglycols are reacted completely with terminally unsaturated alkenyl halides to form terminally mono unsaturated glycolethers as product, wherein initially a complete reaction to the corresponding alcoholate takes place with only one equivalent of alcoholate former, such as alkali metal alcoholate or hydroxide, and two equivalents of glycolmonoether, then the alcoholate is reacted with one equivalent of alkenyl halide, whereupon a mixture of the desired product and the glycolmonoether of the alkali metal halide is filtered or distilled off, then this mixture is reacted with the second equivalent of the alcoholate former, whereupon the recovery of the product takes place by distillation from the reaction mixture and then, after addition of a further equivalent of glycolmonoether to the residue from the product recovery, the reaction of the first and the subsequent steps is repeated.Type: GrantFiled: March 12, 1990Date of Patent: January 22, 1991Assignee: Huels AktiengesellschaftInventors: Hartwig Rauleder, Hans-Joachim Kotzsch, Hans-Joachim Vahlensieck
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Patent number: 4924021Abstract: Disclosed are 2-silacoumaranes and their o-allylphenolsilane monoester precursors and methods for their preparation. The benzene ring of these new compounds may be substituted with halogen and/or alkyl or alkyl halogen moieties. The cyclization of monoester precursor to the desired end products is performed in the presence of catalysts. This cyclization can be performed without the isolation of the o-allyphenolsilane monoester by feeding by the cyclization reactor with the starting products for the preparation of this intermediate directly after they have reacted, or, if trichlorosilane is the starting product, directly after they have been mixed.Among other applications, the invention compounds are suitable for use as adhesion mediators and additives for coating compositions.Type: GrantFiled: July 6, 1987Date of Patent: May 8, 1990Assignee: Huels AktiengesellschaftInventors: Hans-Joachim Kotzsch, Hans-Joachim Vahlensieck
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Patent number: 4824979Abstract: Disclosed is a new method for the preparation of metallic acid esters of titanium, zirconium or hafnium wherein a halide of the metal reacts with an organosilane ester, resulting in the formation of partial esters of the metallic acids. The degree of esterification of the metallic acid ester can be controlled based on the organosilane ester and it is possible to obtain complete esterification of the metal halides. The metallic acid partial esters prepared by the method are very pure, and can be separated selectively from the mixture in a simple manner. The metallic acid alkyl esters obtained can very easily be further esterified to the metallic acid tetraalkyl esters with the formation of very pure tetraalkyl esters.Type: GrantFiled: December 18, 1985Date of Patent: April 25, 1989Assignee: Huels Troisdorf AGInventors: Hans-Joachim Kotzsch, Hans-Gunther Srebny, Hans-Joachim Vahlensieck
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Patent number: 4789752Abstract: The present invention relates to the esterification of the halides of titanium, zirconium or hafnium. The esterification takes place in two steps. The first step is performed in the absence of acid acceptors, and the alcohol is introduced into the metal halide dissolved in a solvent, without any appreciable contact with the gas phase. The reactor must be held at the boiling temperature. In this step at least half of the alcohol needed for the entire reaction is used. The second esterification step is performed in a known manner with the addition of acid acceptors after the hydrogen halide that formed in the first esterification step has been removed.Type: GrantFiled: June 25, 1986Date of Patent: December 6, 1988Assignee: Huels Troisdorf AktiengesellschaftInventors: Hans-Joachim Kotzsch, Hans-Gunther Srebny, Hans-Joachim Vahlensieck
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Patent number: 4677215Abstract: Disclosed is a method for the production of silicon ester halides by the equilibration of chlorosilanes and silane esters. Organic phosphorous compounds are used as catalysts. These catalysts make it possible to obtain a virtually pure end product with a defined partial ester structure, and they reduce the formation of undesired by-products. The final distillation can also be performed in the presence of these catalysts without the occurrence of any disproportioning destruction of the reaction products.Type: GrantFiled: July 28, 1986Date of Patent: June 30, 1987Assignee: Dynamit Nobel AGInventors: Hans-Joachim Kotzsch, Hans-Joachim Vahlensieck