Patents by Inventor Uwe Diener
Uwe Diener 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: 20130236265Abstract: The invention relates to a self-locking nut (10) having an internal thread (12) with a core hole which has one or a plurality of regions (14) having a reduced internal diameter.Type: ApplicationFiled: November 24, 2011Publication date: September 12, 2013Applicant: RUIA GLOBAL FASTENERS AGInventors: Frank-Uwe Diener, Wolfgang Giraud, Siegfried Oberndorfer, Thorsten Schraer
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Patent number: 8399093Abstract: Provided is a process for preparing surface-modified silicon dioxide particles with a mean particle diameter of at most 100 nm, involving (A) high-pressure grinding of a predispersion having (i) surface-modified silicon dioxide particles which are at least partly aggregated, are bonded to the surface-modifying component via Si—O—Si bonds, and still have reactive groups on their surface; (ii) an organosilicon compound which has a silicon-carbon bond and a functional group which can react with the reactive groups to form a covalent Si—O—Si bond; and (iii) a solvent, to form a dispersion; and (B) removing the liquid phase of the dispersion. Also provided are redispersible, surface-modified silicon dioxide particles obtained by this process, and their use in toner powders, silicone rubber, adhesives, and scratch-resistance surface coatings.Type: GrantFiled: June 2, 2009Date of Patent: March 19, 2013Assignee: Evonik Degussa GmbHInventors: Wolfgang Lortz, Gabriele Perlet, Uwe Diener, Sascha Reitz
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Patent number: 8377193Abstract: Aqueous dispersion which comprises hydrophobized silicon dioxide particles and in each case one or more dispersing additives, a basic composition, and which is free of color pigments, inactive fillers and binders, in which the hydrophobized silicon dioxide particles have a methanol wettability of 30 to 60 and are present in the dispersion with a proportion of 0.Type: GrantFiled: March 5, 2009Date of Patent: February 19, 2013Assignee: Evonik Degussa GmbHInventors: Wolfgang Lortz, Gabriele Perlet, Uwe Diener, Sascha Reitz
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Patent number: 8313703Abstract: Reactor for carrying out chemical and physical materials transformations, which comprises a reaction space enclosed by a reactor housing, where the reactor housing has at least two lateral fluid inlets having adjustably mounted nozzles which include an angle of about 20-160 degrees and through which fluid jets which impinge on one another at a common collision point within the reaction space are passed and the reactor has a fluid outlet at the bottom of the reaction space, which is characterized in that—an exchangeable bottom plate•which has a hole as fluid outlet and•on which moveably supported spheres are located so as to block the original path of the individual fluid jets in the unaligned state rests on the bottom of the reaction space and—a half shell standing upright on the bottom of the reaction space is located between each moveably supported sphere and the wall of the reactor space and—bottom plate, half shell and moveably supported spheres comprise one or more hard materials.Type: GrantFiled: March 5, 2009Date of Patent: November 20, 2012Assignee: Evonik Degussa GmbHInventors: Wolfgang Lortz, Karlheinz Filz, Werner Will, Uwe Diener
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Patent number: 8062622Abstract: A crystalline titanium dioxide powder, containing aggregated primary particles, wherein a BET surface area of the aggregated primary particles is from 30 to 65 m2/g, and a rutile content of a sum of crystalline modifications in the crystalline titanium dioxide is from of 50-70%.Type: GrantFiled: December 10, 2009Date of Patent: November 22, 2011Assignee: Evonik Degussa GmbHInventors: Christian Schulze-Isfort, Oswin Klotz, Rainer Golchert, Uwe Diener, Kai Schumacher
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Publication number: 20110123806Abstract: Process for preparing a dispersion of surface-modified silicon dioxide particles having an average particle diameter of not more than 100 nm by high-pressure milling of a preliminary dispersion comprising a) 10% to 50% by weight of surface-modified silicon dioxide particles, b) at least one glycol monoether of the general formula (A): H3C(CH2)m—O—(CH2)n—[O—(CH2)o]p—OH, c) at least one carboxylic ester of the general formula (B): H2x+1Cx—O—CH2—(CHR)—[O—CHR]y—O—C(?O)—CzH2z+1, d) the molar ratio A/B being 10:90 to 40:60 and m, n, o, p, x, y and z being independent of one another. Dispersion obtainable by this process. Process for producing granules of surface-modified silicon dioxide particles by separating off the liquid phase of the dispersion. Granules obtainable by this process. Use of dispersion and granules in coating materials.Type: ApplicationFiled: June 3, 2009Publication date: May 26, 2011Applicant: EVONIK DEGUSSA GMBHInventors: Wolfgang Lortz, Gabriele Perlet, Uwe Diener, Sascha Reitz
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Publication number: 20110086958Abstract: Process for preparing surface-modified silicon dioxide particles with a mean particle diameter of at most 100 nm, comprising the steps of: a) providing a predispersion b) high-pressure grinding of the predispersion to form a dispersion c) removing the liquid phase of the dispersion, the predispersion comprising a1) surface-modified silicon dioxide particles which are at least partly aggregated, are bonded to the surface-modifying component via Si—O—Si bonds and still have reactive groups on their surface, a2) one or more organosilicon compounds which have at least one silicon-carbon bond and at least one functional group which can react with the reactive groups to form a covalent Si—O—Si bond, and a3) one or more solvents. Redispersible, surface-modified silicon dioxide particles obtainable by this process. Use of these in toner powders, silicone rubber, adhesives and scratch-resistance surface coatings.Type: ApplicationFiled: June 2, 2009Publication date: April 14, 2011Applicant: EVONIK DEGUSSA GmbHInventors: Wolfgang Lortz, Gabriele Perlet, Uwe Diener, Sascha Reitz
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Publication number: 20110015281Abstract: Reactor for carrying out chemical and physical materials transformations, which comprises a reaction space enclosed by a reactor housing, where the reactor housing has at least two lateral fluid inlets having adjustably mounted nozzles which include an angle of about 20-160 degrees and through which fluid jets which impinge on one another at a common collision point within the reaction space are passed and the reactor has a fluid outlet at the bottom of the reaction space, which is characterized in that—an exchangeable bottom plate•which has a hole as fluid outlet and•on which moveably supported spheres are located so as to block the original path of the individual fluid jets in the unaligned state rests on the bottom of the reaction space and—a half shell standing upright on the bottom of the reaction space is located between each moveably supported sphere and the wall of the reactor space and—bottom plate, half shell and moveably supported spheres comprise one or more hard materials.Type: ApplicationFiled: March 5, 2009Publication date: January 20, 2011Applicant: Evonik Degussa GmbHInventors: Wolfgang Lortz, Karlheinz Filz, Werner Will, Uwe Diener
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Publication number: 20110000397Abstract: Aqueous dispersion which comprises hydrophobized silicon dioxide particles and in each case one or more dispersing additives, a basic composition, and which is free of colour pigments, inactive fillers and binders, in which the hydrophobized silicon dioxide particles have a methanol wettability of 30 to 60 and are present in the dispersion with a proportion of 0.Type: ApplicationFiled: March 5, 2009Publication date: January 6, 2011Applicant: EVONIK DEGUSSA GmbHInventors: Wolfgang Lortz, Gabriele Perlet, Uwe Diener, Sascha Reitz
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Publication number: 20100150819Abstract: A crystalline titanium dioxide powder, containing aggregated primary particles, wherein a BET surface area of the aggregated primary particles is from 30 to 65 m2/g, and a rutile content of a sum of crystalline modifications in the crystalline titanium dioxide is from of 50-70%.Type: ApplicationFiled: December 10, 2009Publication date: June 17, 2010Applicant: EVONIK DEGUSSA GmbHInventors: Christian Schulze-Isfort, Oswin Klotz, Rainer Golchert, Uwe Diener, Kai Schumacher
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Publication number: 20080292539Abstract: A crystalline titanium dioxide powder, containing aggregated primary particles, wherein a BET surface area of the aggregated primary particles is from 30 to 65 m2/g, and a rutile content of a sum of crystalline modifications in the crystalline titanium dioxide is from of 50-70%.Type: ApplicationFiled: May 22, 2008Publication date: November 27, 2008Applicant: EVONIK DEGUSSA GmbHInventors: Christian Schulze-Isfort, Oswin Klotz, Rainer Golchert, Uwe Diener, Kai Schumacher
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Patent number: 7439298Abstract: Pyrogenically produced silicon dioxide powder in the form of aggregates of primary particles having a BET surface area of 150±15 m2/g, wherein the aggregates display an average surface area of 12000 to 20000 nm2, an average equivalent circle diameter (ECD) of 90 to 120 nm and an average circumference of 1150 to 1700 nm. It is produced by a pyrogenic process in which silicon tetrachloride and a second silicon component comprising H3SiCl, H2SiCl2, HSiCl3, CH3SiCl3, (CH3)2SiCl2, (CH3)3SiCl and/or (n-C3H7)SiCl3 are mixed with primary air and a combustion gas and burnt into a reaction chamber, secondary air also being introduced into the reaction chamber, and the feed materials being chosen such that an adiabatic flame temperature of 1670 to 1730° C. is obtained. Silicone sealing compound containing the pyrogenically produced silicon dioxide powder.Type: GrantFiled: March 21, 2005Date of Patent: October 21, 2008Assignee: Degussa AGInventors: Kai Schumacher, Dieter Kerner, Uwe Diener, Mario Scholz
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Patent number: 7416600Abstract: Silicon-titanium mixed oxide powder produced by flame hydrolysis, which consists of aggregates of primary particles, with a BET surface area of 90±15 m2/g, a titanium dioxide proportion of 50±8 wt. % and an anatase/rutile ratio of 60:40 to 70:30. It is produced in that a mixture of silicon halide, titanium halide, hydrogen and primary air is ignited in a burner and the flame is burned into a reaction chamber closed off from the surrounding air, and secondary air and a gas, which increases the temperature in the reaction chamber by combustion and/or which slows down the cooling in the reaction chamber because of low heat transfer, are additionally introduced into the reaction chamber. It can be used in toner compositions.Type: GrantFiled: April 21, 2005Date of Patent: August 26, 2008Assignee: Degussa AGInventors: Kai Schumacher, Martin Moerters, Uwe Diener, Oswin Klotz
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Patent number: 7306667Abstract: A silicon-titanium mixed oxide powder contains aggregates of primary particles selected from amorphous silicon dioxide particles, crystalline titanium dioxide particles, and silicon-titanium mixed oxide particles each having an amorphous silicon dioxide fraction and a crystalline titanium dioxide fraction. The silicon-titanium mixed oxide particles predominate in the powder. The powder exhibits a BET surface area of from 20 to 200 m2/g, and a titanium dioxide content in a range of from greater than 10 wt. % to less than 70 wt. %. An X-ray diffractogram of the powder exhibits the diffraction patterns of rutile and anatase, with a rutile/anatase ratio of from 2:98 to 98:2. The powder can be produced by vaporizing a silicon halide and a titanium halide at temperatures of less than 180° C.Type: GrantFiled: January 7, 2005Date of Patent: December 11, 2007Assignee: Degussa AGInventors: Kai Schumacher, Martin Moerters, Oswin Klotz, Uwe Diener
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Publication number: 20070231280Abstract: Ternary, pyrogenically prepared, crystalline metal mixed oxide powder having the components titanium and silicon and a third component chosen from the group comprising aluminium, zirconium, zinc, tin, magnesium, yttrium, vanadium, tungsten, tantalum, cerium or boron. It is prepared by a procedure in which a vaporizable or atomizable silicon and titanium compound and a vaporizable or atomizable compound of a third mixed oxide component are mixed with hydrogen and primary air and the gas mixture is burned into a reaction chamber, and the powder formed is separated off from the gaseous reaction products. It can be employed in sunscreen formulations.Type: ApplicationFiled: April 19, 2005Publication date: October 4, 2007Applicant: Degussa AGInventors: Kai Schumacher, Rainer Golchert, Oswin Klotz, Uwe Diener, Steffen Hasenzahl
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Publication number: 20070186816Abstract: Silicon-titanium mixed oxide powder produced by flame hydrolysis, which consists of aggregates of primary particles, with a BET surface area of 90 15 m²/g, a titanium dioxide proportion of 50 8 wt. % and an anatase/rutile ratio of 60:40 to 70:30. It is produced in that a mixture of silicon halide, titanium halide, hydrogen and primary air is ignited in a burner and the flame is burned into a reaction chamber closed off from the surrounding air, and secondary air and a gas, which increases the temperature in the reaction chamber by combustion and/or which slows down the cooling in the reaction chamber because of low heat transfer, are additionally introduced into the reaction chamber It can be used in toner compositions.Type: ApplicationFiled: April 21, 2005Publication date: August 16, 2007Inventors: Kai Schumacher, Martin Moerters, Uwe Diener, Oswin Klotz
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Patent number: 7083769Abstract: Silicon-titanium mixed oxide powder prepared by flame hydrolysis, having a ratio by weight of silicon dioxide/titanium dioxide, which is greater on the surface of the primary particles than that within the total primary particle. It is prepared by a flame hydrolysis process, in that a stream consisting of a vaporous titanium dioxide precursor and oxygen or an oxygen-containing gas and hydrogen, and a second stream consisting of a vaporous silicon dioxide precursor and a carrier gas consisting of oxygen, an oxygen-containing gas and/or an inert gas, are guided separately into the reaction chamber of a burner such as is known for the preparation of pyrogenic oxides, and are burnt here, the solid mixed oxide powder and hot gases are subsequently cooled, and the gases are separated from the solid. The powder may be used, for example, for the preparation of sunscreen preparations.Type: GrantFiled: December 23, 2002Date of Patent: August 1, 2006Assignee: Degussa AGInventors: Martin Moerters, Ina Hemme, Steffen Hasenzahl, Uwe Diener, Herbert Habermann
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Publication number: 20060155042Abstract: Pyrogenically produced silicon dioxide powder in the form of aggregates of primary particles having a BET surface area of 150±15 m2/g, wherein the aggregates display an average surface area of 12000 to 20000 nm2, an average equivalent circle diameter (ECD) of 90 to 120 nm and an average circumference of 1150 to 1700 nm. It is produced by a pyrogenic process in which silicon tetrachloride and a second silicon component comprising H3SiCl, H2SiCl2, HSiCl3, CH3SiCl3, (CH3)2SiCl2, (CH3)3SiCl and/or (n-C3H7)SiCl3 are mixed with primary air and a combustion gas and burnt into a reaction chamber, secondary air also being introduced into the reaction chamber, and the feed materials being chosen such that an adiabatic flame temperature of 1670 to 1730° C. is obtained. Silicone sealing compound containing the pyrogenically produced silicon dioxide powder.Type: ApplicationFiled: March 21, 2005Publication date: July 13, 2006Applicant: Degussa AGInventors: Kai Schumacher, Dieter Kerner, Uwe Diener, Mario Scholz
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Publication number: 20050200064Abstract: The invention relates to a holding element for connecting a rod (1) to the body or the chassis of a vehicle using an elastic bearing (2). Said bearing consists of at least one outer sleeve and one inner sleeve (3, 4) provided with an elastic material (5), especially a rubber material, in the annular region (6) between the two sleeves. The outer sleeve (3) is fixed to the body or the chassis, and the inner sleeve (4) is connected to the rod (1) by means of a pin (7). Said pin extends through the inner sleeve (4) and carries a securing disk (9) on its free end, which secures the elastic bearing (2) against damaging offset in the event of defective adhesion of its individual parts in the axial direction. Furthermore, the securing disk extends in the radial direction at least to the outer sleeve (3) and at least part of its outer circumference is embodied in such a way that it is oriented in an essentially concave manner away from the elastic bearing (2).Type: ApplicationFiled: June 25, 2003Publication date: September 15, 2005Inventors: Norbert Klein, Frank-Uwe Diener
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Publication number: 20050183634Abstract: A silicon-titanium mixed oxide powder contains aggregates of primary particles selected from amorphous silicon dioxide particles, crystalline titanium dioxide particles, and silicon-titanium mixed oxide particles each having an amorphous silicon dioxide fraction and a crystalline titanium dioxide fraction. The silicon-titanium mixed oxide particles predominate in the powder. The powder exhibits a BET surface area of from 20 to 200 m2/g, and a titanium dioxide content in a range of from greater than 10 wt. % to less than 70 wt. %. An X-ray diffractogram of the powder exhibits the diffraction patterns of rutile and anatase, with a rutile/anatase ratio of from 2:98 to 98:2. The powder can be produced by vaporizing a silicon halide and a titanium halide at temperatures of less than 180° C.Type: ApplicationFiled: January 7, 2005Publication date: August 25, 2005Applicant: DEGUSSA AGInventors: Kai Schumacher, Martin Moerters, Oswin Klotz, Uwe Diener