Patents by Inventor Werner Will

Werner Will 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).

  • Patent number: 7374787
    Abstract: An aqueous dispersion, having a silicon dioxide powder having a silicon dioxide content of 10 to 60 wt.%, wherein the aqueous dispersion is stable in the pH range of 2 to 6, the aqueous dispersion additionally contains at least one compound, which is at least partially soluble in aqueous solution in the pH range 2 to 6 in the form of polyvalent cations, these being stable in a silicate-like environment as an anionic component of the particle surface of the silicon dioxide powder, the quantity of cation-providing compound in relation to the surface of the silicon dioxide is 0.001 to 0.1 mg cation-providing compound/m2 silicon dioxide surface, the cation-providing compound being calculated as the oxide, and the zeta potential of the aqueous dispersion has values of less than or equal to zero.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: May 20, 2008
    Assignee: Dequssa AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Gabriele Perlet, Werner Will, Gerrit Schneider, Peter Neugebauer
  • Publication number: 20080098932
    Abstract: Aqueous dispersion obtainable by placing in water an aggregated titanium dioxide powder having a specific surface area of from 20 to 150 m2/g in such an amount that the desired dispersion comprises at least 20 wt. % titanium dioxide, and at least onc amino alcohol having from 1 to 6 carbon atoms, and at least one carboxylic acid from the group comprising dibasic carboxylic acids and/or hydroxycarboxylic acids having from 2 to 6 carbon atoms,—the amino alcohol being present in the dispersion in an amount of from 2.5 to 7.0 ?mol./m2 specific surface area TiO2 and the carboxylic acid being present in an amount of from 1.0 to 3.5 ?mol./m specific surface area TiO2,—producing a pre-dispersion by introducing energy in an amount of less than 200 kJ/m3 and then producing a dispersion in which the aggregated titanium dioxide powder has a mean, volume-related aggregate diameter of less than 150 nm by grinding the pre-dispersion by means of a high-energy mill at a pressure of at least 500 bar.
    Type: Application
    Filed: July 5, 2005
    Publication date: May 1, 2008
    Applicant: DEGUSSA GmbH
    Inventors: Gabriele Perlet, Wolfgang Lortz, Christoph Batz-Sohn, Werner Will, Sascha Reitz
  • Publication number: 20070145327
    Abstract: Aqueous dispersion which comprises hydrophobized silicon dioxide powder with a content of between 5 and 50 wt. % and which comprises at least one compound of the general formula R & supl; —COO—(CH2-CH(Ph)—O)a-(CnH2n-xR2xO)b-R3 (I). It is prepared by dispersing the hydrophobic silicon dioxide powder, dispersing agent and optionally pH-regulating substances and further additives in an aqueous medium. It can be employed as an additive to waterborne fillers in the automobile industry, as a coating constituent in can and coil coating processes, as an additive in water-based UV-curable formulations e.g. for wood preservation and as a constituent of protective lacquer films.
    Type: Application
    Filed: March 26, 2004
    Publication date: June 28, 2007
    Applicants: Degussa AG, Goldschmidt GmbH
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Gabriele Perlet, Werner Will, Kathrin Lehmann, Angela Ruttgerodt
  • Publication number: 20060104881
    Abstract: Process for the production of an aqueous dispersion of pyrogenically produced metal oxide and metalloid oxide powders with a BET surface area of between 5 and 600 m2/g, with a metal oxide or metalloid oxide content in the dispersion of between 5 and 25 wt. %, comprising the following steps:—water, which is optionally adjusted to pH values of between 2 and 4 by adding acids, is circulated from a receiving vessel via a rotor/stator machine, and—metal oxide or metalloid oxide powder is introduced, using a feed device, into the shear zone between the slots in the rotor teeth and the stator slots, continuously or discontinuously and with the rotor/stator machine running, in a quantity such that a predispersion with a solids content of between 20 and 40 wt.
    Type: Application
    Filed: April 1, 2004
    Publication date: May 18, 2006
    Applicant: DEGUSSA AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Gabriele Perlet, Werner Will, Gerrit Schneider
  • Publication number: 20050224749
    Abstract: An aqueous dispersion containing pyrogenically prepared metal oxide particles and dispersants An aqueous dispersion containing pyrogenically prepared oxide particles of titanium, zinc, iron or cerium with an average particle size, expressed as the median, in the dispersion of less than 250 nm, that the particle sizes of the oxide particles in the dispersion are not distributed symmetrically and the dispersion contains, as a dispersant, at least one compound of the formula (I) and/or a maleic anhydride/acrylate copolymer of the general formula (IIa) and/or a maleate/acrylate copolymer of the general formula (IIb). It is prepared by dispersing a predispersion stream by means of a high energy mill. It can be used in sunscreen formulations.
    Type: Application
    Filed: May 14, 2003
    Publication date: October 13, 2005
    Applicants: DEGUSSA AG, GOLDSCHMIDT AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Steffen Hasenzahl, Gabriele Perlet, Werner Will, Ralf Mathiak, Klaus Jenni
  • Publication number: 20050169861
    Abstract: Aqueous dispersion containing pyrogenically produced oxide particles of titanium, zinc, iron or cerium having an average particle size, expressed as a median value, in the dispersion of less than 200 nm, the particle sizes of the oxide particles are not distributed symmetrically in the dispersion, the dispersion contains as dispersing agent at least one (poly)phosphate corresponding to the general formula I and has a pH of 4.5 to 7.5. It is prepared by dispersing a stream of a preliminary dispersion by means of a high-energy mill. It can be used in sunscreen formulations.
    Type: Application
    Filed: June 3, 2003
    Publication date: August 4, 2005
    Applicant: DEGUSSA AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Steffen Hasenzahl, Gabriele Perlet, Werner Will
  • Patent number: 6905632
    Abstract: An aqueous dispersion is used in the chemical mechanical polishing of surfaces, particularly oxidic surfaces, such as silicon dioxide. The aqueous dispersion contains a powder of pyrogenically produced silicon dioxide doped with 0.01 and 3 wt. % aluminium oxide, relative to the total amount of powder, said powder having an average particle diameter in the dispersion of not more than 0.1 ?m.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: June 14, 2005
    Assignee: Degussa AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Gabriele Perlet, Werner Will
  • Publication number: 20040106697
    Abstract: An aqueous dispersion, comprising: a silicon dioxide powder having a silicon dioxide content of 10 to 60 wt. %, wherein the aqueous dispersion is stable in the pH range of 2 to 6, the aqueous dispersion additionally contains at least one compound, which is at least partially soluble in aqueous solution in the pH range 2 to 6 in the form of polyvalent cations, these being stable in a silicate-like environment as an anionic component of the particle surface of the silicon dioxide powder, the quantity of cation-providing compound in relation to the surface of the silicon dioxide is 0.001 to 0.1 mg cation-providing compound/m2 silicon dioxide surface, the cation-providing compound being calculated as the oxide, and the zeta potential of the aqueous dispersion has values of less than or equal to zero.
    Type: Application
    Filed: August 21, 2003
    Publication date: June 3, 2004
    Applicant: DEGUSSA AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Gabriele Perlet, Werner Will, Gerrit Schneider, Peter Neugebauer
  • Patent number: 6676719
    Abstract: A pyrogenic process is used to prepare alkali-doped silica particles. Particles produced by this process exhibit homogeneous doping, reduced agglomeration, greater stability and higher removal rates. Aqueous dispersions containing alkali-doped pyrogenic silica with average particle size less than 100 nm are used for polishing surfaces (CMP).
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: January 13, 2004
    Assignee: Degussa AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Helmut Mangold, Gabriele Perlet, Werner Will
  • Patent number: 6663683
    Abstract: An aqueous dispersion containing a cerium oxide-doped, pyrogenically produced silicon dioxide, wherein the cerium oxide is introduced through an aerosol of a cerium salt solution or suspension and the average particle size in the dispersion is less than 100 nm. The dispersion is produced by dispersing the cerium oxide-doped, pyrogenically produced silicon dioxide in aqueous solution by means of a high energy input. The aqueous dispersion can be used for chemical-mechanical polishing.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: December 16, 2003
    Assignee: Degussa AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Gabriele Perlet, Werner Will
  • Publication number: 20030150838
    Abstract: An aqueous dispersion is used in the chemical mechanical polishing of surfaces, particularly oxidic surfaces, such as silicon dioxide. The aqueous dispersion contains a powder of pyrogenically produced silicon dioxide doped with 0.01 and 3 wt. % aluminium oxide, relative to the total amount of powder, said powder having an average particle diameter in the dispersion of not more than 0.1 &mgr;m.
    Type: Application
    Filed: January 31, 2003
    Publication date: August 14, 2003
    Applicant: DEGUSSA AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Gabriele Perlet, Werner Will
  • Patent number: 6465672
    Abstract: The invention relates to a process for the production of organosilylalkyl polysulfanes by reacting an organosilylalide alkyl halide and an anhydrous or virtually anhydrous ionic sulfide and elementary sulfur, wherein the elementary sulfur and organosilylalkyl halide are suspended in a polar organic solvent and the ionic sulfide is added to this suspension.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: October 15, 2002
    Assignee: Degussa AG
    Inventors: Rudolf Michel, Jorg Munzenberg, Werner Will, Gerd Rainhard Zezulka
  • Publication number: 20020134027
    Abstract: A pyrogenic process is used to prepare alkali-doped silica particles. Particles produced by this process exhibit homogeneous doping, reduced agglomeration, greater stability and higher removal rates. Aqueous dispersions containing alkali-doped pyrogenic silica with average particle size less than 100 nm are used for polishing surfaces (CMP).
    Type: Application
    Filed: December 21, 2001
    Publication date: September 26, 2002
    Applicant: DEGUSSA AG
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Helmut Mangold, Gabriele Perlet, Werner Will
  • Publication number: 20020095873
    Abstract: An aqueous dispersion containing a cerium oxide-doped, pyrogenically produced silicon dioxide, wherein the cerium oxide is introduced through an aerosol of a cerium salt solution or suspension and the average particle size in the dispersion is less than 100 nm. The dispersion is produced by dispersing the cerium oxide-doped, pyrogenically produced silicon dioxide in aqueous solution by means of a high energy input. The aqueous dispersion can be used for chemical-mechanical polishing.
    Type: Application
    Filed: November 1, 2001
    Publication date: July 25, 2002
    Inventors: Wolfgang Lortz, Christoph Batz-Sohn, Gabriele Perlet, Werner Will
  • Patent number: 6423859
    Abstract: The invention relates to a process for the preparation of organosilylalkylpolysulfanes, of the general formula I (R1R2R3SiR4)2Sx (I) by reaction of organosilylalkylpolysulfanes of the general formula II (R1R2R3SiR4)2Sy (II) with an ionic sulfide of the general formula M+2S2− (III) and an organosilylalkyl halide of the general formula R1R2R3SiR4X (IV), the long-chain organosilylalkylpolysulfane of the general formula (II) and the organosilylalkyl halide of the general formula (IV) being initially introduced into the reaction vessel and the ionic sulfide of the general formula (III) being added to this solution in several portions.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: July 23, 2002
    Assignee: Degussa AG
    Inventors: Alfred Alig, Christoph Batz-Sohn, Ulrich Deschler, Rudolf Michel, Jörg Münzenberg, Raymund Sonnenschein, Werner Will, Gerd Rainhard Zezulka, Karl-Heinz Rützel
  • Publication number: 20020049347
    Abstract: The invention relates to a process for the preparation of organosilylalkylpolysulfanes, of the general formula I (R1R2R3SiR4)2SX (I) by reaction of organosilylalkylpolysulfanes of the general formula II (R1R2R3SiR4)2Sy (II) with an ionic sulfide of the general formula M+2S2− (III) and an organosilylalkyl halide of the general formula R1R2R3SiR4X (IV), the long-chain organosilylalkylpolysulfane of the general formula (II) and the organosilylalkyl halide of the general formula (IV) being initially introduced into the reaction vessel and the ionic sulfide of the general formula (III) being added to this solution in several portions.
    Type: Application
    Filed: July 13, 2001
    Publication date: April 25, 2002
    Inventors: Alfred Alig, Christoph Batz-Sohn, Ulrich Deschler, Rudolf Michel, Jorg Munzenberg, Raymund Sonnenschein, Werner Will, Gerd Rainhard Zezulka, Karl-Heinz Rutzeil
  • Publication number: 20010037034
    Abstract: The invention relates to a process for the production of organosilylalkyl polysulfanes by reacting an organosilylalide alkyl halide and an anhydrous or virtually anhydrous ionic sulfide and elementary sulfur, wherein the elementary sulfur and organosilylalkyl halide are suspended in a polar organic solvent and the ionic sulfide is added to this suspension.
    Type: Application
    Filed: March 1, 2001
    Publication date: November 1, 2001
    Inventors: Rudolf Michel, Jorg Munzenberg, Werner Will, Gerd Rainhard Zezulka
  • Patent number: 5892085
    Abstract: The preparation of high-purity organosilicon disulphanes in which, in a two-stage process, elemental sulphur and an anhydrous alkali sulphide in a deficient amount is first reacted with a halogen alkylalkoxysilane, and the sulphur deficit is then made up by the addition of further alkali sulphide.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: April 6, 1999
    Assignee: Degussa Aktiengesellschaft
    Inventors: Jorg Munzenberg, Werner Will, Gerd Zezulka
  • Patent number: 5260470
    Abstract: A method of purifying alkoxysilanes contaminated by organosilicon compounds with hydrolyzable chlorine atoms is disclosed wherein the alkoxysilanes are reacted in a pressure reactor with an alcohol, preferably in the presence of an HCl acceptor, at a temperature of 5.degree. C. to 160.degree. C. above the boiling point of the alcohol used and at the pressure which develops in the reactor.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: November 9, 1993
    Assignee: Degussa Aktiengesellschaft
    Inventors: Thomas Goebel, Peter Panster, Werner Will, Peter Kleinschmit