Patents by Inventor Ulf Kehrer

Ulf Kehrer 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: 9040608
    Abstract: The present invention relates to a curable mixture suitable for obtaining “easy-to-clean” properties in the cured mixture, comprising at least one mineral binder, a powder comprising at least one fluoroorganyl-substituted silicon compound encapsulated in a water-soluble polymer, the amount of the silicon compound being 0.001% to 8% by weight, based on the present mixture, and optionally further adjuvants, and also to a process for preparing the mixture and to the use thereof. The invention further relates to a water-redispersible powder and also to a corresponding intermediate for use in the curable mixture in order to obtain “easy-to-clean” properties in the cured mixture. Also claimed, furthermore, is a process for preparing the powder, and the use thereof.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: May 26, 2015
    Assignees: Evonik Degussa GmbH, Akzo Nobel Chemicals International B.V.
    Inventors: Manuel Friedel, Philipp Albert, Burkhard Standke, Spomenko Ljesic, Ulf Kehrer
  • Patent number: 8497315
    Abstract: The present invention pertains to a process for the preparation of aqueous dispersions which are stabilized with a water-insoluble stabilizing colloid, characterized in that a) in a first step a water-insoluble stabilizing colloid is prepared, with this being prepared, based on the amount of monomer used for the preparation of the stabilizing colloid, by means of radical polymerization, followed by b) the addition of at least one further olefinically unsaturated monomer and at least one initiator, in which process by means of radical polymerization of the further olefinically unsaturated monomer an aqueous dispersion is obtained, on which c) optionally a residual monomer reduction is performed, with this being carried out by means of polymerization of residual monomers and/or by means of physical removal of the residual monomers and optionally further volatile organic components by means of the introduction of vapor and/or gas.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: July 30, 2013
    Assignee: Akzo Nobel N.V.
    Inventors: Hongli Willimann, Jakob Wolfisberg, Ulf Kehrer
  • Patent number: 8461247
    Abstract: The invention relates to an aqueous dispersion and dispersion powder composition for highly flexible, waterproof, hydraulically binding tile adhesives having an extended open time, and containing an emulsion polymer (A) having a glass transition temperature (Tg) of approximately 10° C. to 80° C., and an emulsion polymer (B) having a glass transition temperature (Tg) of approximately ?60° C. to +20° C. The difference of the glass transition temperatures (Tg) of the emulsion polymers (A and B) is at least approximately 5° C. The proportion of vinyl acetate monomer units is 0 to 70 mol-% and the minimum film forming temperature according to DIN 53787 of the 50% aqueous dispersion composition is approximately 15° C. or less, and the monomers, stabilization systems and optionally the additional additives of the dispersion and/or dispersion powder composition are selected such that a good cement compatibility is guaranteed.
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: June 11, 2013
    Assignee: Akzo Nobel N.V.
    Inventors: Hongli Willimann, Hans Wicki, Ulf Kehrer
  • Patent number: 8431646
    Abstract: The present invention relates to the use of a mixture that is dispersible, redispersible, or soluble in water, or an aqueous composition for protecting substrates from corrosion, wherein the mixture, or the composition, is based on at least one organic polymer that is soluble in water and at least one organosilicon compound. The invention further relates to a mixture that is dispersible, redispersible, or soluble in water, based on at least one organic polymer that is soluble in water and at least one organosilicon compound having at least one Si—O—Si bond and/or at least one Si—Si bond, wherein either the content of the organic polymer soluble in water, based on the sum of the organic polymer soluble in water and of the organosilicon compound, is between about 40 and about 80 wt.-%, or the organosilicon compound is an oligomer mixture of alkyl alkoxy siloxanes, wherein the oligomer mixture contains 50 to 100 wt.-% of alkyl alkoxy siloxanes, and the same have a degree of oligomerization of 2 to 20.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: April 30, 2013
    Assignees: Evonik Degussa GmbH, Akzo Nobel N.V.
    Inventors: Sabine Giessler-Blank, Burkhard Standke, Ulf Kehrer
  • Publication number: 20130085210
    Abstract: The present invention relates to a curable mixture suitable for obtaining “easy-to-clean” properties in the cured mixture, comprising at least one mineral binder, a powder comprising at least one fluoroorganyl-substituted silicon compound encapsulated in a water-soluble polymer, the amount of the silicon compound being 0.001% to 8% by weight, based on the present mixture, and optionally further adjuvants, and also to a process for preparing the mixture and to the use thereof. The invention further relates to a water-redispersible powder and also to a corresponding intermediate for use in the curable mixture in order to obtain “easy-to-clean” properties in the cured mixture. Also claimed, furthermore, is a process for preparing the powder, and the use thereof.
    Type: Application
    Filed: March 30, 2011
    Publication date: April 4, 2013
    Applicants: Akzo Nobel Chemicals International B.V., Evonik Degussa GmbH
    Inventors: Manuel Friedel, Philipp Albert, Burkhard Standke, Spomenko Ljesic, Ulf Kehrer
  • Publication number: 20100119851
    Abstract: The present invention relates to the use of a mixture that is dispersible, redispersible, or soluble in water, or an aqueous composition for protecting substrates from corrosion, wherein the mixture, or the composition, is based on at least one organic polymer that is soluble in water and at least one organosilicon compound. The invention further relates to a mixture that is dispersible, redispersible, or soluble in water, based on at least one organic polymer that is soluble in water and at least one organosilicon compound having at least one Si—O—Si bond and/or at least one Si—Si bond, wherein either the content of the organic polymer soluble in water, based on the sum of the organic polymer soluble in water and of the organosilicon compound, is between about 40 and about 80 wt.-%, or the organosilicon compound is an oligomer mixture of alkyl alkoxy siloxanes, wherein the oligomer mixture contains 50 to 100 wt.-% of alkyl alkoxy siloxanes, and the same have a degree of oligomerization of 2 to 20.
    Type: Application
    Filed: March 7, 2008
    Publication date: May 13, 2010
    Applicants: Evonik Degussa GmbH, Akzo Nobel N.V.
    Inventors: Sabine Giessler-Blank, Burkhard Standke, Ulf Kehrer
  • Publication number: 20100081736
    Abstract: The present invention pertains to a process for the preparation of aqueous dispersions which are stabilised with a water-insoluble stabilising colloid, characterised in that a) in a first step a water-insoluble stabilising colloid is prepared, with this being prepared, based on the amount of monomer used for the preparation of the stabilising colloid, by means of radical polymerization of a1) about 1 to 90 wt. % of at least one olefinically unsaturated monomer, containing at least one sulfate and/or sulfonate group, which optionally may be protonated, a2) about 5 to 99 wt. % of at least one olefinically unsaturated monomer with a water solubility at 20° C. of less than 50 g/l, and a3) up to 50 wt. % of at least one olefinically unsaturated monomer with a water solubility at 20° C.
    Type: Application
    Filed: November 15, 2007
    Publication date: April 1, 2010
    Inventors: Hongli Willimann, Jakob Wolfisberg, Ulf Kehrer
  • Publication number: 20090192242
    Abstract: The invention relates to an aqueous dispersion and dispersion powder composition for highly flexible, waterproof, hydraulically binding tile adhesives having an extended open time, and containing an emulsion polymer (A) having a glass transition temperature (Tg) of approximately 10° C. to 80° C., and an emulsion polymer (B) having a glass transition temperature (Tg) of approximately ?60° C. to +20° C. The difference of the glass transition temperatures (Tg) of the emulsion polymers (A and B) is at least approximately 5° C. The proportion of vinyl acetate monomer units is 0 to 70 mol-% and the minimum film forming temperature according to DIN 53787 of the 50% aqueous dispersion composition is approximately 15° C. or less, and the monomers, stabilization systems and optionally the additional additives of the dispersion and/or dispersion powder composition are selected such that a good cement compatibility is guaranteed.
    Type: Application
    Filed: March 13, 2006
    Publication date: July 30, 2009
    Applicant: National Starch and Chemical Investment Holding Corporation
    Inventors: Hongli Willimann, Hans Wicki, Ulf Kehrer