Patents by Inventor Lothar Backer

Lothar Backer 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: 7420077
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate diols by transesterifying dimethyl carbonate (DMC) with aliphatic diols.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: September 2, 2008
    Assignee: Bayer MaterialScience AG
    Inventors: Steffen Hofacker, Rolf Bachmann, Lothar Bäcker, Herbert Witossek
  • Patent number: 7317121
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate polyols by transesterifying dimethyl carbonate (DMC) with an aliphatic polyol component.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: January 8, 2008
    Assignee: Bayer MaterialScience AG
    Inventors: Steffen Hofacker, Herbert Witossek, Lothar Bäcker
  • Publication number: 20070219388
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate diols by transesterifying dimethyl carbonate (DMC) with aliphatic diols.
    Type: Application
    Filed: May 21, 2007
    Publication date: September 20, 2007
    Inventors: Steffen Hofacker, Rolf Bachmann, Lothar Backer, Herbert Witossek
  • Patent number: 7238825
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate diols by transesterifying dimethyl carbonate (DMC) with aliphatic diols.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: July 3, 2007
    Assignee: Bayer MaterialScience AG
    Inventors: Steffen Hofacker, Rolf Bachmann, Lothar Bäcker, Herbert Witossek
  • Publication number: 20050065360
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate diols by transesterifying dimethyl carbonate (DMC) with aliphatic diols.
    Type: Application
    Filed: September 15, 2004
    Publication date: March 24, 2005
    Inventors: Steffen Hofacker, Rolf Bachmann, Lothar Backer, Herbert Witossek
  • Publication number: 20050065359
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate polyols by transesterifying dimethyl carbonate (DMC) with an aliphatic polyol component.
    Type: Application
    Filed: September 15, 2004
    Publication date: March 24, 2005
    Inventors: Steffen Hofacker, Herbert Witossek, Lothar Backer
  • Patent number: 6319981
    Abstract: The present invention relates to coating compounds of which the binder consists essentially of a combination of a) a polyol component dissolved and/or dispersed in water or a water/solvent mixture, and b) a polyisocyanate component emulsified in the solution and/or dispersion of the polyol component with a viscosity at 23° C. of 50 to 10,000 mPa.s, in quantities corresponding to an equivalent ratio of isocyanate groups of component a) to alcoholic hydroxyl groups of component b) of 0.5:1 to 5:1, characterized in that component consists essentially of a1) a water-dilutable, hydroxyfunctional polycondensate resin free from urethane and sulfonate groups and having a molecular weight Mn above 500 or a2) a mixture of such a polycondensation resin with up to 100% by weight, based on the weight of the polycondensation resin, of at least one water-dilutable, hydroxyfunctional polymerization resin having a molecular weight Mn above 500.
    Type: Grant
    Filed: April 13, 1994
    Date of Patent: November 20, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Knud Reuter, Lothar Bäcker, Joachim Probst, Werner Kubitza, Rainer Rettig
  • Patent number: 5304400
    Abstract: The present invention relates to a process for preparing a coated, heat resistant substrate byI) coating the substrate with a coating composition containinga) a solution or dispersion containinga1) 100 parts by weight of at least one hydroxyl-functional polyacrylate resin in dissolved or dispersed form, wherein the resin has a hydroxyl value of 15 to 200 mg KOH/G solid resin, an acid value of 5 to 250 mg KOH/G solid resin and a total content of chemically incorporated carboxylate and/or sulfonate groups of 8 to 450 milliequivalents per 100 g of solids,a2) 25 to 395 parts by weight of water anda3) 5 to 125 parts by weight of at least one organic solvent having a boiling point or boiling range at 1013 mbar of 100 to 300.degree. C. andb) at least one organic polyisocyanate in a quantity corresponding to an equivalent ratio of isocyanate groups of component b) to isocyanate-reactive groups of component a1) of 0.
    Type: Grant
    Filed: January 15, 1992
    Date of Patent: April 19, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Knud Reuter, Burkhard Kohler, Rainer Rettig, Lothar Backer
  • Patent number: 5190932
    Abstract: The invention relates to the use of water-soluble polymers containing chemically bonded tertiary and/or quaternary ammonium groups as auxiliaries for formulating microbicides, the microbicide formulations prepared using these water-soluble polymers and the use of these formulations for preserving industrial materials.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: March 2, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Lothar Backer, Otto Exner, Walter Radt, Ingrid Radt, Christian Radt, Hans G. Schmitt
  • Patent number: 5089342
    Abstract: An improved aqueous coating agent for providing a decorative and protective coating for wood or wood products contains as a binder polyacrylate resins having chemically incorporated therein air-drying, unsaturated fatty acid moieties and quaternary ammonium moieties, and said agent is prepared by reactingA) excess polyacrylates containing epoxide groups and having an epoxide group equivalent weight of 200 to 1,300 withB) drying fatty acids, in an addition reaction with ester formation,C) reacting at least some of the remaining epoxide groups in the A)-B) reaction product with monoamine ammonium salts which contain an N-H bond in an addition reaction, anddissolving the reaction product obtained from step C) and containing quaternary ammonium groups in water.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: February 18, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Thomas Scholl, Wolfgang Wellner, Lothar Backer
  • Patent number: 4456729
    Abstract: By adding reaction products of from 4- to 6-hydric alcohols and dicarboxylic acid anhydrides, it is possible to render originally water-insoluble polyesters dilutable with water. Stoving lacquers based on such systems give highly weather-resistant lacquer films.
    Type: Grant
    Filed: December 10, 1982
    Date of Patent: June 26, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Lothar Backer, Jochen Schoeps
  • Patent number: 4418174
    Abstract: Dianhydromannitol, dianhydrosorbitol, dianhydromannitol semi-esters and dianhydrosorbitol semi-esters are outstanding raw materials for the production of aqueous stoving lacquers based on polyesters.
    Type: Grant
    Filed: April 8, 1982
    Date of Patent: November 29, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Lothar Backer, Jochen Schoeps