Patents by Inventor Christian Leuschke

Christian Leuschke 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: 5260133
    Abstract: A UV-curable composition suitable for coating polycarbonate molded articles is disclosed. Accordingly the composition containsA) from 10 to 100% by weight of a polysiloxane which contains epoxy groups and is free from OH groups, and optionallyB) from 0 to 90% by weight of compounds other than A) which also contain epoxy groups and are free from OH groups, and/or optionallyC) from 0 to 40% by weight of compounds which are free from epoxy groups but contain hydroxyl groups, where components A)+B)+C) add up to 100% by weight, together withD) from 0.1 to 15% relative to the weight of A+B+C of photoinitiators and optionallyE) from 0 to 0.5% relative to the weight of A+B+C of sensitizers.In accordance with the invention , the composition is applied to the moldings of thermoplastic polycarbonates and then cured.
    Type: Grant
    Filed: July 16, 1992
    Date of Patent: November 9, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz-Dieter Brandt, Wolfgang Fischer, Christian Leuschke, Gerhard Kranz
  • Patent number: 5110895
    Abstract: Polyester and polyester carbonates corresponding to the following formula ##STR1## in which R.sup.1 to R.sup.4, o to r, n, a and b and also X.sup.1 and Y.sup.1 are as defined in the specification,may be obtained by interfacial condensation from bisphenols corresponding to the following formula. ##STR2## aromatic dicarboxylic acid chlorides corresponding to the following formula ##STR3## and phosgene. The new polyesters and polyester carbonates combine outstanding heat resistance and light stability. They may be used both as thermoplastic materials as such or as constituents of polymer blends or even as UV (light) stabilizers or as UV (light)-stabilizing coatings. Accordingly, they have degrees of polycondensation n in the range from 2 to 100.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: May 5, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Richard Weider, Dieter Arlt, Christian Leuschke, Thomas Scholl
  • Patent number: 5008148
    Abstract: This invention relates to a process for coating moulded plastic articles of thermoplastic polycarbonates or thermoplastic polyarylene sulphides with metal oxides, to the moulded plastic articles obtainable by the process according to the invention and to their technological application for outdoor use, for example for the production of coverings or facings in the building industry.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: April 16, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Siegfried Thurm, Reimer Holm, Christian Leuschke, Dietrich Rathmann, Lutz Schrader
  • Patent number: 4427809
    Abstract: Thermoplastic moulding compositions of co-graft polymers which are obtained by the polymerization of vinyl monomers, in particular by the polymerization of unsaturated esters, in the presence of mixtures consisting of the following:1. elastomers having glass transition temperatures .ltoreq.0.degree. C.,2. polyesters, polyethers, polyesterurethanes, polyurethanes, polycarbonates or mixtures thereof, and optionally3. cellulose esters of aliphatic C.sub.1 -C.sub.5 carboxylic acids,and moulding compositions consisting of mixtures of these co-graft polymers with organic cellulose esters.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: January 24, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinrich Alberts, Winfried Fischer, Christian Leuschke
  • Patent number: 4368292
    Abstract: The invention relates to thermoplastic moulding compositions consisting of a graft substrate composed of (a) a (meth)acrylic acid C.sub.1 -C.sub.18 -alkyl ester homo- or copolymer, and (b) of a cellulose ester of one or more aliphatic C.sub.1 -C.sub.5 carboxylic acids, and polymerized units of (2) vinyl esters and/or alkyl esters of acrylic and/or methacrylic acid and (3) of C.sub.2 -C.sub.4 -.alpha.-olefins, at least part of the (meth)acrylic acid ester polymer and of the cellulose ester being bridged together through polymerized units of the graft monomers.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: January 11, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinrich Alberts, Winfried Fischer, Christian Leuschke
  • Patent number: 4360635
    Abstract: Transparent thermoplastic moulding compositions having improved mechanical properties consist of graft copolymers or mixtures thereof with a cellulose ester of aliphatic C.sub.1 -C.sub.5 carboxylic acids, wherein the graft copolymers consist of an ethylene vinyl ester copolymer and a cellulose ester of aliphatic C.sub.1 -C.sub.5 -carboxylic acids as the graft substrate, at least part of which being bridged with polymerized grafted units of vinyl esters and/or alkyl esters of acrylic and/or methacrylic acid, and, optionally, C.sub.2 -C.sub.4 -olefins.
    Type: Grant
    Filed: December 12, 1980
    Date of Patent: November 23, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinrich Alberts, Winfried Fischer, Christian Leuschke, Herbert Bartl
  • Patent number: 4357267
    Abstract: Transparent thermoplastic moulding compositions having improved mechanical properties consist essentially of a cellulose ester of aliphatic C.sub.1 -C.sub.5 -carboxylic acids and a graft copolymer of an ethylene vinyl ester copolymer having grafted thereon polymerized units of vinyl esters and/or alkyl esters of acrylic and/or methacrylic acid and, optionally, C.sub.2 -C.sub.4 -olefins.
    Type: Grant
    Filed: December 11, 1980
    Date of Patent: November 2, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinrich Alberts, Winfried Fischer, Friedemann Muller, Horst Peters, Christian Leuschke, Hans-Peter Baasch