Patents Assigned to Leuna Polymer GmbH
  • Patent number: 7988748
    Abstract: Mineral oil compositions with trace portions of additives contain as additive a comb polymer containing ester linkages, either based on a) ethylene-vinylester copolymers modified by hydroxy groups or glycidyl groups with molecular mass weight averages from 3000 to 50000 and an ethylene portion of 50 to 90 mass %, and b) partially imidated and/or partially esterified maleic anhydride copolymers, wherein in the comb polymer based on a) and b) the modified ethylene-vinylester copolymer component is connected by means of ester linkages to the partially imidated and/or partially esterified maleic anhydride copolymer component, or a comb polymer containing ester linkages based on c) ethylene-vinylester copolymers modified by acid and/or acid anhydride groups with molecular mass weight averages from 3000 to 50000 and an ethylene portion of 50 to 90 mass %, and d) polyalcohols partially esterified with C12-C40-monocarboxylic acids wherein in the comb polymer based on c) and d) the ethylene-vinylester copolymer c
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: August 2, 2011
    Assignee: Leuna Polymer GmbH
    Inventors: Hiltrud Täubert, Wolfgang Haubold, Konrad Bühler, Torsten Meyer
  • Patent number: 7776801
    Abstract: An additive mixture as component of a composition of mineral oil as main component and trace portions of an additive mixture containing the additive components a) ethylene-vinylester copolymers modified by polar groups with molecular mass weight averages from 3000 to 50000 and an ethylene component of 50 to 90 mass %, and b) C2-C6-oxyalkyl-bridged C12-C40-monocarboxylic acids, and/or c) partially and/or completely imidated copolymers of unsaturated C4-C20-dicarboxylic acid anhydrides and vinyl aromatics and/or C2-C36-?-olefins, whereby the content of the additive mixture in the mineral is 0.005 to 1 mass %. The compositions are suitable as flowable media to be transported at low temperatures and as mineral oil fuels with high lubricity and flowability.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: August 17, 2010
    Assignee: Leuna Polymer GmbH
    Inventors: Hiltrud Täubert, Wolfgang Haubold, Erhard Brauer, Torsten Meyer, Dietrich von der Wense