Patents Assigned to Thüringen GmbH
  • Rubber-based soundproofing material
    Patent number: 6790894
    Abstract: A rubber-based soundproofing material comprises a mixture of a rubber blend, a metal or its oxides, alloys or salts, and conventional mixing ingredients. The mixture is either a non-blended chlorobutyl rubber, bromobutyl rubber or acrylate rubber, or a blend of nitrile rubber or styrene-butadiene rubber with epoxidized natural rubber. The mixture has the following proportions: 10-15% by wt. rubber or rubber blend, 85-40% by wt. metal or its oxides, alloys or salts, and 5-10 wt. % mixing ingredients.
    Type: Grant
    Filed: June 5, 2002
    Date of Patent: September 14, 2004
    Assignee: Thüringen GmbH
    Inventors: Frank Albracht, Gerd Lotze, Karl-Heinz Krause, Gerhard Merkmann, Wolfgang Timm