Patents Assigned to Lim International S.A.
  • Reinforced polyurethane tires
    Patent number: 4519432
    Abstract: This invention relates to reinforced tire utilizing polyurea or polyurethane formulations having low hysteresis. The polymer having low hysteresis is formed by reacting a prepolymer of an aromatic isocyanate and a high molecular weight difunctional polyol with a chain extender mix comprising an aromatic diamine and difunctional polyol. In these compositions the aromatic diisocyanate and aromatic diamine are selected so that there is substantial symmetry between the molecules. The reinforcement used is preferably an aromatic polyamide.
    Type: Grant
    Filed: February 8, 1984
    Date of Patent: May 28, 1985
    Assignee: Lim International S.A.
    Inventors: Andreas R. Schmidt, Herbert F. Strohmayer, Walter Sibral, Barton Milligan