Patents Represented by Attorney E. Eugune Innis

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  • Polyurethane compositions having low hysteresis
    Patent number: 4507459
    Abstract: This invention pertains to the synthesis of polyurethane systems having low hysteresis. The systems are generated by reacting a prepolymer of a mononuclear diisocyanate and a polyol with a chain extender mix of a mononuclear aromatic diamine and a polyol. The prepolymer should have a free isocyanate content of from 2 to about 12% by weight and the chain extender mix should have an amine to polyol equivalent from about 0.5 to 5:1.
    Type: Grant
    Filed: February 8, 1984
    Date of Patent: March 26, 1985
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Andreas R. Schmidt, Herbert F. Strohmayer, Walter Sibral, Barton Milligan