Patents by Inventor Gu Arend

Gu Arend 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).

  • Rapidly crystallizing polyurethane systems
    Patent number: 5115073
    Abstract: The present invention is directed to a polyurethane system containing isocyanate groups prepared by reactingA) 70 to 98 parts by weight of at least one polyester diol having a melting point of 30.degree. C. to 60.degree. C. and a molecular weight of 800 to 8,000,B) 2 to 30 parts by weight of at least one polyester diol having a melting point of 65.degree. C. to 150.degree. C. and a molecular weight of 600 to 8,000, andC) no more than 1 mole of a diol having a molecular weight of less than 600 per moles of A) plus B), with,D) at least one organic polyisocyanate, the ratio of isocyanate groups to hydroxyl groups is between 3:1 and 1.2:1.
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: May 19, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Meckel, Eduard Hansel, Gu Arend, Klaus Konig