Patents by Inventor Robert G. Eiben

Robert G. Eiben 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).

  • Polyisocyanate based upon 4,4'-and 2,4'-diphenyl-methane dllsocyanates and use thereof in a rim process
    Patent number: 5585452
    Abstract: A novel polyisocyanate which is liquid and room temperature stable and has an isocyanate group content of from 10 to 30% by weight is prepared by reacting:a) an isocyanate mixture of 4,4'-diphenylmethane diisocyanate, 2,4'-diphenylmethane diisocyanate, and an amount of an isocyanate based upon diphenylmethane diisocyanate having an isocyanate functionality of more than 2, such that the total isocyanate mixture a) has an average isocyanate functionality of from 2.02 to 2.50, andb) one or more polyols selected from the group consisting of1) diols having molecular weights of from 1000 to 5000,2) triols having molecular weights of from 1000 to 6000, and3) mixtures thereof.When used in a RIM process, parts are produced which have excellent low temperature impact properties.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 17, 1996
    Assignee: Bayer Corporation
    Inventors: Michael F. Hurley, Robert G. Eiben
  • Rim process utilizing isocyanates based upon 2,4'- and 4,4'-diphenylmethane diisocyanate
    Patent number: 5563232
    Abstract: A RIM process utilizing a reaction product of an MDI containing from 6 to 50% by weight of the 2,4'-isomer and a polypropylene glycol as the isocyanate reactant results in a molded product having excellent low temperature impact properties.
    Type: Grant
    Filed: February 7, 1995
    Date of Patent: October 8, 1996
    Assignee: Bayer Corporation
    Inventors: Michael F. Hurley, Robert G. Eiben