Patents Assigned to Bayer Aktiengesellschift
  • Polycarbonate diols, their preparation and use as starting products for polyurethane plastics
    Patent number: 5621065
    Abstract: This invention relates to novel polycarbonates having hydroxyl end groups and an average molecular weight of 500 to 12,000, as determined by measuring the OH number, and being based on dimer diols containing either 36 or 44 carbon atoms. These novel polycarbonates are particularly suitable for the use in a process for the production of polyurethane plastics which are stable to hydrolysis and oxidation.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: April 15, 1997
    Assignee: Bayer Aktiengesellschift
    Inventors: Heinz Pudleiner, Hans-Georg Hoppe, Klaus K onig