Patents by Inventor Erhardt Reich

Erhardt Reich 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).

  • Manufacture of light-stable polyurethane integral foams
    Patent number: 4256841
    Abstract: To prepare light-stable polyurethane integral skin foams, especially soft integral foams, aliphatic and/or cycloaliphatic polyisocyanates, both categories preferably containing urethane groups and/or biuret groups, are reacted with polyols in the presence of blowing agents and of a synergistic catalyst combination comprising an alkali metal hydroxide, alkali metal alcoholate, alkali metal phenolate, alkali metal salt of a weak acid and/or hexahydrotriazine derivative and an organic tin, zinc and/or iron(II) compound, in the presence or absence of assistants and adjuvants.The preferred catalyst combination is tri-(dimethylaminopropyl)-s-hexahydrotriazine and dibutyl-tin dilaurate.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: March 17, 1981
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Horacek, Ernst Schoen, Erhardt Reich, Otto Volkert