Patents Assigned to BASF Schwarzheide
  • Preparation of cellular polyurethanes
    Patent number: 5578653
    Abstract: A process for the production of cellular polyurethanes by reactinga) at least one organic and/or modified organic polyisocyanate,b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, if desiredc) low-molecular-weight chain extenders and/or crosslinking agents,in the presence ofd) blowing agents,e) catalysts, and, if desired,f) auxiliaries and/or additives,wherein the blowing agent d) is at least one acetal.
    Type: Grant
    Filed: October 12, 1995
    Date of Patent: November 26, 1996
    Assignee: BASF Schwarzheide
    Inventors: Regina Hendreich, Peter Falke, Dieter Tintelnot, Marion Wenzel