Patents Assigned to SynUthane International, Inc.
  • Double metal cyanide catalysts containing polyglycol ether complexing agents
    Patent number: 6642171
    Abstract: Double metal cyanide (“DMC”) complex catalysts comprise a double metal cyanide compound and a complexing agent such as an alkyl ether of a glycol, preferably of the formula R1O(CH2CHR2O)xH  (I) wherein: x is 1, 2, or 3; R1 is a C1-C4 alkyl group; and R2 is —H or a —CH3 group. Such catalysts have particular applicability in the production of low unsaturated polyols from epoxides.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: November 4, 2003
    Assignee: Synuthane International, Inc.
    Inventors: James M. O'Connor, Robin L. Grieve
  • Preparing polyether polyols with DMC catalysts
    Patent number: 6359101
    Abstract: A process for making polyether polyols employing a double metal cyanide (DMC) catalyst with specific low molecular weight polyether polyols as starters in combination with specific reaction conditions and impurity levels.
    Type: Grant
    Filed: December 15, 1999
    Date of Patent: March 19, 2002
    Assignee: SynUthane International, Inc.
    Inventors: James M. O'Connor, Donald L. Lickei, Robin L. Grieve