Patent ID: 9139506
Filing Date: 2015-09-22
Classification: C07C,C08G

Abstract:
1. A method for producing a hybrid polyester-polyether, comprising polymerizing at least one alkylene oxide in the presence of (1) a carboxylate initiator compound, (2) a double metal cyanide catalyst complex and (3) a Group 3-Group 15 metal or lanthanide series metal compound not present during the preparation of the double metal cyanide catalyst complex, in which Group 3-Group 15 metal or lanthanide series metal compound a Group 3-Group 15 metal or lanthanide series metal is bonded to at least one alkoxide, aryloxy, acyl, pyrophosphate, phosphate, thiophosphate, dithiophosphate, phosphate ester, thiophosphate ester, amide, siloxide, hydride, carbamate or hydrocarbon anion, and wherein the Group 3-Group 15 metal or lanthanide series metal compound is devoid of halide anions.