COPOLYMERIZATION OF PROPYLENE OXIDE AND CARBON DIOXIDE WITHOUT PRODUCTION OF PROPYLENE CARBONATE

摘要

Copolymers of propylene oxide and carbon dioxide and homopolymers of propylene oxide are made using two dimensional double metal cyanide complexes having the formula Co[M(CN)4] or hydrated or partially dehydrated form thereof. There is no propylene carbonate by product in the copolymerization.

主权项

1. A method for the non-alternating copolymerization of rac-propylene oxide or enantiomerically enriched propylene oxide and carbon dioxide to produce: without the formation of propylene carbonate; wherein where x ranges from 1.0 to 0.46 and Mn ranges from 500 to 500,000 g/mol, said method comprising the step of copolymerizing rac-propylene oxide or enantiomerically enriched propylene oxide and carbon dioxide in the presence of a catalytically effective amount of a double metal cyanide complex containing a tetracyanometallate moiety.