| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide copolymerization of propylene oxide and carbon dioxide and homopolymerization of propylene oxide. <P>SOLUTION: Copolymers of propylene oxide and carbon dioxide and homopolymers of propylene oxide are made using a two-dimensional double metal cyanide complex having the formula Co[M(CN)<SB POS="POST">4</SB>] or hydrated or partially dehydrated form thereof. Propylene carbonate is not formed as a by-product of the copolymerization. This invention provides a method for non-alternating copolymerization of rac-propylene oxide or enantomerically enriched propylene oxide and carbon dioxide. The method includes a step for polymerizing carbon dioxide and rac-propylene oxide or enantomerically enriched propylene oxide in the presence of a catalytically effective amount of a double metal cyanide complex containing a tetracyanometallate moiety. <P>COPYRIGHT: (C)2013,JPO&INPIT |
