US2012093706A1PendingUtilityA1

Copolymerization of propylene oxide and carbon dioxide and homopolymerization of propylene oxide

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Assignee: COATES GEOFFREY WPriority: Aug 24, 2006Filed: Dec 7, 2011Published: Apr 19, 2012
Est. expiryAug 24, 2026(~0.1 yrs left)· nominal 20-yr term from priority
Inventors:Geoffrey W. CoatesStephen LeeZengquan QinNicolas J. Robertson
C08G 64/0208C01C 3/08C08G 64/34C08G 65/2603C08G 65/2663
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Claims

Abstract

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.

Claims

exact text as granted — not AI-modified
1 - 11 . (canceled) 
     
     
         12 . A method of preparing Co[M(CN) 4 ] comprising reacting Co(SO 4 ) and K 2 [M(CN) 4 ] to form hydrated Co[M(CN) 4 ] to produce anhydrous Co[M(CN) 4 ] where M is selected from the group consisting of Ni, Pt and Pd. 
     
     
         13 . A method of preparing anhydrous Co[Ni(CN) 4 ] comprising the step of dehydrating microcrystalline Co(H 2 O) 2 [Ni(CN) 4 ].4H 2 O. 
     
     
         14 . Co[Pt(CN) 4 ]. 
     
     
         15 . Co[Pd(CN) 4 ]. 
     
     
         16 - 17 . (canceled)

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