IP Library › Granted Patent US 8,278,239
Granted Patent B2
US 8,278,239 · App. 12/768,355 · Granted Oct 2, 2012

Polycarbonates made using highly selective catalysts

Assignee: Cornell Research Foundation, Inc.
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Quick Facts
Patent No.
US 8,278,239
App. No.
12/768,355
Granted
Oct 2, 2012
Kind
B2
Abstract

Poly(propylene carbonates) are prepared from propylene oxide and CO 2 with less than 10% cyclic propylene carbonate by product using cobalt based catalysts of structure preferably in combination with salt cocatalyst, very preferably cocatalyst where the cation is PPN + and the anion is Cl − or OBzF 5 − . Novel products include poly(propylene carbonates) having a stereoregularity greater than 90% and/or a regioregularity of greater than 90%.

Claims (1)

1. A compound of formula:

Assignments (2)
CONFIRMATORY LICENSE Recorded May 19, 2011
From: CORNELL UNIVERSITY
To: NATIONAL SCIENCE FOUNDATION
Reel/Frame 026305/0850 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 28, 2010
From: COATES, GEOFFREY W.; QIN, ZENGQUAN; COHEN, CLAIRE TOVA
To: CORNELL RESEARCH FOUNDATION, INC.
Reel/Frame 024303/0773 →
Continuity (4)
Division 11975800 · Oct 29, 2007
Division 11244231 · Oct 6, 2005
Provisional Application 60616630 · Oct 8, 2004
Related Publication 20100204437A1 · Aug 12, 2010