CATALYZED POLYMERIZATION OF CYCLIC ESTERS AND CYCLIC CARBONATES
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United States of America Patent
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Issued Date -
May 7, 2015
app pub date -
Nov 4, 2014
filing date -
Nov 5, 2013
priority date (Note) -
Abandoned
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Abstract
A process for the preparation of polyesters or polycarbonates including (i) the provision of cyclic esters or cyclic carbonates, (ii) polymerizing by ring-opening in the presence of a betaine based metal-free catalyst showing formula
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