ORGANIC SYSTEM FOR THE RING-OPENING POLYMERIZATION OF CYCLIC CARBONATES IN ORDER TO OBTAIN (BIO)-POLYCARBONATES
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United States of America Patent
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Issued Date -
May 3, 2012
app pub date -
Mar 31, 2010
filing date -
Mar 31, 2009
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Abandoned
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Abstract
An organocatalytic system, having a sulfonic acid as catalyst, for the polymerization of carbonates, and a polymerization process employing said system to obtain bio-polycarbonates devoid of ether units inserted by decarboxylation. The catalyst system for the ring-opening polymerization reaction of cyclic carbonates is formed of an initiator and, as catalyst, of a sulfonic acid of formula R′—SO3H, where R′ denotes either:
- a linear alkyl group including from 1 to 20 carbon atoms or a branched or cyclic alkyl group including from 3 to 20 carbon atoms, ora an aryl group.
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