Title:
CATALYTIC DEPOLYMERIZATION OF POLYMERS CONTAINING ELECTROPHILIC LINKAGES USING NUCLEOPHILIC REAGENTS
Document Type and Number:
WIPO Patent Application WO2004060987
Kind Code:
A3
Abstract:
A method is provided for carrying out depolymerization of a polymer containing electrophilic linkages in the presence of a catalyst and a nucleophilic reagent, wherein production of undesirable byproducts resulting from polymer degradation is minimized. The reaction can be carried out at a temperature of 80°C or less, and generally involves the use of an organic, nonmetallic catalyst, thereby ensuring that the deploymerization product(s) aer substantially free of metal contaminants. In an exemplary depolymerization method, the catalyst is a carbene compound such as an N-heterocyclic carbene, or is a precursor to a carbene compound. The method provides an important alternative to current recycling techniques such as those used in the degradation of polyesters, polyamides, and the like.
Inventors:
HEDRICK JAMES L
KILICKIRAN PINAR
NYCE GREGORY W
WAYMOUTH ROBERT M
KILICKIRAN PINAR
NYCE GREGORY W
WAYMOUTH ROBERT M
Application Number:
PCT/US2003/041283
Publication Date:
October 07, 2004
Filing Date:
December 23, 2003
Export Citation:
Assignee:
IBM (US)
UNIV LELAND STANFORD JUNIOR (US)
UNIV LELAND STANFORD JUNIOR (US)
International Classes:
C07C59/285; C07C67/03; C07C68/06; C07D233/02; C07D233/04; C07D233/06; C07D233/16; C07D233/54; C07D307/33; C07F1/00; (IPC1-7): C08J11/18; B01J31/22
Foreign References:
| US5728917A | 1998-03-17 |
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