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Oxypropylation of cork and the use of the ensuing polyols in polyurethane formulations.

Authors
Type
Published Article
Journal
Biomacromolecules
Publication Date
Volume
3
Issue
1
Pages
57–62
Identifiers
PMID: 11866556
Source
Medline
License
Unknown

Abstract

Cork particles, recovered as byproducts of the processing of this natural material, were oxypropylated under pressure and relatively high temperature in the presence of KOH as catalyst. Various parameters were explored in order to assess the most suitable conditions, which led to the almost complete conversion of the solid cork into a viscous polyol. This product was a mixture of oxypropylated cork macromolecules and propylene oxide oligomers, which were thoroughly characterized. The use of these polyols as macromonomers in the synthesis of polyurethane foams gave promising results, thus showing that it should be possible to exploit the residues of this important renewable resource to manufacture original materials.

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