Patent · US Active

Mononuclear salen indium catalysts and methods of manufacture and use thereof

US10280185B2 · kind B2 · utility

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Key dates

Filing dateJun 26, 2015
Grant dateMay 7, 2019
Priority date—
Expiry dateSep 22, 2035

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC08G63/84
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

The present application provides salen indium catalysts of the following general structure wherein R is a coordinating alkoxide comprising at least one coordinating atom that forms a dative bond with In. The mononuclear salen indium catalysts are particularly useful in catalyzing ring-opening polymerizations of cyclic ester monomers, such as lactides. Also provided herein are methods of using the mononuclear salen indium complexes to catalyze polymerization of cyclic ester monomers. Of particular interest is the successful polymerization of lactides using the mononuclear salen indium catalysts to produce poly(lactic acid) having high isotacticity.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.