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US Patent 7405330 Preparation of polytrimethylene ether glycol and copolymers thereof

Patent 7405330 was granted and assigned to E.I. Du Pont De Nemours And Company on July, 2008 by the United States Patent and Trademark Office.

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Patent abstract

The present invention relates to a process comprising using ionic liquids for the polycondensation of 1,3-propanediol reactants to produce polytrimethylene ether glycol and copolymers thereof.

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