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US 6,608,167 B1Granted
Bis(2-hydroxyethyl isosorbide); preparation, polymers derived therefrom, and enduses thereby
AssigneeE. I. Du Pont de Nemours and Company
InventorsRichard Hayes, Charles Brandenburg
Life of this patent
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Abstract
This invention provides a new, biomass-derived glycol, bis(2-hydroxyethyl)isosorbide, which is found to be a valuable monomer for a wide variety of polymeric materials.
Claims4
Bis(2-hydroxyethyl)isosorbide.
A process for producing bis(2-hydroxyethyl)isosorbide comprising the steps of:
- (a) contacting isosorbide with a stoichiometric excess of ethylene carbonate in the presence of a catalyst,
- (b) heating the product of step (a) gradually, with mixing, at a temperature sufficient to substantially evolve carbon dioxide from said product, and
- (c) cooling the product of step (b) to ambient temperature.
Dependencies are inferred from the claim text.