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US 7,816,484 B2Granted
Method for making polyethylene glycol carbonates
AssigneeDr. Reddy's Laboratories, Inc.
InventorDaniel E. Verral
Life of this patent
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Abstract
A method for preparing a polyalkylene glycol carbonate is disclosed comprising reacting a hydroxyl functional polyalkylene glycol and a reagent selected from carbonates and chloroformates in the presence of an aromatic solvent and an amine.
Claims13
A method for making a polyalkylene glycol carbonate comprising the step of reacting a hydroxyl functional polyalkylene glycol and a reagent that is an aryl chloroformate in the presence of an aromatic solvent and an amine.
Dependencies are inferred from the claim text.