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US 9,453,092 B2Granted
Process for converting a polymeric ester to a polymeric acid
AssigneeRelypsa, Inc.
InventorsEric Connor, Faleh Salaymeh
Life of this patent
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Abstract
The present invention generally relates to processes for converting an ester group to an acid group for polymers having a pendant ester of an acid group. This process is generally performed using an aqueous strong base.
Claims19
A process for converting an ester group of a polymer to an acid group comprising:
- forming a reaction mixture being an aqueous suspension and having a substantially oxygen-free atmosphere, the reaction mixture comprising an aqueous strong base solution and a polymer having a pendant ester of an acid group which hydrolyzes to produce a polymer comprising the pendant acid group or a salt thereof and an alcohol.
Dependencies are inferred from the claim text.