Modified sulfonamide polymers
AssigneeOsmonics, Inc.
InventorsChristopher J. Kurth, Steven D. Kloos, Jessica A. Peschl, Leonard T. Hodgins
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Abstract
The invention provides secondary sulfonamide polymers, wherein some, most, or all of the sulfonamido protons have been replaced with a substituent other than hydrogen. The invention also provides methods for preparing such polymers as well as devices (e.g. composite membranes) incorporating such membranes.
Claims7
A method for preparing a secondary sulfonamide polymer, the method comprising, alkylating one or more sulfonamido nitrogens of a corresponding primary sulfonamide polymer under acidic conditions;
- provided the primary sulfonamide polymer is not derived or derivable from a branched or unbranched polyalkylamine having greater than 35 repeating monomeric alkylamine units.
A method for preparing a solid secondary sulfonamide polymer, the method comprising, replacing one or more sulfonamido protons of a corresponding solid primary sulfonamide polymer that is part of a membrane with a substituent other than hydrogen;
- provided the primary sulfonamide polymer is not derived or derivable from a branched or unbranched polyalkylamine having greater than 35 repeating monomeric alkylamine units.
Dependencies are inferred from the claim text.