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US 8,557,474 B2Granted
Fluorosulfonyl group-containing monomer and its polymer, and sulfonic acid group-containing polymer
AssigneeAsahi Glass Company, Limited
InventorsAtsushi Watakabe, Hiromasa Yamamoto, Masao Iwaya, Susumu Saito
Life of this patent
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Abstract
A fluorosulfonyl group-containing monomer having a high polymerization reactivity and plural fluorosulfonyl groups, a fluorosulfonyl group-containing polymer and a sulfonic acid group-containing polymer, obtained by using the monomer.
Claims3
A sulfonic acid group-containing polymer comprising one or more units of tetrafluoroethylene and at least one type of units represented by the following formula (5U):
- wherein each of Rf1 and Rf2 which are independent of each other, is a C1-8 perfluoroalkylene group which may have an etheric oxygen atom between carbon atoms.
Dependencies are inferred from the claim text.