Vinyl monomer with superacid ester group and polymer of the same

US7473748B2 · kind B2 · utility

Assignee

• ASAHI KASEI KABUSHIKI KAISHA · JP

Inventors

• Nobuto Hoshi · Fuji, JP
• Nobuyuki Uematsu · Hoya, DE
• Oliver Gronwald · Frankfurt, DE
• Takehiro Koga · Yokohama, JP
• Masanori Ikeda · Yamanashi, JP

Key dates

• Filing date: Jan 21, 2005
• Grant date: Jan 6, 2009
• Expiry date: Dec 4, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F14/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A superacidic ester group is useful in the production of ionomers for polymer electrolyte fuel cells. A polymer is produced from said vinyl monomer. A process produces a polymer containing a superacidic group. The vinyl monomer contains a haloalkyl ester group of a superacid, wherein the number of carbon atoms of the haloalkyl ester group is no more than 10, and the halogen in the haloalkyl group is chlorine and/or fluorine. A polymer containing said vinyl monomer as a repeating unit can be converted to a polymer containing a superacid group using at least one procedure of 1) heat treating at 50°C. to 350°C., and 2) contacting with a protic compound.