The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 2021
Filed:
Sep. 22, 2016
3m Innovative Properties Company, St. Paul, MN (US);
Gregg D. Dahlke, St. Paul, MN (US);
Denis Duchesne, Woodbury, MN (US);
Klaus Hintzer, Kastl, DE;
Markus E. Hirschberg, Burgkirchen, DE;
Kai H. Lochhaas, Neuötting, DE;
Arne Thaler, Emmerting, DE;
Tilman C. Zipplies, Burghausen, DE;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A method of making a copolymer is disclosed. The method includes copolymerizing components including tetrafluoroethylene and a compound represented by formula CF═CF—O—(CF)—SOX, wherein 'a' is a number from 1 to 4, and X is —NZH, —NZ—SO—(CF)—SOX', or —OZ, wherein Z is independently a hydrogen, an alkali metal cation, or a quaternary ammonium cation, and wherein X′ is independently —NZH or —OZ. The components include at least 60 mole % of tetrafluoroethylene based on the total amount of components. A copolymer prepared by the method is also provided. A method of making a membrane using the copolymer is also provided. The present disclosure also provides a polymer electrolyte membrane that includes a copolymer made by the method and a membrane electrode assembly that includes such a polymer electrolyte membrane.