Fluorinated ionomers with reduced amounts of carbonyl end groups

US7214740B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Kai H. Lochhaas · Neuötting, DE
• Klaus Hintzer · Woodbury, US
• Steven J. Hamrock · Saint Paul, US
• Michael A. Yandrasits · Hastings, US

Key dates

• Filing date: May 3, 2005
• Grant date: May 8, 2007
• Expiry date: May 3, 2025

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2327/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention is a fluoropolymer comprising a plurality of pendent groups terminating in —CF2SO3X, —CF2SO2F, or combinations thereof, where X is selected from a group consisting of H+ and a monovalent cation, and at least one —CF2Y end group, where Y is selected from a group consisting of a chlorine atom, a bromine atom, an iodine atom, a nitrile group, and an —SO3X group.