Crosslinked fluoropolymer networks

US8580897B2 · kind B2 · utility

Assignees

• E.I. DU PONT DE NEMOURS AND COMPANY · US
• Le Centre National de la Recherche Scien · FR

Inventors

• Ming-Hong Hung · Wilmington, US
• Bruno Ameduri · Montpellier, FR
• Georgi Kostov · Burgas, BG

Key dates

• Filing date: Nov 14, 2012
• Grant date: Nov 12, 2013
• Expiry date: Nov 14, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F299/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed herein is a crosslinked fluoropolymer network formed by the free radical initiated crosslinking of a diacrylate fluoropolymer. The diacrylate copolymer is of formula CH2═CR′COO—(CH2)n—R—(CH2)n—OOCR′═CH2, wherein R is selected from the group consisting of i) an oligomer comprising copolymerized units of vinylidene fluoride and perfluoro(methyl vinyl ether), ii) an oligomer comprising copolymerized units of vinylidene fluoride and hexafluoropropylene, iii) an oligomer comprising copolymerized units of tetrafluoroethylene and perfluoro(methyl vinyl ether), and iv) an oligomer comprising copolymerized units of tetrafluoroethylene and a hydrocarbon olefin, R′ is H or —CH3, n is 1-4 and wherein said oligomer has a number average molecular weight of 1000 to 25,000 daltons. The source of the free radicals may be a photoinitiator or an organic peroxide.