Copolycondensation polymerization of fluoropolymers

US8247614B2 · kind B2 · utility

Assignees

• E.I. DU PONT DE NEMOURS AND COMPANY · US
• LE CENTRE NATIONAL DE LARECHERCHE SCIENTIFIQUE · FR

Inventors

• Ming-Hong Hung · Wilmington, US
• Bruno Ameduri · Montpellier, FR
• Bernard Boutevin · Montpellier, FR
• Aurelien Soules · Béziers, FR

Key dates

• Filing date: Jun 17, 2009
• Grant date: Aug 21, 2012
• Expiry date: Sep 17, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2810/40
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Fluorinated copolymers are prepared via copolycondensation polymerization in a process comprising reacting A) a telechelic fluoroazido compound of formula N3(Y)p—(CH2)n—R—(CH2)m—(Y)pN3, wherein Y is SO, SO2, C6H4, or CO, p=0 or 1, n and m are independently 1 to 4, and R is selected from the group consisting of i) a C3-C10 fluoroalkylene group, ii) a C3-C10 fluoroalkoxylene group, iii) a substituted aryl group, iv) an oligomer comprising copolymerized units of vinylidene fluoride and perfluoro(methyl vinyl ether), v) an oligomer comprising copolymerized units of vinylidene fluoride and hexafluoropropylene, vi) an oligomer comprising copolymerized units of tetrafluoroethylene and perfluoro(methyl vinyl ether), and vii) an oligomer comprising copolymerized units of tetrafluoroethylene and a hydrocarbon olefin with B) a telechelic diyne or dinitrile compound in the presence of copper halide catalyst.