Fluoropolymer for making a fluoroelastomer

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 214/18 (2006.01) C08K 5/00 (2006.01)

Patent

CA 2589339

The present invention provides a fluoropolymer comprising repeating units derived from one or more gaseous fluorinated olefins and having one or more cure sites comprising (a) a halogen capable of participating in a peroxide cure reaction or (b) a nitrile group, said fluoropolymer further comprising repeating units derived from one or more fluorinated allyl ethers of the formula: CF2 =CF-CF(Z)-O-Rf (I) wherein Z represents F or CF3 and R f represents a fluorinated alkyl group that may contain one or more catenary oxygen atoms. The fluoropolymer can be cured to a fluoroelastomer. The invention thus also provides a curable fluoroelastomer composition comprising the fluoropolymer and a curing agent.

La présente invention concerne un fluoropolymère comprenant des motifs répétés dérivés d~une ou plusieurs oléfines gazeuses fluorées et qui possède un ou plusieurs sites de durcissement comprenant (a) un halogène capable de prendre part à une réaction de durcissement au peroxyde ou (b) un groupe nitrile, ledit fluoropolymère comprenant en outre des motifs répétés dérivés d~un ou plusieurs éthers allyliques fluorés de formule : CF2=CF-CF(Z)-O-Rf (I) dans laquelle Z représente F ou CF3 et R f représente un groupe alkyle fluoré susceptible de contenir un ou plusieurs atomes d~oxygène caténaires. Le fluoropolymère peut être durci pour produire un fluoroélastomère. L~invention concerne ainsi également une composition de fluoropolymère durcissable comprenant le fluoropolymère et un agent de durcissement.

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