Low temperature fluorocarbon elastomers

Details Low temperature fluorocarbon elastomers Low temperature fluorocarbon elastomers

C - Chemistry, Metallurgy

08

F

C08F 216/14 (2006.01) C08F 214/22 (2006.01)

Patent

CA 2341460

A fluorocarbon polymer which includes: repeating units derived from one or more perfluorinated ethers of the formula CF2=CFO-(CF2)m-(O(CF2)p)n-ORf1 wherein Rf1 is a perfluorinated (C1-C4) alkyl group, m=1-4, n=0-6, and p=1-2; and repeating units derived from vinylidene fluoride; wherein the polymer has a glass transition temperature of -50 ~C or lower and an oxygen to carbon ratio of at least about 0.2.

L'invention concerne un polymère fluorocarboné contenant des unités récurrentes dérivées d'un ou de plusieurs éthers perfluorés de la formule CF¿2? = CFO-(CH¿2?)¿m?-(O(CF¿2?)¿p?)¿n?-OR¿f??1¿ dans laquelle R¿f??1¿ représente un groupe alkyle (C¿1?-C¿4?) perfluoré, m =1-4, n = 0-6 et p = 1-2; ainsi que des unités recurrentes dérivées de fluorure de vinylidène; le polymère ayant une température de transition vitreuse de -50 ·C ou inférieure ainsi qu'un rapport oxygène/carbone d'au moins environ 0,2.

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