(per)fluoroelastomeric compositions

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 65/00 (2006.01) C08K 3/04 (2006.01) C08L 27/12 (2006.01) C08L 71/00 (2006.01)

Patent

CA 2656774

A (per)fluoroelastomeric composition curable by peroxidic way comprising for 100 phr of (per)fluoroelastomer: - as filler, from 2 to 70 phr of carbon black having a surface area between 25 and 35 m2/g; - as crosslinking agent, from 0.5 to 10 phr of a bis-olefin having general formula (I) wherein: R1, R2, R3, R4, R5, R6, equal to or different from each other, are H or C1-C5 alkyls; Z is selected between a linear or branched C1-C18 alkylene or cycloalkylene radical, optionally containing oxygen atoms, preferably at least partially fluorinated, or a (per)fluoropolyoxyalkylene radical.

L'invention concerne une composition (per)fluoroélastomère durcissable au peroxyde qui comprend pour 100 phr de (per)fluoroélastomère: - entre 2 et 70 phr de noir de carbone possédant une superficie comprise entre 25 et 35 m2/g en tant que charge, - entre 0,5 et 10 phr d'une bis-oléfine représentée par la formule générale (I) en tant qu'agent de réticulation. Dans cette formule (I) R1, R2, R3, R4, R5, R6, sont égaux ou différents entre eux, et représentent H ou des alkyles en C1-C5; Z est sélectionné parmi un radical alkylène ou cycloalkylène en C1-C18 linéaire ou ramifié, contenant éventuellement des atomes d'oxygène, de préférence au moins partiellement fluorés, ou un radical (per)fluoropolyoxyalkylène.

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