Peroxide vulcanizable butyl compositions useful for rubber...

C - Chemistry – Metallurgy – 08 – L

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C08L 23/22 (2006.01) C08J 5/00 (2006.01) C08L 23/06 (2006.01) C08L 23/20 (2006.01)

Patent

CA 2587743

The present invention is directed to a peroxide curable rubber composition containing a butyl rubber polymer, a high vinyl polybutadiene polymer; an olefin polymer of ethylene, at least one alpha-olefin, and optionally at least one diene, and between 1 to 10 phr of a peroxide curing agent. The present invention is also directed to a peroxide curable rubber composition containing a butyl polymer, an EP(D)M rubber polymer, and a 1,2-polybutadiene polymer. Shaped articles made from the compositions find use as containers for pharmaceuticals, a condenser cap, a seal for fuel cells, a container containing electrolytes, rings, dampening devices, seals and sealants.

L'invention concerne une composition de caoutchouc vulcanisable au peroxyde qui contient un polymère de butylcaoutchouc; un polymère polybutadiène vinylique élevé; un polymère oléfinique d'éthylène; au moins une alpha-oléfine; et éventuellement au moins un diène; et entre 1 et 10 phr d'un agent de vulcanisation au peroxyde. Par ailleurs, l'invention concerne une composition de caoutchouc vulcanisable au peroxyde qui contient un polymère butylique, un polymère caoutchouc EP(D)M, et un polymère 1,2-polybutadiène. Des articles formés à partir de ces compositions sont utilisés comme récipient pour produits pharmaceutiques, bouchon de condensateur, élément d'étanchéité pour piles à combustible, récipient pour électrolytes, anneaux, des dispositifs amortisseurs, joints et produits d'étanchéité.

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