Laminate of vulcanizable rubber composition layers, process...

B - Operations – Transporting – 32 – B

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B32B 25/14 (2006.01) B32B 1/08 (2006.01) C08K 5/50 (2006.01) C08L 9/02 (2006.01) F16L 11/04 (2006.01)

Patent

CA 2181925

A laminate of a layer of a vulcanizable fluororubber composition comprising a fluororubber and a metal oxide and a layer of a vulcanizable nitrile rubber composition comprising a nitrile rubber, an organic phosphonium salt represented by general formula (1), and organic peroxide-cross-linked and basic organic vulcanization accelerators, (wherein R1, R2, R3 and R4 represents each a hydrocarbon group and at most three of them may be amino or fluoroalkyl; and R5 represents hydrogen or alkyl). A laminate produced by vulcanizing and bonding the above laminates is useful as fuel hoses and diaphragms.

L'invention concerne un stratifié d'une couche d'une composition de caoutchouc fluoré vulcanisable comprenant un caoutchouc fluoré ainsi qu'un oxyde de métal, et d'une couche d'une composition de caoutchouc nitrile vulcanisable comprenant un caoutchouc nitrile, un sel de phosphonium organique représenté par la formule générale (I), ainsi que des accélérateurs de vulcanisation organiques de base et réticulés par du peroxyde organique. Dans ladite formule, R¿1?, R¿2?, R¿3? et R¿4? représentent chacun un groupe hydrocarbure et au moins trois d'entre eux peuvent représenter amino ou fluoroalkyle, et R¿5? représente hydrogène ou alkyle. Un stratifié produit par vulcanisation et liaison des stratifiés précités est utile en tant que diaphragmes et tuyaux d'essence.

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