Vulcanized rubber composition and articles manufactured...

B - Operations – Transporting – 32 – B

Patent

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B32B 25/00 (2006.01) C08J 5/04 (2006.01) C08J 5/22 (2006.01) C08K 3/04 (2006.01) C08K 3/30 (2006.01) C08K 3/36 (2006.01) C08K 5/00 (2006.01) C08K 5/10 (2006.01) C08L 9/02 (2006.01) F16K 31/126 (2006.01)

Patent

CA 2542293

The rubber composition described herein have been found to have an exceptionally long life as a spring-biased actuator diaphragm material that maintains its position compressed, e.g., bolted, between opposed flanges, while maintaining excellent compressibility, low temperature flexibility, hydrocarbon resistance, abrasion resistance and mechanical strength. The compositions include a copolymer rubber component; a plasticizer for the copolymer rubber; a vulcanizing agent for the copolymer rubber; a silica filler; and a coupling agent, such as a silane coupling agent, capable of coupling the silica filler to the copolymer rubber. Ranges may be expressed herein as from ~about~ or ~approximately~ on particular value and/or to ~about~ or ~approximately~ another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value.

On a constaté que les compositions de caoutchouc de l'invention présentaient une longévité exceptionnelle en tant que membrane d'actionnement sous charge de ressort qui la maintient en position comprimée, par exemple visée entre des rebords opposés tout en conservant une compressibilité, une élasticité à basse température, une résistance aux hydrocarbures, une résistance à l'abrasion et une robustesse mécanique excellentes. La composition comprend un élément en caoutchouc de copolymère, un plastifiant pour le caoutchouc de copolymère, un agent vulcanisant pour ledit caouthcouc, une charge de silice et un agent adhésif au silane capable de faire adhérer la charge de silice au caoutchouc de copolymère. Dans le cadre de l'invention, les plages sont comprises entre une valeur approximative et une autre valeur approximative, les mêmes plages étant formulées de la même manière indépendamment du mode de réalisation.

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