One-shot mouldable cis-polyisoprene rubber composition

C - Chemistry – Metallurgy – 08 – F

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400/1126, 400/64

C08F 279/02 (2006.01) C08F 8/00 (2006.01)

Patent

CA 1043488

ABSTRACT OF THE DISCLOSURE One shot mouldable and curable homogeneous rubber composition consisting mainly of polyisoprene rubber and a monomer mixture composed of divinylbenzene and .alpha.-methyl- styrene in specifically limited weight ratios of the rubber/ the monomer mixture and of divinylbenzene/.alpha.-methylstyrene and containing small amounts of organic peroxide and at least one of amine compound and phenol compound. The cured product of the rubber composition has high Young's modulus, tear energy and tensile strength retention. More improved cured rubbers having these physical properties well balanced in a high level can be easily obtained by additionally adding a small amount of sulfur or p-quinonedioxime to the above rubber composition. The rubber composition of the present invention is useful as a material for producing one shot moulded articles, which are used under severe temperature and mechanical conditions, such as vibration insulating rubber, bumber, tire, flexible joint, guide roller, dock fender, belt, hose, packing material, joint sealing element, sealing material and other weter-resistant material, heat-resistant material, low-temperature resistant material and the like.

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