| 摘要 |
The present invention is an elastomeric composition having a primary rubber component, and an elastomeric component. More particularly, in one embodimen t the elastomeric composition has from 50 to 95 phr natural rubber as the primary rubber component, from 5 to 40 phr of a copolymer of a C4 to C7 isoolefin and a para-alkylstyrene as the elastomeric component, and from 0 t o 40 phr of polybutadiene as a secondary rubber component. In one embodiment, the copolymer includes a terpolymer of isobutylene, para-methylstyrene and para-bromomethylstyrene, wherein the parabromomethylstyrene is present from 0.2 mol % to 3.0 mol %. Further, the composition desirably contains carbon black. The compositions are useful for tire treads and tire sidewalls having improved winter wear properties such as high DIN abrasion values and improve d Tangent Delta values. The compositions are also useful in any application where high damping and high abrasion resistance is desirable, such as in hoses, belts antivibrational mounts and shoe soles.
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