| 摘要 |
PROBLEM TO BE SOLVED: To provide a rubber composition having excellent extrudability and inherent rubber properties of the component rubbers, which can produce an extrusion foamed rubber article suitable for a light-weight solid article having excellent appearance and stability in the cross-sectional shape, for examples, a seal article of a glass run channel, a window frame or a trunk, and the extrusion foamed rubber article. SOLUTION: The rubber composition comprises 100 parts by weight of an ethylene/α-olefine/non-conjugative polyene random copolymer rubber (A), 5-50 parts by weight of an ethylene/1-butene/non-conjugative polyene random copolymer rubber (B), and a softening agent (oil) (C), and has a specific gravity of 1.0-1.15, wherein the ethylene/α-olefine/non-conjugative polyene random copolymer rubber (A) can be obtained by copolymerizing ethylene, one or more ofα-olefines selected fromα-olefines having a carbon number of 3 or 5-20, and a non-conjugative polyene. The extrusion foamed rubber article can be obtained by extruding and foaming to mold the rubber composition.
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