| 摘要 |
A rubber composition which contains the following components (A)-(D) and is free from any zinc-containing compounds that would cause trouble at the time of use of the final products:(A): an ethylene-alpha-olefin copolymer rubber and/or ethylene-alpha-olefin-non-conjugated diene copolymer rubber,(B): magnesium oxide,(C): carbon black,(D): at least one compound selected from the following compounds (D-1)-(D-3):(D-1): compounds containing a thio group and a carboxylic acid ester group in the molecule,(D-2): compounds containing a phenolic hydroxyl group in the molecule,(D-3): compounds containing an acyl group and an imino group in the molecule,provides vulcanized products including radiator hoses, heater hoses and radiator packings with improved age resistance.
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