| 摘要 |
<p>A rubber composition having a reduced heat build-up, which comprises (a) 100 wt. parts of an elastomer capable of being crosslinked by an organic peroxide crosslinking agent, (b) 10 - 150 wt. parts of a metal salt of an alpha , beta -ethylenically unsaturated carboxylic acid, (c) 5 to 100 wt. parts of magnesium oxide having a BET specific surface area not larger than 25 m<2>/g, and (d) 0.1 to 30 wt. parts of an organic peroxide crosslinking agent. A roll having an outer peripheral surface portion composed of a vulcanizate of the rubber composition. The roll has high strengths and reduced heat build-up, and is especially suitable for use under a high load.</p> |
