| 摘要 |
PROBLEM TO BE SOLVED: To provide a long life rubber composition for wiper blade capable of giving a molded wiper blade product with excellent resistance due to environmental aging (heat resistant aging, weatherability and ozone proofness) together with dynamic fatigue resistance and its molded rubber wiper blade. SOLUTION: The rubber composition for wiper blade contains an ethylene-α-olefin-nonconjugated polyene copolymer rubber composed of ethylene, a 3-14Cα-olefin and a nonconjugated polyene prepared by using a metallocene catalyst. The rubber composition has characteristic features in particular ranges of molar ratios between a unit derived from ethylene of the copolymer rubber and a 3-14Cα-olefin, an iodine number and a limiting viscosity. The molded wiper blade has a characteristic feature of a vulcanized product of the above mentioned composition. COPYRIGHT: (C)2004,JPO&NCIPI
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