| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealing rubber parts which is considerably improved in the cold temperature flexibility without damaging the excellent thermal aging resistance and weatherability which an EPDM originally possesses and to provide a wiper blade rubber which is excellent in the flexibility at low temperatures and rubber elasticity. SOLUTION: The wiper blade rubber comprises a composition which contains a random copolymer rubber consisting of ethylene, a 3-20Cα-olefin and a branched-chain polyene compound such as 4-ethylidene-8-methyl-1, 7-nonadiene or the like; a vulcanizing agent; and a filler, with the above copolymer rubber having a molar ratio of ethylene toα-olefin, an iodine value and a limiting viscosity each within a specified range. The above wiper blade rubber has an excellent cold temperature flexibility and excellent wiping effect even under such a cold environment as 0°C or below. COPYRIGHT: (C)2004,JPO
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