RUBBER COMPOSITION AND SEALING MEMBER FOR AUTOMOBILE

摘要

PROBLEM TO BE SOLVED: To provide a rubber composition excellent in processability while improving properties to electrolytically corrode an aluminum alloy without consideration of the surface electric resistance of a rubber member. SOLUTION: An unvulcanized rubber composition comprising 100 phr of an ethylene-α-olefin-nonconjugated diene copolymer rubber and C phr of carbon black has viscoelastic properties that satisfy (a) and (b) below: (a) apparent activation energy Ea (×10-1KJ/mol) of complex viscosity is 50≤Ea≤250; and (b) the rate of change of complex modulus G*r is 0.9×(100-0.36C)≤G*r (%). COPYRIGHT: (C)2005,JPO&NCIPI