| 摘要 |
PROBLEM TO BE SOLVED: To provide an acrylic rubber composition giving a vulcanized product having highly balanced heat-resistance, especially the residual ratio of tensile strength and the residual ratio of elongation after thermal aging without deteriorating physical properties in a normal state, its vulcanized product, and a hose, a sealing part and a vibration-proof rubber article produced by using the composition. SOLUTION: The acrylic rubber composition is produced by copolymerizing 100 pts.mass of a (meth)acrylic acid alkyl ester with 1-10 pts.mass of vinyl acetate and 1-3 pts.mass of a crosslinking monomer. The (meth)acrylic acid alkyl ester is preferably formed by compounding 100 pts.mass of ethyl acrylate with 50-200 pts.mass of at least one kind of compound selected from methyl acrylate, n-butyl acrylate, n-decyl (meth)acrylate and n-dodecyl (meth)acrylate, and more preferably, copolymerizing≤15 pts.mass of ethylene. COPYRIGHT: (C)2009,JPO&INPIT
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