Zeon Corporation

Anna Komatsu

Kenji Hata

Masaaki Komatsu

Seisuke Ata

Shigeki Tomonoh

Provided is a cross-linked rubber that can improve long-term sealing properties of a seal member in high-temperature and high-pressure environments. The cross-linked rubber is obtained through cross-linking of a cross-linkable rubber composition containing a fluororubber, carbon black, one or more carbon nanotubes, and an organic peroxide cross-linker, and has a 50% modulus of 5 MPa or more, a compression set (230&#xb0; C., 500 hours) of 80% or less, and a rate of change of elongation at break between before and after a heat aging test (230&#xb0; C., 72 hours) of not less than &#x2212;10% and not more than 10%.

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Tokyo, Japan

Anna Komatsu