Cross-linked rubber and production method therefor
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United States of America Patent
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Aug 10, 2021
Grant Date -
Apr 16, 2020
app pub date -
Jun 6, 2018
filing date -
Jun 6, 2017
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Abstract
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° 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° C., 72 hours) of not less than −10% and not more than 10%.
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