Crosslinked rubber
US11192975B2 · kind B2 · utility
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1References
3Claims
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Key dates
| Filing date | Aug 16, 2017 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | Aug 26, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2380/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A crosslinked rubber is produced by crosslinking a polymer composition containing 100 parts by weight of a rubber component containing a cyclopentene ring-opening polymer and 20 to 200 parts by weight of carbon black, wherein, when the crosslinked rubber is subjected to an ozone treatment in which the rubber is maintained at 40° C. and an ozone concentration of 50 pphm for 144 hours under a 20% tensile strain, the crosslinked rubber shows a rate of change in tensile strength before and after ozone treatment of within ±70%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.