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US 10,851,225 B2Granted
Nitrile group-containing highly saturated copolymer rubber, cross-linkable rubber composition, and cross-linked rubber
AssigneeZeon Corporation
InventorsShinsuke Sugawara, Akito Nakai
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Abstract
The present invention provides a nitrile group-containing highly saturated copolymer rubber comprising an α,β-ethylenically unsaturated nitrile monomer unit (a1) in a content of 10 to 40 wt %, an α,β-ethylenically unsaturated monocarboxylic acid ester monomer unit (a2) in a content of 10 to 60 wt %, and a conjugated diene monomer unit (a3) in a content of 20 to 70 wt %, and having an iodine value of 35 to 85.
Claims20
A cross-linkable rubber composition comprising a nitrile group-containing highly saturated copolymer rubber and a cross-linking agent,
- the nitrile group-containing highly saturated copolymer rubber comprising an α,β-ethylenically unsaturated nitrile monomer unit (a1) in a content of 10 to 30 wt %, an α,β-ethylenically unsaturated monocarboxylic acid ester monomer unit (a2) in a content of 25 to 45 wt %, and a conjugated diene monomer unit (a3) in a content of 40 to 60 wt %, and having an iodine value of 35 to 85,
- wherein the cross-linking agent is an organic peroxide cross-linking agent.
Dependencies are inferred from the claim text.