Crosslinkable rubber composition and crosslinked rubber
AssigneeZeon Corporation
InventorArinobu Katada
Life of this patent
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Abstract
Provided is a crosslinked rubber having excellent workability and heat resistance, and a crosslinkable rubber composition that can be used to form the crosslinked rubber. The crosslinkable rubber composition contains: a rubber including a carboxyl group-containing ethylenically unsaturated monomer unit; an amine-based crosslinking agent having a melting point of at least 50° C. and no higher than 180° C.; and one or more carbon nanotubes. The crosslinked rubber is obtainable through crosslinking of the crosslinkable rubber composition. The carbon nanotubes preferably have a BET specific surface area of from 600 m2/g to 2,000 m2/g.
Claims4
A crosslinkable rubber composition consisting of:
- a rubber including a carboxyl group-containing ethylenically unsaturated monomer unit;
- an amine-based crosslinking agent having a melting point of at least 50° C. and no higher than 180° C.;
- one or more carbon nanotubes;
- and
- at least one compounding agent selected from a group consisting of reinforcing fillers, calcium carbonate, clay, talc, diatomite, anti-aging agents, stearic acid, polyoxyethylene stearyl ether phosphoric acid, flame retardants, and colorants, wherein
- the rubber is a carboxylated nitrile rubber or a hydrogenated carboxylated nitrile rubber obtained through hydrogenation of the carboxylated nitrile rubber, and
- the carboxylated nitrile rubber consists of at least 0.1 mass % and no greater than 20 mass % of a carboxyl group-containing ethylenically unsaturated monomer unit, at least 5 mass % and no greater than 60 mass % of an α,β-ethylenically unsaturated nitrile monomer unit, at least 20 mass % and no greater than 89.5 mass % of a diene monomer unit and less than 50 mass % of another monomer unit selected from a group consisting of alkyl (meth)acrylate unit, aromatic vinyl monomer unit, fluorine-containing vinyl monomer unit and copolymerizable anti-aging agent unit.
Dependencies are inferred from the claim text.