Heat resistant rubber compsns.

Heat resistant rubber compsns.

  • CN 1,294,147 A
  • Filed: 07/26/2000
  • Published: 05/09/2001
  • Est. Priority Date: 04/11/1995
  • Status: Abandoned Application
First Claim
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1. heat-resistant rubber comosition is characterized in that contained ethylene/alpha-olefin/unconjugated polyene copolymer rubber (A) is the mixture of following component:

  • The limiting viscosity [η

    ] that (I) 30-95 weight part records in 135 ℃

    of perhydronaphthalenes is the ethylene/alpha-olefin/unconjugated polyene copolymer rubber of 0.1-10dl/g (A1),The limiting viscosity [η

    ] that [II] 5-70 weight part records in 135 ℃

    of perhydronaphthalenes is the ethylene/alpha-olefin/unconjugated polyene copolymer rubber of 0.1-5dl/g (A2), this limiting viscosity is different from the limiting viscosity of ethylene/alpha-olefin/unconjugated polyene copolymer rubber (A1)Described component (A1) and total amount (A2) are 100 weight parts,Described ethylene/alpha-olefin/unconjugated polyene copolymer rubber (A1) has following character;

    (1) described copolymer rubber is ethene, contains the copolymer rubber that the alpha-olefin of 3-20 carbon atom and unconjugated polyene constitute,(2) ethene and the mol ratio of alpha-olefin that contains 3-20 carbon atom be between 40/60 to 95/5 (ethylene/alpha-olefin),(3) unconjugated polyene is 5-methylene-2-norbornene or 5-vinyl-2-norbornylene,(4) content by the iodine number unconjugated polyene is 0.5-50g/100g, andDescribed ethylene/alpha-olefin/unconjugated polyene copolymer rubber (A2) has following character;

    (1) described copolymer rubber is ethene, contains the copolymer rubber that the alpha-olefin of 3-20 carbon atom and unconjugated polyene constitute,(2) ethene and the mol ratio of alpha-olefin that contains 3-20 carbon atom be between 40/60 to 95/5 (ethylene/alpha-olefin),(3) unconjugated polyene is 5-methylene-2-norbornene, 5-vinyl-2-norbornylene, 5-isopropenyl-2-nirbornene or 5-isobutenyl-2-norbornylene,(4) content by the iodine number unconjugated polyene is 0.5-50g/100g.

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