Rheology-modified thermoplastic elastomer compositions for extruded profiles

Rheology-modified thermoplastic elastomer compositions for extruded profiles

  • CN 1,703,451 A
  • Filed: 10/01/2003
  • Published: 11/30/2005
  • Est. Priority Date: 10/01/2002
  • Status: Active Application
First Claim
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1. rheology modified, the composition for thermoplastic elastomer of gel-free, it comprises at least a elastomeric ethylene/alpha-olefinic polymer or ethylene/alpha-olefin polymer blends and at least a high-melting-point polymer that is selected from homopolymer polypropylene and the propylene/ethylene copolymer, wherein this rheology modified be to induce by the binding substances that comprises following superoxide of 0.075wt% or 0.075wt% and free radical auxiliary agent, this superoxide:

  • the auxiliary agent ratio is that 1;

    4 to 1;

    20 and this are rheology modified, the composition for thermoplastic elastomer of gel-free has the STI of 15-30,1.05-1.40 the tan δ

    under 190 ℃ and

    when at ASTM D 2765-90, be lower than the gel content of limit of detection when using dimethylbenzene as solvent among the method B.

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