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Elastomeric compositions

  • US 20070021560A1
  • Filed: 07/07/2006
  • Published: 01/25/2007
  • Est. Priority Date: 07/15/2005
  • Status: Active Grant
First Claim
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1. A composition comprising:

  • (i) at least one low molecular weight polyolefin;

    (ii) a block copolymer obtainable by selectively hydrogenating a block copolymer having terminal polymeric blocks of a vinyl aromatic monomer and a mid-block prepared originally with an olefin and subsequently hydrogenated; and

    (iii) polypropylene;

    (iv) with the proviso that when (i) is a PAO having a molecular weight of between about 400 and 1000 g/mole, either;

    (a) (iii) is a homopolymer characterized by an MFR greater than 2 g/10 min, (b) (iii) is a copolymer;

    or (c) (iii) is a polymer or copolymer made by a metallocene catalyst;

    or (d) the composition does not contain calcium carbonate.

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