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Impact-resistant compatibilized polymer blends of olefin polymers and polyamides

  • US 5,278,231 A
  • Filed: 09/16/1992
  • Issued: 01/11/1994
  • Est. Priority Date: 05/24/1990
  • Status: Expired due to Term
First Claim
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1. A blended polymer composition comprising(I) from about 60% to about 90% by weight of at least one alpha-olefin polymer selected from the group consisting of polypropylene and copolymers of ethylene and propylene;

  • (II) from about 5% to about 25% by weight of at least one polyamide;

    (III) from about 5% to about 25% by weight of at least one copolymer of a vinyl aromatic hydrocarbon and an unsaturated mono-or dicarboxylic acid reagent, wherein the copolymer is other than a graft copolymer; and

    (IV) from about 1% up to about 25% by weight of a mixture of two or more compatibilizing agents selected from the group consisting of(IVa) at least one selectively hydrogenated block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene;

    (IVb) at least one selectively hydrogenated block copolymer of a vinyl aromatic hydrocarbon and a conjugated diene to which has been grafted, an alpha, beta-olefinically unsaturated monocarboxylic or dicarboxylic acid reagent; and

    (IVc) at least one terpolymer of an alpha-olefin, at least one acrylic ester, and an alpha, beta-olefinically unsaturated dicarboxylic acid reagent, or a glycidyl acrylate, wherein (IV) comprises mixtures of (IVa) and (IVb), (IVa) and (IVc), (IVb) and (IVc), or (IVa), (IVb), and (IVc).

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