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Radiation-sterilized shaped articles of olefin polymers

  • US 3,940,325 A
  • Filed: 08/24/1973
  • Issued: 02/24/1976
  • Est. Priority Date: 08/24/1972
  • Status: Expired due to Term
First Claim
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1. Shaped articles comprising at least one polymer selected from the group consisting of homopolymers of propylene;

  • homopolymers of propylene containing therein 0.1-4% by weight based on the weight of homopolymers of propylene, of ethylene-propylene rubber;

    propylene-ethylene copolymers containing therein 0.5-20% by weight based on the weight of propylene, of ethylene;

    high density polyethylenes having a density of 0.950 to 0.965 g/c.c.;

    g/cc.;

    low density polyethylenes having a density of 0.905 to 0.925 g/c.c.; and

    homopolymers of propylene containing therein 0.5-4% by weight based on the weight of homopolymers of propylene, of high density or low density polyethylene and 0.01-0.5% by weight based on the weight of the olefin polymer or polymers, of at least one material selected from the group consisting of octadecyl 3,5-di-t-butyl-4-hydroxyhydrocinnamate and tetrakis (methylene(3,5-di-t-butyl -4-hydroxyhydrocinnamate)) methane, and irradiated with a sterilizing dose of high energy radiation.

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