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Blend of three ethylene polymers

  • US 4,336,352 A
  • Filed: 08/11/1980
  • Issued: 06/22/1982
  • Est. Priority Date: 08/24/1979
  • Status: Expired due to Term
First Claim
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1. A composition comprising a mixture of three polymers (A), (B) and (C) which are selected from the group consisting of homopolymers of ethylene and copolymers of ethylene with a member selected from the group consisting of propylene, butene, pentene, 4-methylpentene-1, hexene, octene, and decene, the composition being characterized in that:

  • (i) the viscosity average molecular weight of (A) is 1,000-100,000, the viscosity average molecular weight of (B) is 100,000-1,000,000, the viscosity average molecular weight of (C) is 400,000-6,000,000, the molecular weight ratio of (B) to (A), (B/A), is 2-200, and the molecular weight ratio of (C) to (B), (C/B), is 1.5 or more,(ii) the mixing ratio of (A) to (B), (A/B), is 30/70 to 70/30 and the mixing ratio of (C) to the total composition is 1-10% by weight,(iii) melt index of the composition is 0.001-1, and(iv) density of the composition is 0.976-0.935.

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