Polyethylene composition

Details Polyethylene composition Polyethylene composition

1991-12-30

1993-02-23

Seccuro, Jr., Carman J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 53, 525324, 525320, 525322, 525222, 525227, C08L 2306, C08L 2308, C08L 2316

Patent

active

051891069

ABSTRACT:
A polyethylene composition which has excellent flow characteristics and mechanical properties, especially low temperature mechanical properties as well as thermal stability, elasticity and workability for molding. The polyethylene composition comprises 20 to 80 wt. % of an ethylene-.alpha.-olefin copolymer of higher molecular weight having (a) intrinsic viscosity (.eta..sub.1) of 1.2 to 9.0 dl/g, (b) density (d.sub.1) of 0.890 to 0.935 g/cm.sup.3 (c) a specific areal ratio calculated with an elution temperature-eluate volume curve in elution fractionation, and (d) a specific quantity of the content which is soluble in 25.degree. C. o-dichlorobenzene, and 80 to 20 wt. % of ethylene homopolymer or ethylene-.alpha.-olefin copolymer of lower molecular weight having (e) intrinsic viscosity (.eta..sub.2) of 0.2 to 1.6 dl/g, (f) density (d.sub.2) of 0.890 to 0.980 g/cm.sup.3 and, wherein the above (.eta..sub.1) is larger than (.eta..sub.2), and the prepared composition has an intrinsic viscosity (.eta.) of 0.77 to 5.2 dl/g, a density (d) of 0.890 to 0.950 g/cm.sup.3 and a specific N-value of 1.7 to 3.5.

REFERENCES:
patent: 4438238 (1984-03-01), Fukushima et al.
patent: 4705829 (1987-11-01), Kwack et al.
patent: 4975485 (1990-12-01), Sato et al.
patent: 5102955 (1992-04-01), Calabra et al.
patent: 5126398 (1992-06-01), Lee et al.

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