Polyethylene pipe resins and production thereof

Details Polyethylene pipe resins and production thereof Polyethylene pipe resins and production thereof

2006-05-02

2006-05-02

Lu, Caixia (Department: 1713)

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

Synthetic resins

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

C525S191000

Reexamination Certificate

active

07037977

ABSTRACT:
A polyethylene resin comprising a blend of from 35 to 49 wt % of a first polyethylene fraction of high molecular weight and 51 to 65 wt % of a second polyethylene fraction of low molecular weight, the first polyethylene fraction comprising a linear low density polyethylene having a density of up to 0.928 g/cm3, and an HLMI of less than 0.6 g/10 min and the second polyethylene fraction comprising a high density polyethylene having a density of at least 0.969 g/cm3, and an MI2of greater than 100 g/10 min, and the polyethylene resin, having a density of greater than 0.951 g/cm3and an HLMI of from 1 to 100 g/10 min.

REFERENCES:
patent: 4461873 (1984-07-01), Bailey et al.
patent: 5306775 (1994-04-01), Martin et al.
patent: 6346575 (2002-02-01), Debras et al.
patent: 6380311 (2002-04-01), Razavi et al.
patent: 6579922 (2003-06-01), Laurent
patent: 0881237 (1998-12-01), None
patent: 0989141 (2000-03-01), None
patent: WO 00/60001 (2000-10-01), None

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