Polyolefin blends and pipe

Details Polyolefin blends and pipe Polyolefin blends and pipe

2007-12-18

2007-12-18

Mullis, Jeffrey (Department: 1711)

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

Synthetic resins

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

Reexamination Certificate

active

10858194

ABSTRACT:
A polyolefin blend comprising:(a) from 30 to 80 weight % of a low molecular weight copolymer comprising from 85 to 100 weight % of ethylene and from 15 to 0 weight % of one or more C4-8alpha olefins having a density from 0.953 to 0.965 g/cm3and a melt flow rate (2.16 kg 190° C.) from 0.1 to 20.0 g/10 minutes; and(b) from 70 to 20 weight % of a high molecular weight copolymer comprising from 85 to 99.9 weight % of ethylene and from 15 to 0.1 weight % of one or more C4-8alpha olefins having a density from 0.915 to 0.940 g/cm3and a melt flow rate (21.6 kg 190° C.) from 0.05 to 5.0 g/l 0 minutes, said copolymer being prepared with a single site catalyst is useful in the preparation of pipe.

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