Ethylene polymer composition

Details Ethylene polymer composition Ethylene polymer composition

2007-06-19

2007-06-19

Rabago, Roberto (Department: 1713)

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

Synthetic resins

Polymerizing in two or more physically distinct zones

C526S124200, C526S348000, C525S053000, C525S240000

Reexamination Certificate

active

10480548

ABSTRACT:
An ethylene polymer composition having a density of at least 950 kg/m3, a fluidity index MI5of 0.05 to 2 g/10 min and a content of alpha-olefin containing from 4 to 10 carbon atoms of from 0.15 to 1 mole %, containing from 53 to 63% by weight based on the total weight of the composition of an ethylene polymer fraction (A) having a fluidity index MI2of at least 100 g/10 min a density of at least 969 kg/m3and a molecular weight distribution Mw/Mngreater than 4, and from 37 to 47% by weight based on the total weight of the composition of a copolymer fraction (B) of ethylene and from 0.32 to 2.7 mole % of at least one alpha-olefin containing from 4 to 10 carbon atoms, a fluidity index MI5to 0.001 to 0.5 g/10 min, a density of no more than 930 kg/m3and a molecular weight distribution Mw/Mngreater than 4, wherein the ratio of the MI2of fraction (A) to the MI5of fraction (B) is greater than 20,000.

REFERENCES:
patent: 5306775 (1994-04-01), Martin et al.
patent: 6136924 (2000-10-01), Promel
patent: 6225421 (2001-05-01), Promel et al.
patent: 19929812 (2001-01-01), None
patent: 0897934 (2001-05-01), None
patent: 1199161 (2002-04-01), None

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