Ethylene copolymer

Details Ethylene copolymer Ethylene copolymer

2006-11-28

2006-11-28

Choi, Ling-Sui (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S348000, C526S160000, C526S943000, C526S127000

Reexamination Certificate

active

07141639

ABSTRACT:
An object of the present invention is to provide an ethylene-α-olefin copolymer excellent in extrusion molding processability and in the balance between the appearance and impact strength. This object is achieved by a copolymer of ethylene and α-olefin of from 4 to 20 carbon atoms having melt flow rate (MFR; unit is g/10 minutes), melt tension at 190° C. (MT; unit is cN), intrinsic viscosity ([η]; unit is dl/g), the chain length A and characteristic relaxation time at 190° C. (τ; unit is sec) which satisfy the specific relations.

REFERENCES:
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patent: 5700895 (1997-12-01), Kanda et al.
patent: 5849653 (1998-12-01), Dall'Occo et al.
patent: 640627 (1995-03-01), None
patent: 4-213309 (1992-08-01), None
patent: 6-009724 (1994-01-01), None

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