The invention is related to compositions suitable for the fabrication of pipes, and other articles, with excellent performance properties. The invention provides a composition, comprising a blend, wherein said blend comprises a high molecular weight ethylene-based interpolymer and a low molecular weight ethylene-based interpolymer, and the high molecular weight ethylene-based interpolymer is a heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.922 g/cc to 0.929 g/cc, and a high load melt index (I21) from 0.2 g/10 min to 1.0 g/10 min, and the low molecular weight ethylene-based interpolymer is heterogeneously branched linear or a homogeneously branched linear ethylene-based interpolymer, and has a density from 0.940 g/cc to 0.955 g/cc, and a melt index (I2) from 6 g/10 min to 50 g/10 min.; The blend has a single peak in an ATREF profile eluting above 30 DEG C, and has a coefficient of viscosity average molecular weight (CM?) less than -0.0032 in the log(calculated Mv) versus elution temperature, said CMv calculated in the range of elution temperatures from 70 DEG C to 90 DEG C. The Mv is the viscosity average molecular weight.

Title
Polyethylene compositions, methods of making the same, and articles prepared therefrom
Application Number
EP20070854209 20071019
Publication Number
2076565 (A2)
Application Date
October 19, 2007
Publication Date
July 8, 2009
Inventor
Ho Thoi
US
Neubauer Anthony
US
Kinnan Michael
US
Whited Stephanie
US
Hazlitt Lonnie
US
Chang Dane
US
Michie William
US
Assignee
Dow Global Technologies
US
IPC
C08L23/00
C08L 23/00
C08L23/00
C08L 23/00
View Original Source Download PDF