Dow Global Technolgoies LLC

Amaia Bastero

Mehmet Demirors

Jian Jim Wang

Mridula Babli Kapur

Philip P Fontaine

Douglas S Ginger

David Lopez

Jian Wang

David López

An ethylene/alpha-olefin copolymer composition having a density from 0.935 to 0.955 g/cc; a ratio of weight average molecular weight to number average molecular weight, Mw/Mn, of from 3 to 10; a z-average molecular weight, Mz, from 200 kg/mol to 500 kg/mol; and a PENT value of greater than 500 hours at 80&#xb0; C. and 2.4 MPa; wherein when the composition is formed into a monolayer pipe the pipe has a pipe hydrostatic strength of greater than 100 hours at 20&#xb0; C. and 12.0 MPa. Also provided is a pipe or pipe fitting comprising the ethylene/alpha-olefin copolymer composition.

Ethylene/alpha-olefin copolymer composition, and articles comprising the same

An ethylene/alpha-olefin interpolymer composition suitable for pipe applications prepared via solution polymerization process, and pipes made therefrom. The ethylene/alpha-olefin interpolymer composition suitable for pipe applications according to the present invention comprises greater than 80 percent by weight of units derived from ethylene and 20 percent or less by weight of units derived from one or more alpha olefin co-monomers, wherein said ethylene/alpha-olefin interpolymer has a density in the range of from 0.925 to 0.935 g/cm, a melt index Iin the range of from 0.3 to 1.0 g/10 minutes, a melt flow ratio I/Iin the range of from 7.9 to 11, a melt strength in the range of from 3 to 10 cN, a DSC heat curve having a melting peak temperature in the range of from 120 to 130&#xb0; C., a crystallinity in the range of from 50 to 70 percent, a 1% flexural modulus in the range from 350 to 600 MPa, and a zero shear viscosity ratio (ZSVR) in the range of from 2 to 10.

Ethylene/alpha-olefin interpolymer composition

Growing community of inventors

Tarragona, Spain

Amaia Bastero