Dow Global Technolgoies LLC

Pak-Meng Cham

Mehmet Demirors

Teresa Plumley Karjala

Sarat Munjal

Lonnie G Hazlitt

Christopher R Eddy

Wallace W Yau

Detlef Schramm

Yunwa Wilson Cheung

Thoi H Ho

Kalyan Sehanobish

Pradeep Jain

David W Fuchs

Wolfgang Quack

Julien Damen

Wallace Yau

Compositions suitable for film comprise at least one ethylene/&#x3b1;-olefin interpolymer, wherein the ethylene/&#x3b1;-olefin interpolymer may have, for example, a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship:&#x3e;&#x2212;2002.9+4538.5()&#x2212;2422.2()2.

Compositions of ethylene/&#x3b1;-olefin multi-block interpolymer suitable for films

An ethylenic polymer comprising amyl groups from about 0.1 to about 2.0 units per 1000 carbon atoms as determined by Nuclear Magnetic Resonance and both a peak melting temperature, T, in &#xb0; C., and a heat of fusion, H, in J/g, as determined by DSC Crystallinity, where the numerical values of Tand Hcorrespond to the relationship T&#x2267;(0.2143*H)+79.643. An ethylenic polymer comprising at least one preparative TREF fraction that elutes at 95&#xb0; C. or greater using a Preparative Temperature Rising Elution Fractionation method, where at least one preparative TREF fraction that elutes at 95&#xb0; C. or greater has a gpcBR value greater than 0.05 and less than 5 as determined by gpcBR Branching Index by 3D-GPC, and where at least 5% of the ethylenic polymer elutes at a temperature of 95&#xb0; C. or greater based upon the total weight of the ethylenic polymer.

Long chain branched (LCB), block, or interconnected copolymers of ethylene in combination with one other polymer

Long chain branched (LCB), block or interconnected copolymers of ethylene in combination with one other polymer

Stabilized polyethylene materials which offer an advantageously balanced combination of thermal, mechanical and processing properties, and which maintain their physical properties in chlorinated water environments are disclosed. The materials include an antioxidant system with components to provide extraction resistance in hot water environments and additionally provides oxidation resistance to both chlorine in the water interior of the pipe and oxygen in contact with the pipe's exterior.

Stabilized polyethylene material

The present invention relates to a polyethylene resin having a multimodal molecular weight distribution, said resin being further characterized in that it has a density in the range of from about 0.925 g/ccm to about 0.950 g/ccm, a melt index (I) In the range of from about 0.05 g/10 min to about 5 g/10 min, and in that it comprises at least one high molecular weight (HMW) ethylene interpolymer and at least a low molecular weight (LMW) ethylene polymer, and a composition comprising such resin. Also provided is a shaped article comprising said resin or composition, in particular a pipe.

Multimodal polyethylene material

The present invention relates to a polyethylene resin having a multimodal molecular weight distribution, said resin being further characterized in that it has a density in the range of from about 0.925 g/ccm to about 0.950 g/ccm, a melt index (I) in the range of from about 0.05 g/10 min to about 5 g/10 min, and in that it comprises at least one high molecular weight (HMW) ethylene interpolymer and at least a low molecular weight (LMW) ethylene polymer, and a composition comprising such resin. Also provided is a shaped article comprising said resin or composition, in particular a pipe.

Multimodal polyolefin pipe

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Lake Jackson, TX, United States of America

Pak-Meng Cham