Chevron Phillips Chemical Company LP

J Todd Lanier

Qing R Yang

Guylaine St Jean

Elizabeth Mary Lanier

Brooke A Gill

Joel L Martin

Max P McDaniel

Michael D Jensen

Ashish M Sukhadia

Paul J DesLauriers

Matthew G Thorn

Rajendra K Krishnaswamy

Kumudini C Jayaratne

Paul J Deslauriers

Kumudini Jayarante

Max P Mcdaniel

Qing Yang

A first embodiment which is a bimodal polymer having a weight fraction of a lower molecular weight (LMW) component ranging from about 0.25 to about 0.45, a weight fraction of a higher molecular weight (HMW) component ranging from about 0.55 to about 0.75 and a density of from about 0.931 g/cc to about 0.955 g/cc which when tested in accordance with ASTM D1003 using a 1 mil test specimen displays a haze characterized by equation: % Haze=2145&#x2212;2216*Fraction&#x2212;181*a molecular weight distribution of the LMW component (MWD)&#x2212;932*a molecular weight distribution of the HMW component (MWD)+27*(Fraction*MWD)+1019*(Fraction*MWD)+73*(MWD*MWD) wherein fraction refers to the weight fraction of the component in the polymer as a whole.

High clarity low haze compositions

A first embodiment which is a bimodal polymer having a weight fraction of a lower molecular weight (LMW) component ranging from about 0.25 to about 0.45, a weight fraction of a higher molecular weight (HMW) component ranging from about 0.55 to about 0.75 and a density of from about 0.931 g/cc to about 0.955 g/cc which when tested in accordance with ASTM D1003 using a 1 mil test specimen displays a haze characterized by equation: % Haze=2145&#x2212;2216*Fraction&#x2212;181*a molecular weight distribution of the LMW component (MWD)&#x2212;932*a molecular weight distribution of the HMW component(MWD)+27*(Fraction*MWD)+1019*(Fraction*MWD)+73*(MWD*MWD) wherein fraction refers to the weight fraction of the component in the polymer as a whole.

A bimodal polyethylene copolymer comprising a lower molecular weight (LMW) component and a higher molecular weight (HMW) component, the copolymer having a z-average molecular weight (M) of from about 1,000 kg/mol to about 2,500 kg/mol, a weight fraction of the LMW component (LMW fr.) of from about 0.60 to 0.85, a ratio of a weight average molecular weight (M) of the HMW component (HMW M) to a Mof the LMW component (LMW M) of from about 14 to about 25, a zero shear viscosity (&#x3b7;) of from about 5&#xd7;10Pa-s to about 1&#xd7;10Pa-s and a HMW Mof from about 800 kg/mol to about 1,500 kg/mol.

Bimodal resins having good film processability

A polyethylene film comprising a polymer composition having the characteristics of a total energy dart drop, measured in accordance with ASTM D4272, of greater than a bout 0.45 ft.lbf, a dart drop impact strength, measured in accordance with ASTM D1709 Method A, of greater than about 135 g, and a moisture vapor transmission rate, measured in accordance with ASTM F1249 at 100&#xb0; F. and 90% relative. humidity, of less than about 0.85 g-mil/100 square inch/24 hr, wherein said ASTM tests are performed on a test specimen having a 0.8 mil thickness.

Polyethylene film having improved mechanical and barrier properties and method of making same

A multimodal polyethylene composition having at least two polyethylene components, wherein each component has a molecular weight distribution of equal to or less than about 5, one component has a higher molecular weight than the other component, and the higher molecular weight component has an 'a' parameter value of equal to or greater than about 0.35 when fitted to the Carreau-Yasuda equation with n=0.

Multimodal polyethylene compositions and pipe made from same

Growing community of inventors

Bartlesville, OK, United States of America

J Todd Lanier