Chevron Phillips Chemical Company LP

Union Carbide Chemicals & Plastics Technology Corporation

Chevron Philips Chemical Company, LP

Guylaine St Jean

Qing R Yang

Ashish M Sukhadia

Max P McDaniel

Errun Ding

Chung Ching Tso

Mark L Hlavinka

Daniel G Hert

Brooke A Gill

Paul J DesLauriers

Albert P Masino

Richard M Buck

Elizabeth Mary Lanier

J Todd Lanier

Yongwoo Inn

Lili Cui

William James Michie, Jr

Lloyd W Guatney

Joel L Martin

Robert J Jorgensen

Steven J Secora

Christopher E Wittner

Deloris R Gagan

Cliff Robert Mure

Jerry T Lanier

Stephen Paul Jaker

George E Ealer

Paul J Deslauriers

Karen E Breetz

Jim H Addcox

Jon D Ratzlaff

Diane J Rickman-Davis

Charles J Sakevich

Max P Mcdaniel

Karen Breetz

Qing Yang

An ethylene alpha-olefin copolymer having (a) a density of from about 0.910 g/cc to about 0.940 g/cc; (b) a weight average molecular weight of from about 150,000 g/mol to about 300,000 g/mol; and (c) a melt index at a load of 2.16 kg of from about 0.01 dg/10 min. to about 0.5 dg/min.; wherein a 1 mil blown film formed from the polymer composition is characterized by (i) a Dart Impact strength greater than about 175 g/mil; (ii) an Elmendorf machine direction tear strength greater than about 20 g/mil; and (iii) an Elmendorf transverse direction tear strength greater than about 475 g/mil.

Medium density polyethylene compositions

Disclosed herein are ethylene-based polymers produced using dual metallocene catalyst systems. These polymers have low densities, high molecular weights, and broad molecular weight distributions, as well as having the majority of the long chain branches in the lower molecular weight component of the polymer, and the majority of the short chain branches in the higher molecular weight component of the polymer. Films produced from these polymers have improved impact and puncture resistance.

Low density polyolefin resins with low molecular weight and high molecular weight components, and films made therefrom

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

Disclosed herein are polymerization processes for the production of olefin polymers. These polymerization processes can employ a catalyst system containing two or three metallocene components, resulting in ethylene-based copolymers that can have a medium density and improved stress crack resistance.

Higher density polyolefins with improved stress crack resistance

Disclosed herein are broad molecular weight distribution olefin polymers having densities in the 0.895 to 0.930 g/cmrange, and with improved impact and tear resistance. These polymers can have a ratio of Mw/Mn in the 8 to 35 range, a high load melt index in the 4 to 50 range, less than about 0.008 LCB per 1000 total carbon atoms, and a reverse comonomer distribution.

Low density polyolefin resins and films made therefrom

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 polymer having a melt index of from about 0.5 g/10 min to about 4.0 g/10 min and a density of equal to or greater than 0.96 g/cc which when formed into a 1-mil film displays a moisture vapor transmission rate ranging from equal to or greater than about 0 to equal to or about 20% greater than X where X=k{&#x2212;61.95377+39.52785(M/M)&#x2212;8.16974(M/M)+0.55114(M/M)}+k{&#x2212;114.01555(&#x3c4;)+37.68575(M/M)(&#x3c4;)&#x2212;2.89177(M/M)(&#x3c4;)}+k{120.37572(&#x3c4;)&#x2212;25.91177(M/M)(&#x3c4;)}+k{18.03254(&#x3c4;)} when Mis from about 100 kg/mol to about 180 kg/moL; Mis from about 300 kg/mol to about 1000 kg/mol; &#x3c4; is from about 0.01 S to about 0.35 s; kis 1 g/100 in&#xb7;day; kis 1 g/100 in&#xb7;day&#xb7;s; kis 1 g/100 in&#xb7;day&#xb7;s; and kis 1 g/100 in&#xb7;day&#xb7;s.

Polymer compositions having improved barrier properties

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Bartlesville, OK, United States of America

Guylaine St Jean