Dow Global Technolgoies LLC

Nilesh R Savargaonkar

Mehmet Demirors

Teresa Plumley Karjala

Jian Jim Wang

Selim Bensason

Lawrence J Effler, Jr

John W Garnett, Iv

Rajen M Patel

Sylvie Y Desjardins

Zhe Zhou

Brad A Cobler

Lori L Kardos

Jill M Martin

Ayush A Bafna

Cristina Serrat

Wallace W Yau

Michael D Read

Jose Ortega

Hoang T Pham

Vivek Kalihari

Gregory M Bunker

Hyunwoo Kim

Jian Wang

Wallace Yau

John W Garnett

Teresa P Karjala

Sylvie Desjardins

Lawrence J Effler

Carlos G Alfonzo

Meaghan M Woodward

Mono- and multi-layer films comprising a polyethylene composition which comprises the reaction product of ethylene and optionally one or more alpha olefin comonomers in the presence of a catalyst composition comprising a multi-metallic procatalyst via a solution polymerization process in at least one reactor; wherein said polyethylene composition is characterized by one or more of the following properties: a melt index, I, measured according to ASTM D 1238 (2.16 kg @ 190&#xb0; C.), from 0.1 to 5 g/10 min; density, measured according to ASTM D-792, from 0.910 to 0.935 g/cc; melt flow ratio, I/I, wherein Iis measured according to ASTM D1238 (10 kg @ 190&#xb0; C.), from 6 to 7.4; and molecular weight distribution, (M/M) from 2.5 to 3.5 are provided. Also provided are articles made from the mono- and/or multi-layer films.

Mono- and multi-layer films and articles made therefrom

The instant invention provides a polyethylene blend-composition suitable for blown films, and films made therefrom. The polyethylene blend-composition suitable for blown films comprises the melt blending product of: (a) from 0.5 to 4 percent by weight of a low density polyethylene having a density in the range of from 0.915 to 0.935 g/cm, and a melt index (I) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (M/M) in the range of from 6 to 10; (b) 90 percent or greater by weight of an ethylene/&#x3b1;-olefin interpolymer composition, wherein ethylene/&#x3b1;-olefin interpolymer composition has a Comonomer Distribution Constant (CDC) in the range of from 75 to 200, a vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the ethylene/&#x3b1;-olefin interpolymer composition; a zero shear viscosity ratio (ZSVR) in the range from 2 to 20; a density in the range of from 0.903 to 0.950 g/cm, a melt index (I) in a range of from 0.1 to 5 g/10 minutes, a molecular weight distribution (M/M) in the range of from 1.8 to 3.5; (c) optionally a hydrotalcite based neutralizing agent; (d) optionally one or more nucleating agents; (e) and optionally one or more antioxidants.

Polyethylene blend-composition suitable for blown films, and films made therefrom

Mono- and multi-layer films comprising a polyethylene composition which comprises the reaction product of ethylene and optionally one or more alpha olefin comonomers in the presence of a catalyst composition comprising a multi-metallic procatalyst via a solution polymerization process in at least one reactor; wherein said polyethylene composition is characterized by one or more of the following properties: a melt index, I, measured according to ASTM D 1238 (2.16 kg@190&#xb0; C.), from 0.1 to 5 g/10 min; density, measured according to ASTM D-792, from 0.910 to 0.935 g/cc; melt flow ratio, I/I, wherein Iis measured according to ASTM D1238 (10 kg@190&#xb0; C.), from 6 to 7.4; and molecular weight distribution, (M/M) from 2.5 to 3.5 are provided. Also provided are articles made from the mono- and/or multi-layer films.

The instant invention provides a polyethylene blend-composition suitable for blown films, and films made therefrom. The polyethylene blend-composition suitable for blown films according to the present invention comprises the melt blending product of: (a) from 0.5 to 4 percent by weight of a low density polyethylene having a density in the range of from 0.915 to 0.935 g/cm, and a melt index (I) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (M/M) in the range of from 6 to 10; (b) 90 percent or greater by weight of a linear low density polyethylene composition has a density in the range of 0.900 to 0.935 g/cm, a molecular weight distribution (M/M) in the range of 1.5 to 4.5, a melt index (I) in the range of 0.1 to 5 g/10 minutes, a molecular weight distribution (M/M) in the range of less than 3, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of said composition, and a zero shear viscosity ratio (ZSVR) in the range from 1 to less than 2; (c) optionally a hydrotalcite based neutralizing agent; (d) optionally one or more nucleating agents; (e) and optionally one or more antioxidants.

An ethylene/&#x3b1;-olefin copolymer comprising units derived from ethylene; and units derived from at least one &#x3b1;-olefin; wherein the ethylene/&#x3b1;-olefin copolymer has a density in the range of from 0.90 to 0.94 g/cc; a melt index (I) in the range of from 0.05 to 50 dg/min; an Mw/Mn of from 3 to 5; and from 300 to 500 vinyl unsaturations per 1,000,000 carbon atoms in the ethylene/&#x3b1;-olefin copolymer is provided. Also provided is a process for producing an ethylene/&#x3b1;-olefin copolymer comprising: (1) polymerizing ethylene and one or more &#x3b1;-olefins in a polymerization reactor; (2) thereby producing an enhanced melt strength ethylene/&#x3b1;-olefin copolymer having from 300 to 500 vinyl unsaturation units per 1,000,000 carbon atoms, a density in the range of from 0.90 to 0.94 g/cc; a melt index (I) in the range of from 0.05 to 50 dg/min; and a Mw/Mn of from 3 to 5.

Process to produce enhanced melt strength ethylene/alpha-olefin copolymers and articles thereof

Process to produce enhanced melt strength ethylene/&#x3b1;-olefin copolymers and articles thereof

The instant invention provides a polyethylene blend-composition suitable for blown films, and films made therefrom. The polyethylene blend-composition suitable for blown films according to the present invention comprises the melt blending product of: (a) from 0.5 to 6 percent by weight of a bimodal linear low density polyethylene having a density in the range of from 0.935 to 0.970 g/cm, and a melt index (I) in the range of from 0.3 to 5 g/10 minutes; (b) 90 percent or greater by weight of a monomodal linear low density polyethylene having a density in the range of from 0.910 to 0.950 g/cm3, and a melt index (I) in the range of from 0.1 to less than or equal to 5 g/10 minutes; (c) optionally from 0.5 to 4 percent by weight of a low density polyethylene having a density in the range of from 0.915 to 0.935 g/cm3, and a melt index (I) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (M/M) in the range of from 6 to 10; (d) optionally a hydrotalcite based neutralizing agent; (e) optionally one or more nucleating agents; and (f) optionally one or more antioxidants.

The instant invention provides a polyethylene blend composition suitable for blown film, method of producing the same, and films made therefrom. The polyethylene blend composition suitable for blown film according to the present invention comprises the melt blending product of: (a) less than or equal to 4 percent by weight of a low density polyethylene (LDPE) having a density in the range of from 0.915 to 0.935 g/cm, and a melt index (I) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (M/M) in the range of from 6 to 10; (b) 90 percent or greater by weight of a heterogenous linear low density polyethylene (hLLDPE) having a density in the range of from 0.917 to 0.950 g/cm, and a melt index (I) in the range of from 0.1 to less than or equal to 5 g/10 minutes; (c) optionally a hydrotalcite based neutralizing agent; (d) optionally one or more nucleating agents; and (e) optionally one or more antioxidants. When the polyethylene blend-composition is formed into a film via blown film process, the output rate is improved at least 6 percent relative to a similar linear low density polyethylene.

Polyethylene blend composition suitable for blown film, method of producing the same, and films made therefrom

An ethylene-based polymer characterized as having a density from about 0.9 to about 0.94 grams per cubic centimeter, a molecular weight distribution (M/M) from about 8 to about 30, a melt index (I) from about 0.1 to about 50 grams per 10 minutes, a gpcBR value greater than 1.4 as determined by a gpcBR Branching Index and a Y value less than about 2 is disclosed. This ethylene-based polymer is especially useful for blending with other polymers such as LLDPE. When converting the blends into film, especially blown film, bubble stability and output is increased.

LDPE enabling high output and good optics when blended with other polymers

Growing community of inventors

Pearland, TX, United States of America

Nilesh R Savargaonkar