Univation Technologies, LLC

Exxonmobil Chemical Patents Inc.

Exxon Chemical Patents, Inc.

Christopher R Davey

Rainer Kolb

James McLeod Farley

Aspy Keki Mehta

Agapios Kyriacos Agapiou

Bruce Jon Savatsky

Richard B Pannell

Eric John Markel

Ching-Tai Lue

Main Chang

Weiqing Weng

Armenag Hagop Dekmezian

Palanisamy Arjunan

Chon-Yie Lin

Pawan Kumar Agarwal

Galen Charles Richeson

Charles Stanley Speed

Thomas Craig Erderly

Rajan K Chudgar

Mark P Ossowski

Olivier Jean Georjon

Polymer blends and films made therefrom are provided. The polymer blend can include a first polyethylene having a density of less than about 0.940 g/cm, a melt index (I) greater than 0.75 g/10 min, and a melt index ratio (I/I) of less than 30. The polymer blend can also include a second polyethylene having a density of less than about 0.940 g/cm, a melt index (I) of less than 1 g/10 min, a melt index ratio (I/I) greater than 30, and a molecular weight distribution (Mw/Mn) of less than 4.5.

Polymer blends and films made therefrom

A process for the production of an ethylene alpha-olefin copolymer is disclosed, the process including polymerizing ethylene and at least one alpha-olefin by contacting the ethylene and the at least one alpha-olefin with a metallocene catalyst in at least one gas phase reactor at a reactor pressure of from 0.7 to 70 bar and a reactor temperature of from 20&#xb0; C. to 150&#xb0; C. to form an ethylene alpha-olefin copolymer. The resulting ethylene alpha-olefin copolymer may have a density D of 0.927 g/cc or less, a melt index (I) of from 0.1 to 100 dg/min, a MWD of from 1.5 to 5.0. The resulting ethylene alpha-olefin copolymer may also have a peak melting temperature Tsatisfying the following relation: T&#x3e;D*398&#x2212;245.

Polymerization processes using metallocene catalysts, their polymer products and end uses

Ethylene alpha-olefin copolymers formed by contacting at least one supported metallocene catalyst, ethylene, and an alpha-olefin in a gas phase reactor are disclosed. In some embodiments, the polymer may have: a density of between 0.890 and 0.970 g/cc; a melt index of between 0.7 and 200 dg/min; a melt index ratio of less than 30; an ESCR value of greater than 1000 hours; and a 1% secant modulus of greater than 75,000 psi. In other embodiments, the polymer may have: a density of between 0.930 g/cc and 0.970 g/cc; a melt index of between 10 dg/min and 200 dg/min; a melt index ratio of between 10 and 25; a part weight of greater than 3 g and a part length of greater than 38 cm in a spiral flow test, and; a zero shear viscosity of less than 150 Pa&#xb7;s. Processes to produce these polymers are also disclosed.

Polymers made with metallocene catalysts, for use in rotomolding and injection molding products

The co-polymerization reaction of one or more olefin monomers, such as propylene, with &#x3b1;,&#x3c9;-diene units and the resulting copolymers are provided. More specifically, the copolymer may have from 90 to 99.999 weight percent of olefins and from 0.001 to 2.000 weight percent of &#x3b1;,&#x3c9;-dienes. The copolymer may have a weight average molecular weight in the range from 50,000 to 2,000,000, a crystallization temperature in the range from 115&#xb0; C. to 135&#xb0; C. and a melt flow rate in the range from 0.1 dg/min to 100 dg/min. These copolymers may be employed in a wide variety of applications, the articles of which include, for example, films, fibers, such as spunbonded and meltblown fibers, fabrics, such as nonwoven fabrics, and molded articles. The copolymer may further include at least two crystalline populations. Desirably, the melting point range of one of the crystalline populations is distinguishable from the melting point range of another crystalline population by a temperature range of from 1&#xb0; C. to 8&#xb0; C. More desirably, one of the crystalline populations has a melting point in the range from 152&#xb0; C. to 158&#xb0; C. and another crystalline population has a melting point in the range from 142&#xb0; C. to 148&#xb0; C.

Propylene diene copolymers

Fiber with unique elastic properties comprising copolymer, of ethylene and comonomer, having density in the range of about 0.86 to about 0.93 g/cm.sup.3, MWD in the range of about 2 to about 3.5, melt index in the range of about 4 to about 1000, and SDBI less than about 25.degree. C.

Fibers of polyolefin polymers

Growing community of inventors

Houston, TX, United States of America

Christopher R Davey