Exxonmobil Chemical Patents Inc.

Reifenhauser Gmbh & Co Kg Maschinenfabrik

Toray Battery Separator Film Co., Ltd.

Exxonmobil Chemicals Patents, Inc.

Derek Wade Thurman

Antonios K Doufas

Sudhin Datta

Cynthia Ann Mitchell

Jeanne Marie MacDonald

Jerome Sarrazin

Matthew William Holtcamp

David F Sanders

Charles Lewis Sims

Chia Yung Cheng

Rohan A Hule

William Michael Ferry

Kuangyao Brian Peng

Peijun Jiang

Matthew S Bedoya

Detlef Frey

Hans-Georg Geus

Crisita Carmen H Atienza

Charles James Ruff

Abdelhadi Sahnoune

Claudio Cinquemani

Peter Schlag

Rahul Ravindra Kulkarni

Patrick Brant

Wen Li

Alexander I Norman

Daniel Patrick Cherney

Rahul Rameshrao Kulkarni

William Michael Farry

Rahul Ravindra Kulkami

Keith R Green

Cynthia A Mitchell

This invention relates to a catalyst system including the reaction product of a support (such as a fluorided silica support that preferably has not been calcined at a temperature of 400&#xb0; C. or more), an activator and at least two different transition metal catalyst compounds; methods of making such catalyst systems, polymerization processes using such catalyst systems and polymers made therefrom.

Supported catalyst systems and methods of using same

This invention relates to new multimodal and/or broad molecular weight high density polyethylene polymers. The polymers may be made in a single reactor, preferably a gas phase reactor using a dual catalyst system comprising a pyridyldiamido transition metal compound, a metallocene compound, a support, and optionally an activator.

Multimodal and broad molecular weight high density polyethylene

This invention relates to polypropylene fibers and fabrics containing polypropylene fibers, the fibers comprising propylene polymers comprising at least 50 mol % propylene, said polymers having: a) a melt flow rate (MFR, ASTM 1238, 230&#xb0; C., 2.16 kg) of about 10 dg/min to about 25 dg/min; b) a dimensionless Stress Ratio/Loss Tangent Index R[defined by Eq. (8)] at 190&#xb0; C. from about 1.5 to about 30; c) an onset temperature of crystallization under flow, T, (as determined by SAOS rheology, 190&#xb0; C., 1&#xb0; C./min, where said polymer has 0 wt % nucleating agent present), of at least about 123&#xb0; C.; d) an average meso run length determined byC NMR of at least about 55 or higher; and e) optionally, a loss tangent, tan &#x3b4;, [defined by Eq. (2)] at an angular frequency of 0.1 rad/s at 190&#xb0; C. from about 14 to about 70.

Polypropylene fibers and fabrics

This invention relates in one aspect to propylene polymers comprising propylene, said polymers having a melt flow rate (MFR, ASTM 1238, 230&#xb0; C., 2.16 kg) of 10 dg/min to 25 dg/min; a Dimensionless Stress Ratio/Loss Tangent Index Rat 190&#xb0; C. from 1.5 to 28; an average meso run length determined byC NMR of at least 70 or higher; and an MFR MFR Ratio of at least 1.0 and optionally, a Loss Tangent, tan &#x3b4;, at an angular frequency of 0.1 rad/s at 190&#xb0; C. from 14 to 100. The inventive propylene polymer compositions are useful in in molded articles and non-woven fibers and fabrics.

Propylene polymers

This invention relates to propylene polymers comprising at least 50 mol % propylene, said polymers having: a) a melt flow rate (MFR, ASTM 1238, 230&#xb0; C., 2.16 kg) of 10 dg/min to 25 dg/min; b) a Dimensionless Stress Ratio/Loss Tangent Index Rat 190&#xb0; C. from 1.5 to 28; c) an onset temperature of crystallization under flow, T(as determined by SAOS rheology, 190&#xb0; C., 1&#xb0; C./min, where said polymer has 0 wt % nucleating agent present), of at least 131&#xb0; C.; d) an average meso run length determined byC NMR of at least 90 or higher; and e) optionally, a loss tangent, tan &#x3b4;, (defined by Eq. (2)) at an angular frequency of 0.1 rad/s at 190&#xb0; C. from 14 to 70.

Disclosed herein is a nonwoven fabric comprising within the range of from 50 to 99 wt %, by weight of the composition, of a reactor grade propylene-&#x3b1;-olefin copolymer possessing within the range of from 5 to 35 wt %, by weight of the copolymer, of units derived from one or more of ethylene and/or Cto C&#x3b1;-olefins; a melt flow rate (230&#xb0; C./2.16 kg) within the range of from 500 to 7500 g/10 min; and a weight average molecular weight of less than 200,000; and a second polypropylene having a melting point, T, of greater than 110&#xb0; C. and a melt flow rate (230&#xb0; C./2.16 kg) within the range of from 20 to 7500 g/10 min; wherein the fabric has a CD Elongation value of greater than 50% (measuring the fabric of 35 g/mbasis weight). The fabric described herein can be used in structures comprising one or more layers of the fabric described herein, and can include any number of other fabric layers made from other materials.

Process to produce soft polypropylene-based nonwovens

Disclosed herein is a nonwoven fabric comprising within the range of from 1 to 49 wt %, by weight of the fabric, of a reactor grade propylene-&#x3b1;-olefin copolymer possessing; within the range of from 5 to 35 wt %, by weight of the copolymer, of units derived from one or more of ethylene and/or Cto C&#x3b1;-olefins; a melt flow rate (230&#xb0; C./2.16 kg) within the range of from 600 to 7500 g/10 min; and a weight average molecular weight of less than 200,000; and a second polypropylene having a melting point, T, of greater than 110&#xb0; C. and a melt flow rate (230&#xb0; C./2.16 kg) within the range of from 20 to 7500 g/10 min; wherein the fabric has a Handle value of less than 60% (measuring the fabric of 35 g/mbasis weight). The fabric can be used in structures comprising one or more layers of the fabric described herein, and can include any number of other fabric layers made from other materials.

Low molecular weight semicrystalline propylene-alpha olefin copolymers containing propylene crystallinity are used as a nucleating agent in crystalline polypropylene and polypropylene copolymers. The nucleating copolymers are propylene-alpha olefin copolymers having a percent crystallinity of 5-75%, a melting point of 45&#xb0; C.-105&#xb0; C., and an MFR between 300 and 5000 g/10 min. Nucleated polypropylene compositions comprise a nucleating amount of the copolymer blended in a matrix of polypropylene homopolymer, or 0.01 to 9 wt % &#x3b1;-olefin copolymer, having a melting point greater than 110&#xb0; C. The nucleating copolymer improves processing time with little or no effect on the crystallinity-associated characteristics of the matrix. The invention also provides methods of crystallizing polypropylene with the nucleating agent and of forming articles with the composition, and also provides articles formed from the composition and/or by the method.

Isotactic polypropylene nucleation

Extensible polypropylene-based nonwovens

Embodiments of the present invention generally relate to microporous membrane, methods for making microporous membrane, and the use of microporous membrane as battery separator film. More particularly, the invention relates to a microporous polymeric membrane including a paraxylylene polymer or copolymer, particularly in combination with a polymeric microporous membrane. The paraxylylene polymer or copolymer can be formed on or laminated to the microporous polymeric membrane.

Microporous membrane, methods for making such film, and the use of such film as battery separator film

The present invention also discloses a heterogeneous blend composition comprising; a) from 1% to 99% by weight of the blend of a first polymer component comprising a copolymer of 5% to 35% by weight of the first polymer component consisting predominantly of alpha olefin derived units and 65% to 95% by weight of the first polymer component of propylene derived units having a crystallinity of 0.1% to about 25% from isotactic polypropylene sequences, a melting point of from 45&#xb0; C. to 105&#xb0; C., and wherein the Melt Flow Rate (MFR@230&#xb0; C.) of the first polymer component is between 300 g/10 min to 5000 g/10 min b) from 1% to 99% by weight of the blend of a second polymer component comprising isotactic polypropylene and random copolymers of isotactic propylene, wherein the percentage of the copolymerized alpha-olefin in the copolymer is between 0.0% and 9% by weight of the second polymer component and wherein the second polymer component has a melting point greater than about 110&#xb0; C., wherein the first polymer component has less than 1000 ppm of reaction products arising from the chemical reaction of a molecular degradation agent.

Soft heterogeneous isotactic polypropylene compositions

The present invention also discloses a homogeneous blend composition comprising; a) from 1% to 99% by weight of the blend of a first polymer component comprising a copolymer of 5% to 35% by weight of the first polymer component consisting predominantly of alpha olefin derived units and 65% to 95% by weight of the first polymer component of propylene derived units having a crystallinity of 0.1% to about 25% from isotactic polypropylene sequences, a melting point of from 45&#xb0; C. to 105&#xb0; C., and wherein the Melt Flow Rate (MFR @ 230&#xb0; C.) of the first polymer component is between 300 g/10 min to 5000 g/10 min. b) from 1% to 99% by weight of the blend of a second polymer component comprising isotactic polypropylene and random copolymers of isotactic propylene, wherein the percentage of the copolymerized alpha-olefin in the copolymer is between 0.0% and 9% by weight of the second polymer component and wherein the second polymer component has a melting point greater than about 110&#xb0; C., wherein the first polymer component has less than 1000 ppm of reaction products arising from the chemical reaction of a molecular degradation agent.

Soft homogeneous isotactic polypropylene compositions

Growing community of inventors

Houston, TX, United States of America

Derek Wade Thurman