Exxonmobil Chemical Patents Inc.

Exxon Chemical Patents, Inc.

The Yokohama Rubber Co., Ltd.

Ramot at Tel-aviv University Ltd.

Advanced Elastomer Systems, L.p.

Zurn Pex, Inc.

Exxonmobil Research and Engineering Company

Exxonmobil Technology and Engineering Company

Bruce Alan Harrington

Sudhin Datta

Charles C Cozewith

David John Lohse

George Rodriguez

Phillip Thomas Matsunaga

Kevin Bruce Stavens

Donna Jean Crowther

Periagaram Srinivasan Ravishankar

Kenneth Lewtas

Mark Paul Hagemeister

Bryan Robert Chapman

Smita Kacker

Charles James Ruff

John F Walzer, Jr

Matthew William Holtcamp

Patrick Brant

Abhimanyu Onkar Patil

Margaret M Wu

Andy Haishung Tsou

Edward John Blok

Robert J Wittenbrink

Anthony Jay Dias

Mun Fu Tse

Gregory S Day

Eric John Markel

Garth Ronald Giesbrecht

Yuichi Hara

Douglas Edward Deckman

David B Dunaway

Jean M Tancrede

Weiguo Hu

Craig Janzen Emett

Vetkav Rajagopalan Eswaran

Anthony George Karandinos

Keith A Nelson

Olivier J F Georjon

Bernard J Folie

Robert F Bahm

Jo Ann Canich

Palanisamy Arjunan

Chon-Yie Lin

Moshe Kol

Sabet Abdou-Sabet

Cesar Alberto Garcia-Franco

Shusaku Tomoi

Bruce R Lundmark

Catalina L Coker

Natalie Ann Merrill

George James Pehlert

Donald Sheley Tracey

Wenning W Han

Konstantin Press

Chon Yie Lin

Michael Glenn Williams

Pramod Jayant Nandapurkar

Srivatsan Srinivas Iyer

Gary Lee Runyan

Kent Leon Chasey

Rui Zhao

Gerd Arthur Allermann

Scott K Jackson

Robert G Russell

Paul E Rollin, Jr

Kevin J Kelly

Rodney Mize

Gregory G Hlatkey

Narayanaswami Raja Dharmarajan

Olivier J Georjon

Vetkav R Eswaran

Cohn-Yie Lin

Richard W Martin

Tomoi Shusaku

P S Ravishankar

This invention is directed to a poly alpha olefin (PAO) composition formed in a first oligomerization, wherein at least portions of the PAO have properties that make them highly desirable for a subsequent oligomerization. A preferred process for producing this PAO uses a single site catalyst at high temperatures without adding hydrogen to produce a low viscosity PAO with excellent Noack volatility at high conversion rates. This PAO comprises a dimer product with at least 25 wt % tri-substituted vinylene olefins wherein said dimer product is highly desirable as a feedstock for a subsequent oligomerization. This PAO also comprises trimer and optionally higher oligomer products with outstanding properties that make these products useful as lubricant basestocks following hydrogenation.

Poly alpha olefin compositions

A stabilized, dynamically vulcanized thermoplastic elastomer composition comprising dispersed dynamically vulcanized particles of at least one first elastomer or rubber comprising halogenated isobutylene-containing elastomer and dispersed particles of at least one second elastomer or rubber comprising at least one functional group capable of reacting with and grafting to a polyamide, the particles of the at least one first and at least one second elastomers dispersed in a continuous thermoplastic polyamide or nylon resin matrix comprising at least one nylon homopolymer, nylon copolymer or mixture thereof, the composition or the at least one first elastomer further comprising at least one stabilizer against degradation induced by exposure to actinic, particularly ultraviolet, radiation. The compositions are preferably produced in a mixing extruder and are suitable for producing durable, flexible, thermoplastic elastomer fluid barrier films or layers useful in industrial articles such as vehicle tire innerliners and hoses.

Stabilized dynamically vulcanized thermoplastic elastomer compositions useful in fluid barrier applications

Poly alpha olefins (PAOs) are characterized by very low viscosity and excellent Noack volatility. A preferred process for synthesizing said PAOs involves first oligomerizing low molecular weight linear alpha olefins in the presence of a single site catalyst at high temperatures without adding hydrogen and then subsequently oligomerizing at least a portion of the product from the first step in the presence of an oligomerization catalyst.

Polyalphaolefins and Salan catalysts, catalyst systems, and processes to produce the polyalphaolefins. Also disclosed are high-viscosity index polyalphaolefins and processes for producing them.

Polyalphaolefins prepared using modified Salan catalyst compounds

This invention is directed to a two-step process for the preparation of improved poly alpha olefins wherein the first step involves oligomerizing low molecular weight linear alpha olefins in the presence of a single site catalyst and the second step involves oligomerization of at least a portion of the product from the first step in the presence of an oligomerization catalyst. The dimer product from the first oligomerization is characterized by a tri-substituted vinylene olefin content of at least 25 wt %.

Process to produce improved poly alpha olefin compositions

A method for producing a high strength, flexible crosslinked polyethylene (PEX) material is provided wherein the base polymer is intermixed with a polymer modifier which affects the amorphous region of the polymer, leaving the crystalline portion of the base polymer virtually unaffected. Consequently, the amorphous region's density is lowered, resulting in a more flexible final product, while the crosslinked molecular structure and/or crystalline portion of the polymer, which controls the strength of the base polymer, remains strong. The polymer modifier can comprise a hydrocarbon fluid such as PAO, Group III basestocks, or a gas-to-liquid hydrocarbon. The plastic material has particular utility in the production of tubing, piping, and conduits for transporting gases, liquids, and the like, as well as wire and cable coatings such as jacketing and insulation.

Crosslinked polyethylene process

This invention is directed to new mono-cyclopentadienyl ('mono-Cp') metallocene catalyst compounds useful for producing high viscosity PAOs with narrow molecular weight distribution and good shear stability. Specifically, this invention relates to a group of bridged mono-Cp catalysts wherein, in an embodiment of the invention, the aromatic ring structure is substituted with: 1) at least one phenyl group, 2) at least one alkyl group, and 3) at least one other group, such as a hydrocarbyl group, a heteroatom, or a heteroatom-containing group.

Catalysts for producing polyalpha-olefins and processes related thereto

A method for forming a fiber, the method comprising charging to a reactive extruder a first polymer and a second polymer to form an initial blend, where the first polymer is a propylene-based elastomer including up to 35% by weight ethylene-derived units and a heat of fusion, as determined according to DSC procedures according to ASTM E-793, of less than 80 J/g and a melt temperature of less than 110&#xb0; C., where the second polymer is a propylene-based polymer having a melt temperature in excess of 110&#xb0; C. and a heat of fusion in excess of 80 J/g, and introducing the reactive blend to a spinneret to form a fiber or extruding the reacted blend through a plurality of die capillaries to form molten threads or filaments which are attenuated in a gas stream to form meltblown fibers.

Process for forming polymer blends

Ethylene propylene copolymers, substantially free of diene, are described. The copolymers will have a uniform distribution of both tacticity and comonomer between copolymer chains. Further, the copolymers will exhibit a statistically insignificant intramolecular difference of tacticity. The copolymers are made in the presence of a metallocene catalyst.

Propylene ethylene polymers and production process

This invention relates to a film or sheet and a process to make a film or sheet having a thickness of 0.5 to 35 mils comprising a blend composition comprising: a) 4 to 50 wt % of one or more polypropylene-based TPO(s); and b) 30 to 80 wt % of one or more ethylene plastomer(s); and c) 0.5 to 35 wt % of one or more non-functionalized plasticizer(s) having a kinematic viscosity at 100&#xb0; C. of 4 to 300 cSt, a pour point of &#x2212;20&#xb0; C. or less, and a flash point of 200&#xb0; C. or more; and d) 0 to 69.5 wt % of one or more filler(s); and wherein the blend composition is calendered into a film or sheet.

Calendered films of plasticized blends of plastomer and impact copolymer

This invention relates to a polymer composition comprising: 70 wt % to 99.5 wt % of a nitrile-group containing elastomer, wherein the elastomer has: a Mooney Viscosity of 15 to 115 MU; and a nitrile monomer content of 0.5 wt % to 50 wt %; and 0.5 wt % to 30 wt % of a non-functionalized plasticizer (NFP), wherein the NFP has: a kinematic viscosity at 100&#xb0; C. of 4 to 1000 cSt, a flash point of &#x2267;200&#xb0; C., a viscosity index of &#x2267;120, and a specific gravity of &#x2266;0.865; and wherein the composition has: a 25% compression set at 70 hours and &#x2212;30&#xb0; C. that is at least 110% of the 25% compression set of same composition without the NFP tested at the same conditions, and a retained tensile strength, in MPa, after 168 hours at 175&#xb0; C., that is at least about 88% of the retained tensile strength of the same composition that has not been aged.

Modifiers for nitrile containing elastomers

An adhesive blend is described that can include a semi-crystalline copolymer of propylene and at least one comonomer selected from the group consisting of ethylene and at least one Cto C&#x3b1;-olefin, the copolymer having a weight average molecular weight (Mw) from about 15,000 to about 200,000; an melt index (MI) from about 7 dg/min to about 3000 dg/min as measured by ASTM D 1238 (B), and a (Mw/Mn) of approximately 2. Various production processes are also described. Also described are adhesive compositions and methods for making adhesive compositions having polymers or polymer blends with melt flow rates (MFRS) equal to and above 250 dg/min. at 230&#xb0;C. Certain specific embodiments of the invention involve the use of a free radical initiator, e.g., a peroxide.

Polypropylene-based adhesive compositions

A method for forming a polymer blend, the method comprising charging to a reactive extruder a first polymer and a second polymer to form an initial blend, where the first polymer is a propylene-based elastomer including up to 35% by weight ethylene-derived units and a heat of fusion, as determined according to DSC procedures according to ASTM E-793, of less than 80 J/g and a melt temperature of less than 110&#xb0; C., where the second polymer is a propylene-based polymer having a melt temperature in excess of 110&#xb0; C. and a heat of fusion in excess of 80 J/g.

Nonwoven fabrics and methods for making the same are described, wherein the fabrics comprise two or more propylene-based elastomers in combination with one or more propylene-based thermoplastic polymers. Specifically, the first propylene-based elastomer comprises at least 7% by weight ethylene or non-propylene alpha-olefin units, the second propylene-based elastomer comprises less than 7% by weight ethylene or non-propylene alpha-olefin units, the first and second propylene-based elastomers each have a heat of fusion less than 80 J/g, and the propylene-based thermoplastic polymer has a heat of fusion greater than 80 J/g.

Fibers and non-wovens prepared with propylene-based elastomers

Growing community of inventors

Houston, TX, United States of America

Bruce Alan Harrington