Exxonmobil Chemical Patents Inc.

Virginia Tech Intellectual Properties, Inc.

Chevron Oronite Company LLC

Exxonmobil Research and Engineering Company

Peijun Jiang

Jo Ann M Canich

Armenag Hagop Dekmezian

Pradeep P Shirodkar

Charles Lewis Sims

John Robert Hagadorn

Aspy Keki Mehta

Rainer Kolb

David Raymond Johnsrud

Ramin Abhari

Patrick Brant

Sunny Jacob

Cesar Alberto Garcia-Franco

Jo Ann Marie Canich

Mun Fu Tse

Jianya Cheng

Rhutesh K Shah

Donna Jean Crowther

Narayanaswami R Dharmarajan

Robert Olds Hagerty

Weiqing Weng

Kevin Richard Squire

Periagaram Srinivasan Ravishankar

George Rodriguez

Palanisamy Arjunan

Margaret M Wu

Andy Haishung Tsou

Gabor Kiss

John Richard Shutt

Randall B Laird

Charles Stanley Speed

Sudhin Datta

Francis Charles Rix

Jay L Reimers

Phillip Thomas Matsunaga

John F Walzer, Jr

Abdelhadi Sahnoune

Jingwen Zhang

Alexander I Norman

Peter William Manders

Alexander Z Voskoboynikov

Kenneth Lewtas

Jian Yang

Steven Paul Rucker

Michael A Risch

Caiguo Gong

Catalina L Coker

Sarah J Mattler

Fran A Shipley

Larry Lee Iaccino

David John Lohse

Robert Tan Li

Wen Li

Mark Paul Hagemeister

Jean-Roch H Schauder

Dmitry Vadimovich Uborsky

Yong Yang

Norman Yang

Kevin Bruce Stavens

Adriana S Silva

Charles James Ruff

Georgy Pavlovich Goryunov

Kevin Wayne Lawson

Derek Wade Thurman

Andrew G Narvaez, Jr

Xin Chen

Xiongdong Lian

Patrick J Palafox

Johannes Matthieu Soulages

Mikhail I Sharikov

Liang Li

Liehpao O Farng

Matthew S Bedoya

Maria Dolores Ellul

Catherine Anne Faler

Lisa Saunders Baugh

Timothy Edward Long

Antonios K Doufas

Crisita Carmen H Atienza

Charles J Harlan

Manika Varma-Nair

Andrew Jackson

Jay K Keung

James Norris Coffey

David Michael Fiscus

Margaret T Whalley

Robert P Reynolds

John W Chu

David L Morgan

Shakeel H Tirmizi

Beverly Jean Poole

Alex E Carpenter

Carlos R Lopez-Barron

Steven A Best

Jan Kalfus

Gary L Casty

Viktor Buchholz

Felix M Zacarias

Ying Sun

Donna Sue Davis

Provided is a lubricating oil composition that includes a major amount of a lubricant base oil and a minor amount of a viscosity index improver comprising a syndiotactic propylene-based ethylene-propylene copolymer comprising: a) 2 to 20% by weight of ethylene, b) 80 to 98% by weight of propylene; c) 50 to 99% of rr triads; and d) Mw (LS) of 10 to 250 kg/mol.

Lubricating oil composition with viscosity modifier based on syndiotactic propylene-based ethylene- propylene copolymers with improved properties

It has become desirable to limit or exclude aromatic solvents, such as toluene, from polymerization reactions. For polymerization reactions employing a non-metallocene transition metal complex as a precursor to a polymerization catalyst, exclusion of aromatic solvents may be difficult due to the limited solubility of such complexes in aliphatic hydrocarbon solvents. Aliphatic hydrocarbon solutions suitable for conducting olefin polymerization reactions, particularly solution polymerization reactions, may comprise: a non-metallocene transition metal complex dissolved in an aliphatic hydrocarbon solvent at a concentration ranging from about 2 mM to about 20 mM at 25&#xb0; C. in the presence of an organoaluminum compound. A molar ratio of aluminum of the organoaluminum compound to transition metal of the transition metal complex is about 1:1 or greater, and the organoaluminum compound comprises at least about 8 carbons per aluminum.

Solubility improvement of non-metallocene transition metal complexes in aliphatic hydrocarbon solvents

In some embodiments, ethylene-propylene random copolymers as viscosity modifiers were synthesized with pyridyldiamido catalyst systems and a chain transfer agent. In some embodiments, the present disclosure provides for ethylene-propylene random copolymers having an ethylene content between about 45 wt % and about 55 wt %. In some embodiments, the ethylene-propylene random copolymer is used as a viscosity modifier in a lubricating composition and a fuel composition.

Ethylene-propylene linear copolymers as viscosity modifiers

This invention relates bisindenyl metallocene catalyst compounds having long (at least 4 carbon atoms) linear alkyl groups substituted at the two position and substituted or unsubstituted aryl groups at the four position and process using such catalyst compounds, particularly in the solution process at higher temperatures.

Metallocene catalyst compositions and polymerization process therewith

In some embodiments, ethylene-propylene branched copolymers are synthesized with pyridyldiamido catalysts and a chain transfer agent, and their performance as viscosity modifiers in oil are detailed. In some embodiments, the present disclosure provides for ethylene-propylene branched copolymers having a shear thinning onset of less than about 0.01 rad/s and an HTHS value of less than about 3.3. In some embodiments, the ethylene-propylene branched copolymer is used as a viscosity modifier in a lubricating composition and a fuel composition.

Ethylene-propylene branched copolymers as viscosity modifiers with enhanced fuel economy

This invention relates homogeneous (typically solution) polymerization of propylene and optional olefin comonomer using metallocene catalyst compounds having a 1,5,6,7-tetrahydro-s-indacenyl moiety bridged to another indacenyl moiety or bridged to a substituted or unsubstituted indenyl moiety.

Indacene based metallocene catalysts useful in the production of propylene polymers

The present disclosure provides the use of quinolinyldiamido transition metal complexes, an activator and a metal hydrocarbenyl chain transfer agent, such as an aluminum vinyl-transfer agent, to produce long chain branched propylene polymers.

Long chain branched polypropylene via polymerization with aluminum vinyl transfer agent

The present disclosure provides borate or aluminate activators comprising cations having linear alkyl groups, catalyst systems comprising, and methods for polymerizing olefins using such activators. Specifically, the present disclosure provides activator compounds represented by Formula: [RRREH][MQ], wherein: E is nitrogen or phosphorous; d is 1, 2 or 3; k is 1, 2, or 3; n is 1, 2, 3, 4, 5, or 6; n&#x2212;k=d; Ris C-Clinear alkyl group; each of Rand Ris a C-Clinear alkyl group, a meta- and/or para-substituted phenyl group, an alkoxy group, a silyl group, a halogen, or a halogen containing group, wherein R+R+R&#x2265;15 carbon atoms; M is an element selected from group 13, typically B or Al; and each Q is independently a hydride, bridged or unbridged dialkylamido, halide, alkoxide, aryloxide, hydrocarbyl, substituted hydrocarbyl, halocarbyl, substituted halocarbyl, or halosubstituted-hydrocarbyl radical, provided that when Q is a fluorophenyl group, then Ris not a C-Clinear alkyl group.

Non-coordinating anion type activators containing cation having large alkyl groups

Compositions are provided which include blends of (A) branched and/or bimodal ethylene copolymers and (B) linear ethylene copolymers. The branched and/or bimodal ethylene copolymers may be produced using a dual metallocene catalyst system comprising two different metallocene catalysts: one capable of producing high Mooney-viscosity polymers and one suitable for producing polymers having at least a portion of vinyl terminations. The linear ethylene copolymers may be produced using a metallocene catalyst capable of producing high Mooney-viscosity polymers, which may be the same as such catalyst of the dual metallocene catalyst system. Processes for making such blends, including parallel and/or series polymerization processes, are also provided. The blends may have excellent cure properties suitable in curable rubber compound applications.

Ethylene copolymer blends for cross-linking applications

Processes are provided which include copolymerization using two different metallocene catalysts, one capable of producing high Mooney-viscosity polymers and one suitable for producing lower Mooney-viscosity polymers having at least a portion of vinyl terminations. The two catalysts may be used together in polymerization to produce copolymer compositions of particularly well-tuned properties. For instance, polymerizations are contemplated to produce high-Mooney metallocene polymers that exhibit excellent processability and elasticity, notwithstanding their high Mooney viscosity. Other polymerizations are also contemplated in which lower-Mooney metallocene polymers are produced, which also exhibit excellent processability and elasticity, while furthermore having excellent cure properties suitable in curable elastomer compound applications. Many of the contemplated polymerizations include controlling the ratio of the two metallocene catalysts used in the polymerization so as to obtain the desired Mooney viscosity and desired rheology (indicated by Mooney Relaxation Area) of the copolymer compositions.

Dual metallocene catalyst copolymer compositions

This invention relates to a polymerization process for forming polymer comprising: contacting (typically in a solution or slurry phase), a monomer and a catalyst system in a reaction zone comprising at least one spiral heat exchanger and recovering polymer, wherein the monomer, the catalyst system and the polymer flow through the at least one spiral heat exchanger in a cross-flow direction relative to spirals of the at least one spiral heat exchanger.

Polymerization using a spiral heat exchanger

The present disclosure provides copolymers comprising from about 0.5 wt % to about 25 wt % cyclic olefin content and films comprising the copolymers. In one embodiment, a copolymer includes a C-Cmonomer content of from about 75 wt % to about 99.5 wt %; and a C-Ccyclic olefin comonomer content of from about 0.5 wt % to about 25 wt %. The copolymer has a density of about 0.91 g/cmto about 0.933 g/cm. Films of the present disclosure can have advantageous mechanical properties (such as melt strength) and optical properties (such as haze %).

Cyclic olefin copolymers and films prepared therefrom

The present invention relates to a branched modifier and a composition comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g'of 0.97 or more and an Mw of 20,000 g/mol or more and at least 0.1 wt % of a branched modifier where the modifier has a) a g&#x2032;of 0.70 or less; b) an Mw of 100,000 g/mol or more; c) an Mw/Mn of 4.0 or more; d) a shear thinning ratio of 110 or more, e) a melt strength of 10 cN or more; f) a complex viscosity at 0.1 rad/sec at 190&#xb0; C. of at least 130,000 Pa&#xb7;s; and g) a phase angle of Z&#xb0; or less where Z=138.3G*, where G* is the complex modulus reported in Pascals measured at 190&#xb0; C. and the phase angle units are reported in degrees, wherein the G* is from 1,000 to 1,000,000 Pa.

Modified polyethylene compositions with enhanced melt strength

Disclosed is a solution polymerization process, or, alternatively, a method of delivering powder catalysts to a solution polymerization reactor, comprising combining a homogeneous single-site catalyst precursor with &#x3b1;-olefin monomers to form a polyolefin, wherein the homogeneous single-site catalyst precursor is in the form of (i) a dry powder, (ii) suspended in a aliphatic hydrocarbon solvent, or (iii) suspended in an oil or wax, wherein the homogeneous single-site catalyst precursor is at a concentration greater than 0.8 mmole/liter when suspended in the aliphatic hydrocarbon solvent prior to entering the solution polymerization reactor.

Methods for supplying solid catalysts to a solution polymerization reactor

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League City, TX, United States of America

Peijun Jiang