Exxonmobil Chemical Patents Inc.

Exxon Research and Engineering Company

Exxonmobil Research and Engineering Company

Exxon Chemical Patents, Inc.

Exxon Production Research Company

Exxonmobil Upstream Research Company

Exxonmobile Research and Engineering Company

Pamela Jean Wright

Dennis G Peiffer

Timothy D Shaffer

Christine A Costello

Michael F McDonald, Jr

Andy Haishung Tsou

Johannes Matthieu Soulages

Michael F Mcdonald

David Y Chung

Karla Schall Colle

Robert Norman Webb

Larry D Talley

Nikos Hadjichristidis

Joseph Anthony Sissano

Manese Rabeony

Deborah J Davis

Pradeep P Shirodkar

Hsien-Chang Wang

Kenneth Lewtas

David John Lohse

Thomas T Sun

Lewis J Fetters

Rebecca L Rucker

Louise M Wheeler

Robert D Lundberg

Jacob I Emert

Donald N Schulz

Limin Song

Edward N Kresge

Jianya Cheng

Russell H Oelfke

Timothy Daniel Shaffer

Adriana S Silva

Arnold Lustiger

David Michael Fiscus

Hsien C Wang

Yu Feng Wang

Alexander I Norman

Chester W Elspass

Suzzy Chen Hsi Ho

Richard Dwight Hembree

James Joseph Chludzinski

Anne Vera Macedo

Madhavi Vadlamudi

Quoc Luvinh

Richard Cheng-Ming Yeh

Ralph Howard Schatz

George Akehurst

Leming Gu

Joseph A Maier

Paul Edward Schuenzel

Antonio G Lazarus

Joseph Jacques Ripet

Lawrence D Talley

J Davis Deborah

Richard C M Yeh

Scott T Milner

Richard E Baud

Jean-Pierre Courseaux

Deborah Jean Davis

In some embodiments, the present disclosure provides a composition comprising 1) about 97.5 wt % to about 99.9 wt % of a first polyethylene having a density of about 0.91 g/cmto about 0.94 g/cm, and a melt strength of about 10 mN or greater; and 2) about 0.1 wt % to about 2.5 wt % of a second polyethylene having an Mw of about 500,000 g/mol or more. In some embodiments, the composition is a film. In some embodiments, the present disclosure provides a method of making a composition comprising blending a first polyethylene of any embodiment described herein and a second polyethylene of any embodiment described herein.

Enhanced processability of LLDPE by addition of ultra-high molecular weight density polyethylene

A system for producing a functionalized olefinic-based polymer, the system comprising a polymerization zone for producing an olefinic-based polymer comprising a mixing section, a deliquifying section, and a quenching section, wherein at least one section of the polymerization zone has a defined cross-sectional area that continually decreases from a first end to a second end of said section; a devolatilization zone comprising a kneader or extruder, wherein said devolatilization zone is downstream of said polymerization zone and in fluid communication with said polymerization zone; and a functionalization zone downstream of said devolatilization zone and in fluid communication with said devolatilization zone.

System and process for the production of functionalized olefinic-based polymer

The present invention relates to polyethylene compositions comprising one or more ethylene polymers and one or more dendritic hydrocarbon polymer modifiers, in particular, this invention further relates to polyethylene blends comprising one or more ethylene polymers and one or more dendritic hydrocarbon polymer modifiers, wherein the modifier has: 1) a g' value less than 0.75; 2) a Cayley tree topology with a layer number of 2 or more more; and 3) a average Mw between the branch points of 1,500 g/mol or more.

Modified polyethylene film compositions

Provided are blends of branched hydrocarbon comb polymers having tailored branching and molecular weight parameters, with substantially linear polymers. Such blends have been found to have improved extensional rheological properties, while maintaining nearly the viscosity of the substantially linear polymers. The blends of the hydrocarbon comb polymers with the substantially linear polymers thus maintain the extrusion processing characteristics of the linear polymer alone, but have improved extensional flow processability, with strain hardening ratios (SHR) greater than 1. The blends are effective in blown film processing. Also disclosed are related methods for improving extensional flow processability using the branched hydrocarbon comb polymers, as well as the branched hydrocarbon comb polymers themselves, including as a property enhancing additive for such substantially linear polymers.

Branched saturated hydrocarbon polymers as extensional rheology modifiers without impacting shear properties

A process for making a substantially saturated dendritic hydrocarbon polymer. The process has the following steps: (a) polymerizing an amount of a first alkadiene monomer under anionic conditions in the presence of a first organic monolithium initiator to produce a linear polyalkadiene having a lithiated chain end; (b) reacting the linear polyalkadiene with an amount of a second organic monolithium initiator in the presence of tetramethylethylene diamine to form a multilithiated polyalkadiene; (c) reacting the multilithiated polyalkadiene with an amount of a second alkadiene monomer to form a branched polyalkadiene; (d) repeating steps (b) and (c) with the branched polyalkadiene one or more times to prepare a dendritic polyalkadiene; and (e) hydrogenating the dendritic polyalkadiene to form the substantially saturated dendritic hydrocarbon polymer.

Process for making a saturated dendritic hydrocarbon polymer

Method of reducing fouling in an elastomer polymerization process that includes providing a reactor capable of housing an industrial-scale elastomer polymerization reaction, and applying a mechanical force to the reactor so as to create a vibration in at least one wall of the reactor, in which fouling is reduced in the reactor. In one embodiment the reaction is an industrial scale butyl polymerization reaction and the reactor is a butyl polymerization reactor.

Mitigation of elastomer reactor fouling using mechanical vibration

Provided is a process for making a saturated star hydrocarbon polymer. The process has the following steps: (A) hydrosilylating tetraethylene silicon with methyldichlorosilane in the presence of a hydrosilylating catalyst to form a chlorosilane dendrimer; (B) reacting the chlorosilane dendrimer with vinylmagnesium bromide in the presence of a lithium and/or organolithium initiator stepwise to build a higher generation chlorosilane dendrimer; (C) anionically polymerizing polybutadiene in the presence of a lithium and/or organolithium initiator to form living poly(butadienyl)lithium; (D) attaching the living poly(butadienyl)lithium to the higher generation dendrimer to form a star polybutadiene; and (E) hydrogenating the star polybutadiene to form the saturated star hydrocarbon polymer. There is also provided a saturated star hydrocarbon polymer made according to the above process and a polymer composition of a matrix ethylene polymer and the saturated star hydrocarbon polymer.

Star hydrocarbon polymer, process for making, and a polymer blend composition having same

The disclosure provides for a process and polymerization system to produce isoolefin polymers () utilizing polymorphogenates () in the catalyst system to control polydispersity (MWD). The disclosure also provides a catalyst system () comprising a plurality of active catalyst complex species () formed by combination of a Lewis acid (), an initiator () and a polymorphogenate (), as well as polymers made using the catalyst system or process. The polymorphogenate () can promote or mimic the formation of different active catalyst complex species () having different polymerization rates, i.e. different rates of propagation, chain transfer, or termination, as observed by different polydispersities resulting from the presence of relatively different proportions of the polymorphogenate.

Polydispersity-controlled isoolefin polymerization with polymorphogenates

The method of polymerization includes the steps of a) providing a catalyst system, b) providing at least one monomer or comonomer mixture in a reaction vessel, c) introducing the catalyst into the reaction vessel, and d) polymerizing the at least one monomer or comonomer mixture to produce an isoolefin polymer. The catalyst may be soluble in the diluent used for polymerization. The polymerization contact surfaces of the reaction vessel have an arithmetic average surface roughness of less than 0.3 &#x3bc;m (12 microinches).

Method for reducing depositions in polymerization vessels

The disclosure provides a slurry polymerization system and method to decrease polymer deposition on reactor surfaces using an oxygenate such as alcohol () supplied to the polymerization medium () separate from the catalyst feed ().

Method and apparatus for decreasing polymer deposition

Graft copolymers having cationic units pendant to the backbone chain are disclosed. These polymers are prepared by reacting a polymer containing halogenated para-methylstyrene units in the chain, e.g., a brominated copolymer of isobutylene and para-methylstyrene, with an anionically polymerized polymer made using an organolithium initiator compound having the formula R R Z R &mdash;Li where R and R are alkyl radicals, R is a direct link or an organic radical and Z is nitrogen or phosphorous. Reaction of the anionically polymerized polymer having an R R Z R &mdash; end group with the halogenated polymer leads to graft polymers coupled by a quaternary ammonium or phosphonium groups.

Graft copolymers containing ionomer units

A method for inhibiting the formation of gas hydrates in a petroleum fluid having hydrate-forming constituents is claimed. More specifically, the method can be used to treat a petroleum fluid, such as natural gas conveyed in a pipe, to inhibit the formation of a hydrate flow restriction in the pipe. The hydrate inhibitors used for practicing the method comprise substantially water soluble homopolymers and copolymers of surfactant monomers, wherein the surfactant monomer unit may be represented by the formula:

Method for inhibiting hydrate formation

This invention relates to an adhesive composition comprising a copolymer comprising units derived from one or more macromonomers and an unsaturated acid or an unsaturated anhydride wherein the weight average molecular weight of the copolymer is at least twice the weight average molecular weight of the macromonomer, the melt index of the copolymer is 1 dg/min or more, and wherein the macromonomer:

Adhesives comprising copolymers of macromonomers and unsaturated acids

A copolymer comprising units of an unsaturated dicarboxylic monomer and an ethylene .alpha.-olefin macromer is disclosed. The macromer is an unsaturated ethylene .alpha.-olefin polymer comprising units of from ethylene and at least one .alpha.-olefin represented by the formula CH.sub.2 .dbd.CHR.sup.a, wherein R.sup.a is a C.sub.1 to C.sub.18 linear alkyl group or a C.sub.3 to C.sub.18 branched alkyl group; the ethylene .alpha.-olefin polymer has a number average molecular weight of from about 500 to about 100,000; and at least about 30% of the unsaturation in the ethylene .alpha.-olefin polymer is terminal vinylidene. The copolymer has a carbon-carbon backbone and contains succinic groups and hydrocarbyl groups. The copolymer can be derivatized by reaction with nucleophilic reactants including monoamines, polyamines, monoalcohols, polyols, amino alcohols, reactant metal compounds and mixtures thereof. The derivatized copolymers can be post-treated (e.g., borated) with one or more post-treating agents (e.g., boric acid). The copolymer, its derivatives, and post-treated derivatives are useful as additives (e.g., dispersants and viscosity index improvers) in fuels and in lubricating oils.

Copolymers of ethylene .alpha.-olefin macromers and dicarboxylic

Growing community of inventors

Easton, PA, United States of America

Pamela Jean Wright