Exxonmobil Chemical Patents Inc.

Exxonmobile Chemical Patents Inc.

Robert Norman Webb

Michael F Mcdonald

Michael Francis McDonald

Michael F McDonald, Jr

Scott T Milner

David Yen-Lung Chung

Scott Thomas Milner

Weiqing Weng

Timothy Daniel Shaffer

Timothy D Shaffer

John Patrick Soisson

David Y Chung

Michael Brendan Rodgers

Richard Dwight Hembree

Kenneth W Powers

Michael Gerard Matturro

James Peter Stokes

Pamela Jean Wright

Molly Westermann Johnston

Deborah J Davis

Ralph Howard Schatz

Yuan-Ju (Ray) Chen

Michael B Rodgers

Ramesh Varadaraj

Anthony Jay Dias

Sunny Jacob

David John Lohse

Cornelius Hendrick Brons

Walter Harvey Waddell

Caiguo Gong

Donald Sheley Tracey

Yuan-Ju Chen

Edmund J Stachowski, Iii

Dirk Frans Rouckhout

Arthur Joseph Sullivan

Molly W Upton

Andrew B Donnalley

Molly J Upton

Donald S Tracey

Yuan-Ju R Chen

Arthur J Sullivan

Michael Francis Mcdonald

Richard E Baud

Jean-Pierre Courseaux

Edmund J Stachowski

Deborah Jean Davis

Michael F Mc Donald

An elastomeric nanocomposite contains: (a) at least one elastomer comprising units derived from isoolefins having from 4 to 7 carbon atoms; (b) at least 10 phr of a carbon black; and (c) at least 1 phr of a nanoclay; wherein when the nanocomposite is used in an article, the article has a gas permeation coefficient of 80.0 cc*mm/[m-day] at 40&#xb0; C. The carbon black may be graphitized to reduce interactions between the carbon black and the nanoclays. The elastomeric nanocomposite may, with or without the use of the graphitized carbon black, may calendared or extruded in such a manner as to orient the nanoclay platelets within the composition such that the oriented nanoclay elastomer nanocomposite has an orientation parameter of greater than 0.15.

Elastomeric nanocomposites, nanocomposite compositions, and methods of manufacture

A nanocomposite is formed from at least one copolymer and at least one nanofiller. The copolymer is formed of units derived from isoolefins having from 4 to 7 carbon atoms and multiolefins. The nanofiller comprising a surfactant wherein the surfactant has the structure of (RRRR)Nwherein Ris benzyl derived unit, which may or may not be substituted, wherein Ris selected from Cto Calkyls, Cto Calkenes, and Cto Caryls, and wherein Rand Rare the same or different and are independently selected from Cto Calkyls, Cto Calkenes, and Cto Caryls.

A process for producing a nanocomposite of a halogenated elastomer and an inorganic, exfoliated clay includes the in-situ protonation of a modifier, which may be an alkylamine, arylamine or an alkylarylamine. This process can be integrated with a polymer halogenation process. The nanocomposite so formed has improved air barrier properties and is suitable for use as a tire innerliner or innertube.

Polymer-clay nanocomposite and process for preparing the same

A nanocomposite comprising at least one elastomer and at least one nanofiller. The elastomer comprises units derived from isoolefins having from 4 to 7 carbon atoms and at least one multiolefin. The nanofiller comprise a layered filler and an amine modifier wherein the nanofiller is substantially free of any unassociated amines. By eliminating unassociated amines in the nanofiller, prior to contact with the elastomer, the nanocomposite has improved processability characteristics while maintaining desired impermeability characteristics.

The invention discloses improved processes to halogenate polymers. In particular, the invention discloses to improved processes to halogenate polymers made from C-10isoolefins.

Halogenation processes

An elastomeric nanocomposite is produced from an isobutylene-based polymer and a layered nanofiller. The process of preparing the nanocomposite includes the steps of a) polymerizing isobutylene monomers and multiolefin monomers to produce an isobutylene-based polymer; b) completing at least one mass transfer dependent stage in the process wherein, after completion of the stage and prior to any recovery of the polymer, the polymer is dissolved in a solvent to create a polymer cement; c) contacting the layered nanofiller and the polymer solvent to obtain the nanocomposite; and d) recovering the nanocomposite. The layered nanofiller may be in a slurry prior to contacting with the polymer cement.

Elastomeric nanocomposite manufacturing

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

Provided for herein is a process to produce an essentially homogeneous single liquid phase hydrocarbon-rubber cement from a polymer slurry comprising a hydrocarbon-rubber, a diluent, and unreacted monomer(s), the process comprising:

Process to produce a hydrocarbon rubber cement utilizing a hydrofluorocarbon diluent

Methods for producing elastomers or elastomeric compositions are provided. One or more Cto Cisoolefins and one or more comonomers can be polymerized in the presence of a diluent comprising one or more hydrofluorocarbons to provide a slurry comprising polymer product, unreacted monomer and the diluent. The slurry can be extruded to separate at least a portion of the diluent from the polymer product. The separated diluent can be recycled for polymerizing the one or more Cto Cisoolefins.

Separation of polymer slurries

The present invention provides an elastomeric composition processable in a curable, filled rubber formulation. The composition comprises a halogenated interpolymer of a Cto Cisoolefin and from 3 to 20 weight percent alkylstyrene and comprising from 0.2 to 2 mole percent haloalkylstyrene, a Mooney viscosity less than 27, a number average molecular weight less than 270,000, a weight average molecular weight less than 470,000, a z-average molecular weight less than 700,000, and a branching index (g') from 0.4 to 1.1. Also disclosed are a method of making a cured, filled rubber article, comprising compounding the elastomeric composition with filler and curative, processing the compounded composition to form a shape of the article, and curing the composition to obtain the article in the formed shape, as well as a tire comprising an innerliner made by the method.

Processable filled, curable halogenated isoolefin elastomers

The invention relates to new polymerization processes using hydrofluorocarbons to produce polymers. In particular, the invention relates to new polymerization processes using turbulent flow reactor systems using diluents including one or more hydrofluorocarbon(s) to produce polymers.

Reactor systems for use in polymerization processes

The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent.

Polymerization processes

The present invention is a process to produce a nanocomposite of a elastomer and organic clay, e.g. an exfoliated clay, suitable for use as an air barrier. The process can include the steps of: (a) contacting a solution () of butyl rubber in an organic solvent with a halogen () to form a halogenated butyl rubber solution (); (b) neutralizing the halogenated butyl rubber solution; (c) functionalizing at least a portion () of the halogenated butyl rubber; (d) mixing a dispersion () of clay with the functionalized butyl rubber () to form a masterbatch () comprising a polymer-clay nanocomposite; (e) combining the masterbatch () with the rest of the halogenated butyl rubber solution () to form a second mixture (); (e) recovering the nanocomposite from the second mixture (). The nanocomposite so formed has improved air barrier properties and is suitable for use as a tire innerliner or innertube.

Split-stream process for making nanocomposites

Growing community of inventors

Kingwood, TX, United States of America

Robert Norman Webb