Bayer Corporation

Arlanxeo Singapore Pte. Ltd.

Lanxess Corporation

Arlanxeo Canada Inc.

Bayer Aktiengesellschaft

Arlanxeo Deutschland Gmbh

Lanxess International Sa

Paul Nguyen

Gilles J Arsenault

Jessica Watson

Sharon X Guo

Gregory J E Davidson

Steven John Teertstra

Harald Bender

Treena Crockett

Jessica Lee Watson

Hanns-Ingolf Paul

Rolf Feller

David Thompson

John Lovegrove

Adam Gronowski

Udo Wiesner

Wei Chen

Franz-Josef Mersmann

Carl Walter Von Hellens

Carsten Kreuder

Werner Bäcker

Richard Samuel Steevensz

Rotraud Casper, Legal Representative

Janet Gamlin

Hans Christian Strauch

Kevin Alam

Robert Michael Wise

Thomas Mulder

Udo Weisner

Tobias Groemping

Sven Bach

Baecker Werner

Hans Rafael Winkelbach

Ignazio Spadola

Tobias Gromping

Richard Steevensz

Tobias GRÖMPING

A process for producing a crosslinked polymer involves contacting an epoxidized unsaturated isoolefin copolymer with a catalytic amount of an acid in an absence of a solvent. A process for producing a hydroxylated unsaturated isoolefin copolymer involves contacting an epoxidized unsaturated isoolefin copolymer with a catalytic amount of an acid in an absence of a solvent. A hydroxylated unsaturated isoolefin copolymer having hydroxyl groups in endo configurations may be produced thereby.

Treatment of epoxidized unsaturated isoolefin copolymers

A copolymer has low levels of cyclic oligomeric compounds, which are undesirable impurities in certain applications. The cyclic oligomeric compounds are provided in an advantageously low ratio of C21/C13 oligomers. The C13 oligomers are extractable using steam to further reduce the total amount of cyclic oligomers. A process for producing the copolymer having low levels of cyclic oligomers involves contacting at least one isoolefin monomer with at least one multiolefin and/or &#x3b2;-pinene monomer in the presence of at least one Lewis acid and at least one initiator in a diluent. The diluent contains a hydrofluorinated olefin (HFO) comprising at least three carbon atoms and at least three fluorine atoms. Hydrofluorinated olefins used in the present invention are better diluents for butyl slurry cationic polymerization than saturated hydrofluorocarbons.

Copolymer having low cyclic oligomer content

A copolymer has high levels of multolefin incorporation. A process for producing the copolymer having high levels of multiolefin incorporation involves contacting at least one isoolefin monomer with at least one multiolefin and/or &#x3b2;-pinene monomer in the presence of at least one Lewis acid and at least one initiator in a diluent. The diluent contains a hydrofluor-Mated olefin (HFO) comprising at least three carbon atoms and at least three fluorine atoms. Hydrofluorinated olefins used in the present invention are better diluents for butyl slurry cationic polymerization than saturated hydro-fluorocarbons.

Copolymer having high multiolefin content

This invention discloses a sulfur free and ZnO free cross-linking composition comprising a multifunctional phosphine crosslinking agent and halobutyl polymers or halogen containing polymers.

Sulfur-free, zinc-free cure system for halobutyl and halogen containing polymers

The invention relates to an efficient polymerization process and its use to produce novel copolymers with a specific micro structure. In particular, the invention relates to butyl rubbers with novel micro structure, preferably those obtainable by copolymerization of monomer mixtures comprising isobutylene and isoprene in diluents comprising 2,3,3,3 -tetrafluoro-1-propene. In a further aspect the invention relates to halogenated copolymers obtainable from such novel copolymers by halogenation.

2,3,3,3-tetrafluoro-1-propene as diluent for the preparation of novel butyl rubbers

A copolymer has low levels of isoprenoid (short chain branching) structures. A process for producing the copolymer having low isoprenoid content involves contacting at least one isoolefin monomer with at least one multiolefin and/or &#x3b2;-pinene monomer in the presence of at least one Lewis acid and at least one initiator in a diluent. The diluent may contain a hydrofluorinated olefin (HFO) comprising at least three carbon atoms and at least three fluorine atoms. Hydrofluorinated olefins used in the present invention are better diluents for butyl slurry cationic polymerization than saturated hydrofluorocarbons. Blends of saturated hydrofluorocarbons (e.g. 1,1,1,2-tetrafluoroethane) with an inert solvent (e.g. methyl chloride) may also be used as diluents.

Copolymer having low isoprenoid content

The present invention is directed to a process for preparing epoxidized polymers. The process comprises reacting an unsaturated polymer with hydrogen peroxide in the presence of a polymer support having a sulfonic acid group. The present invention is also directed to an epoxidized halogenated-polymer which comprises repeating units derived from at least one isoolefin monomer and repeating units derived from at least one diolefinic monomer, and one or more allylic halide groups and one or more oxirane functional groups in the polymer backbone.

Processes for preparing epoxidized polymers

A process for producing a copolymer involves contacting at least one isoolefin monomer with at least one multiolefin and/or &#x3b2;-pinene monomer in the presence of at least one Lewis acid and at least one initiator in a diluent. The diluent contains a hydrofluorinated olefin (HFO) comprising a tetrafluorinated propene. Copolymers produced by a process of the present invention have a cyclic oligomer content lower than comparable polymers produced in a butyl rubber slurry process using 1,1,1,2-tetrafluoroethane and/or methyl chloride as a diluent as well as a more favorable ratio of C21/C13. Hydrofluorinated olefins used in the present invention are better diluents for butyl slurry cationic polymerization than saturated hydro fluorocarbons.

Hydrofluorinated olefins (HFO's) as diluents for butyl rubber production

The present invention relates to a process for the production of halogenated butyl rubber and an apparatus for the production of rubber cement for use in the production of halogenated butyl rubber. The process and apparatus permit direct mixing of aqueous rubber slurry with a non-halogenated organic solvent to make a rubber cement solution. The water layer is then separated from the partially dissolved rubber cement and the cement phase is sent for halogenation. The apparatus is an enclosed vessel comprised of at least one dissolving zone and at least one separator zone. The process and apparatus advantageously employ recycle of rubber cement in order to disrupt an interface layer that forms between the water and rubber cement, to thereby improve continuously operation of the process.

Process and apparatus for production of halogenated butyl rubber with reduced emissions

The invention relates to an energy efficient, environmentally favorable process for the preparation of brominated rubbers, in particular bromobutyl rubber, that uses a common medium for both solution polymerization and subsequent bromination of the rubber and which further exhibits an enhanced bromine usage due to the use of a oxidizing agent. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and bromination of rubber in the presence of a brominating agent and an oxidizing agent with intermediate removal of un-reacted monomers.

Common solvent process for producing high molecular weight brominated rubber

Hydrogenated copolymers of an unsaturated nitrile, butadiene and isoprene, wherein the molar ratio of butadiene to isoprene is less than 3:1, display valuable low temperature properties.

Hydrogenated nitrile rubbers with improved low-temperature properties

The present invention provides a process of hydrogenating a nitrile copolymer rubber, which comprises subjecting the copolymer to hydrogenation in the presence of a hydrogenation catalyst, a co-catalyst, and a proton acceptor that is non-coordinating with the metal-complex catalyst.

Epoxidized soybean oil enhanced hydrogenation of nitrile copolymer

A process is provided for the removal of iron- and rhodium-containing residues from a solution of hydrogenated nitrile rubber. The process utilizes an ion-exchange resin having thiourea functional groups. Further, the resin is both macroporour and monodispersed. The process removes both rhodium and iron from viscous rubber solutions. In a preferred embodiment, the process is carried out in an ion-exchange column.

Process for removing iron-and rhodium-containing catalyst residues from hydrogenated nitrile rubber

Disclosed herein is a process for the production of hydrogenated nitrile rubber. The appearance of corrosion in the plant equipment in which hydrogenated nitrile rubber is produced is due to the unexpected presence of relatively large amounts of HCl, generated, surprisingly, by the hydro-dehalogenation of the monochlorobenzene solvent under the reaction conditions. The addition of a compatible weakly basic additive, such as Epoxidized Soy Bean Oil (ESBO), to the reaction mixture has alleviated this serious problem.

Process for the production of hydrogenated nitrile rubber

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London, Canada

Paul Nguyen