Lanxess Corporation

Lanxess International Sa

Bayer Corporation

Arlanxeo Deutschland Gmbh

Adam Gronowski

Hanns-Ingolf Paul

Rolf Feller

John Lovegrove

Carsten Kreuder

Akhtar Osman

Dana K Adkinson

Udo Wiesner

Phil Magill

Rui Resendes

Gabor Kaszas

Jörg Kirchhoff

Stephan Glander

Paul Wagner

David Thompson

Paul Nguyen

Ricarda Leiberich

Joachim Ritter

Rainer Bellinghausen

Jorg Kirchhoff

Joerg Kirchhoff

Andreas Jupke

Martin Hecker

Kenneth Norman Watson

Dave Syme

Susmita Bhattacharjee

Udo Weisner

John George Lovegrove

John George Arnold Lovegrove

Treena Crockett

Stephan Quadrant Epp Ag Glander

The invention relates to an efficient process for the preparation of isoolefin polymers such as polyisobutene or butyl rubber by polymerization of isobutene and optionally further monomers in the presence of an initiator system prepared by continuously contacting at least one boron or aluminium compound and at least one initiator.

Process for the production of isoolefin polymers with improved initiator system preparation

The present invention relates to water and solvent-free halogenated butyl rubber products as well as a process for the production thereof.

Process for the production of water and solvent-free halobutyl rubbers

The invention relates to an energy efficient, environmentally favourable process for preparing water and solvent-free rubber ionomers and/or polymer nanocomposites comprising said rubber ionomers.

Process for the production of rubber ionomers and polymer nanocomposites

An integrated process for the solution polymerization and subsequent halogenation of butyl rubber in a common medium is disclosed. The process comprises providing a solution polymerization reactor containing a C6 medium mixed with a monomer mixture comprising at least an isoolefin monomer and a multiolefin monomer in a mass ratio of monomer mixture to medium of from 61:39 to 80:20. Once polymerized, residual unreacted monomer mixture is separated from the rubber solution using a distillation process. The residual monomers may then be purified and recycled back into the reactor. The separated rubber solution is then halogenated. The process obviates the need for separating the rubber from the medium following polymerization, then re-dissolving it in another solvent for halogenation, thereby saving energy cost. The process optionally employs heat exchangers for the reactor feed streams to further reduce energy consumption.

Common solvent process for producing high molecular weight halobutyl rubber

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

The invention relates to an energy efficient, environmentally favorable process for the preparation of halogenated rubbers, in particular chloro- and bromobutyl rubber, that uses a common aliphatic medium of specific composition for both solution polymerization and subsequent halogenation of the rubber. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and halogenation of rubber with intermediate removal of un-reacted monomers.

Common solvent process for producing high molecular weight halogenated rubber

The invention relates to an energy efficient, environmentally favorable process for the preparation of butyl ionomers that uses a common medium for both solution polymerization and subsequent bromination of butyl rubber. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and bromination of butyl rubber in the presence of a brominating agent and optionally for subsequent reaction with at least one nitrogen and/or phosphorus based nucleophile.

Process for production of halobutyl ionomers

The invention relates to a processes for preparing nanocomposites comprising rubber ionomers which were prepared by an energy efficient, environmentally favorable process that uses a common medium for solution polymerization, bromination of rubber and optionally subsequent polymer nanocomposite formation. Polymer nanocomposites according to the present invention exhibit high oxygen impermeability.

Process for production of polymer nanocomposites

The present invention relates to a substantially gel-free sealant or adhesive compound comprising butyl-type polymer without any conjugated aliphatic diene in its composition having an average molecular weight Mn of more than 20,000 g/mol and containing less than 15 wt. % of solid matter insoluble in boiling cyclohexane under reflux for 60 min., and a self-supporting shaped article comprising said compound optionally layered on or interposed between one or more supporting means as well as a tape comprising said substantially gel-free compound optionally layered on or interposed between one or more supporting means. In still another of its aspects, the present invention relates to an adhesive composition comprising said substantially gel-free compound. In still another of its aspects, the present invention relates to a sealant composition comprising said substantially gel-free compound.

Adhesive compounds of butyl-type rubber

The present invention relates to a peroxide curable rubber compound comprising at least one elastomeric polymer comprising repeating units derived from at least one Cto Cisomonoolefin monomer, at least one Cto Cmultiolefin monomer and at least one m- or p-alkylstyrene monomer.

Peroxide curable butyl formulations

The present invention is directed to a peroxide curable rubber compound containing a butyl rubber polymer and an olefin polymer of ethylene and at least one &#x3b1;-olefin. The present invention is also directed to a peroxide curable rubber compound containing a butyl polymer and an EP(D)M rubber polymer.

Peroxide curable butyl formulations for rubber articles

The present invention relates to a peroxide curable rubber compound containing at least one elastomeric polymer comprising repeating units derived from at least one Cto Cisomonoolefin monomer, at least one Cto Cmultiolefin monomer, at least one p- or m-alkylstyrene monomer and at least one co-agent.

The present invention relates to an elastomeric polymer having repeating units derived from at least one isomonoolefin monomer, at least one multiolefin monomer, at least one diisoalkenylbenzene monomer, and optionally further copolymerizable monomers, wherein the polymer has a Mooney viscosity (ML 1+8@125&#xb0; C. according to ASTM D1646) of less than 40 units and a Shore A hardness higher than 65 points @ 23&#xb0; C. (according to ASTM D2240) as well as a curable composition containing the elastomeric polymer and a shaped article manufactured from the curable composition.

Butyl-type rubber with high hardness

The present invention relates to a shaped article containing at least one peroxide curable compound containing a butyl-like polymer(s) without any conjugated aliphatic diene in its composition, said polymer containing less than 15 wt. % of solid matter insoluble in boiling cyclohexane under reflux for 60 min. The present invention also relates to a sealing material and a medical device containing at least one peroxide-curable compound containing a butyl-like polymer containing less than 15 wt. % of solid matter insoluble in boiling cyclohexane under reflux for 60 min. Further, the present invention relates to a process for producing a butyl-like polymer having no conjugated aliphatic diene in its composition and containing less than 15 wt. % of solid matter insoluble in boiling cyclohexane under reflux for 60 min. In addition, the present invention relates to a process the manufacturing of the inventive compound wherein the elastomeric polymer is mixed with at least one filler and at least one peroxide curing system in a mixing means.

Peroxide curable compounds based on butyl-like polymer without conjugated aliphatic dienes in its composition

The present invention relates to a shaped article for high purity applications containing at least one peroxide curable compound containing a substantially gel-free butyl polymer. In another of its aspects, the present invention relates to a sealing material and a medical device containing at least one peroxide-curable compound containing a substantially gel-free butyl polymer. In still another of its aspects, the present invention relates to a fuel cell containing at least one peroxide curable compound containing a substantially gel-free butyl polymer. In still another of its aspects, the present invention relates to halogen-free and sulfur-free shaped articles.

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Sarnia, Canada

Adam Gronowski