Lanxess Corporation

Bayer Aktiengesellschaft

Bayer Corporation

Bp Chemicals Limited

Cambridge Enterprise Limited

Uea Enterprises Limited

Manfred Bochmann

Shaun Garratt

Gerhard Langstein

Kevin Kulbaba

Dawei Di

Daniel John Nicholas Credgington

Mark Schormann

Mark John Sarsfield

Le Yang

David M Dawson

Alexander Sergeyevich Romanov

Antonio Guerrero

The present invention provides complexes of the formula (L)M(X), in which M is a metal atom selected from copper, silver and gold; L is a carbene ligand; and X is a monoanionic ligand. The complexes are useful as light emitters in the emissive zone of light-emitting devices such as OLEDs. The present invention also provides organometallic complexes which exhibit RASI photoemission, and the use of the same in light-emitting devices such as OLEDs.

Metal complexes

A cationic polymerization process for isoolefins using a zinc halide initiator. The zinc halide initiator is added to a solution of the isoolefin in a suitable solvent, preferably a halocarbon solvent. Polymerization reactions are normally conducted at temperatures high enough to allow the zinc halide initiator to dissolve in the solution. An alkyl halide activator may optionally be used and is preferably added to the solution prior to the zinc halide initiator. A multiolefin may optionally be present in the solution. The process is particularly useful in the formation of isoolefin homopolymers and co-polymers of isoolefins and multiolefins, such as butyl rubber.

Polymerization process using zinc halide initiators

This invention relates to a metal organic compound, a catalytic composition comprising said metal organic compound, a process for homo- or co-polymerizing isoolefines in the presence of said metal organic compound and a method of stabilizing a compound of the general structure (II) [R'HC(CRR&#x2033;)][MX], in which R is a group of the formula SiRRR, R&#x2033; is hydrogen, Cto Calkyl, a Cto Caryl or a Cto Calkylaryl, M is Zr or Hf, X is a halogen atom, and Rto Ris a Cto Calkyl group, with a compound R&#x2032; of the formula M&#x2032;RRR, in which M&#x2032; is Si, Ge, Sn or Pb and Rto Ris a Cto Calkyl group as well as a non-coordinating anion of the general structure [MX]in which M is Zr or Hf and X is a halogen atom.

Process for preparing isobutylene-based polymers

The present invention relates to a process for producing polymers containing repeating units derived from at least one isoolefin monomer, optionally repeating units derived from at least one multiolefin monomer and optionally further copolymerizable monomers in the presence of a zinc compound and optionally an organic halide activator.

Process for production of butyl rubber

Novel nitrogen containing transition metal complexes have general formula (I): wherein M is Fe&lsqb;II&rsqb;, Fe&lsqb;III&rsqb;, Ni&lsqb;II&rsqb;, Co&lsqb;I&rsqb;, Co&lsqb;II&rsqb;, Co&lsqb;III&rsqb;, V&lsqb;III&rsqb;, Mn&lsqb;I&rsqb;, Mn&lsqb;II&rsqb;, Mn&lsqb;III&rsqb;, Mn&lsqb;IV&rsqb;, Ru&lsqb;II&rsqb;, Ru&lsqb;III&rsqb; or Ru&lsqb;IV&rsqb;; Pd&lsqb;II&rsqb;, V&lsqb;III&rsqb;, V&lsqb;IV&rsqb; or V&lsqb;V&rsqb;. X represents an atom or group covalently or ionically bonded to the transition metal M; R is independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; Z is a bridging group comprising a donor atom of N, P or S or alternatively is a neutral group comprising a C -C alkylene group, a silyl or germyl group, and n&equals; an integer to satisfy the valency of M. The complexes are suitable for use on the polymerization and copolymerization of olefins

Metal complexes as catalyst component for olefin polymerization

Polyisoolefins are produced using the process according to the invention by polymerising isoolefins, optionally with conjugated or unconjugated dienes and/or cationically polymerisable, mono- or polyunsaturated compounds in solution, in suspension or in the gas phase at temperatures of -100.degree. C. to +200.degree. C. and pressures of 0.1 to 100 bar in the presence of an initiator system consisting of aluminium-cyclopentadienyl compounds and boron compounds.

Process for the production of polyisoolefins by means of novel

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Norwich, United Kingdom

Manfred Bochmann