Basf Aktiengesellschaft

Basell Polyolefine Gmbh

Basf Se Corporation

Eckard Schauss

Andreas Deckers

Roger G Klimesch

Wilhelm Weber

Peter Hennenberger

Klaus Hilligardt

Horst Bullack

Benno Knauer

Hans Peter Rath

Guenther Schweier

Arend Jouke Kingma

Heinz Friedrich Sutoris

Arthur Hohn

Alexander Aumuller

Andrei Gonioukh

Ferdinand Lippert

Heinz Vogt

Andreas Koch

Arno Lange

Stephan Hueffer

Rainer Hemmerich

Ulrich Moll

Rudolf Mueller-Mall

Gabriele Lang

Thomas Perner

Matthias Schopohl

A process for the preparation of polyisobutene containing at least 75 mol % of terminal vinylidene groups, in which isobutene or an isobutene-containing hydrocarbon mixture is polymerized in the liquid phase in the presence of a boron trifluoride complex catalyst having the compositiona(BF):b(Co1):c(Co2)where Co1 is at least one tertiary alcohol, Co2 is at least one compound selected from water, primary alcohols, secondary alcohols, dialkyl ethers, alkanecarboxylic acids and phenols, the ratio c:b is from 0.9 to 1.8 and the ratio (b+c):a is from 0.9 to 3.0, is described.

Method for the production of polyisobutene

A process is described for preparing polyisobutene having a low halogen content, in which isobutene is polymerized in the presence of a catalyst which comprises a halogenated Lewis acid, the catalyst is removed and/or deactivated, and the resulting polyisobutene is contacted with a zeolite of an average pore size of from 5 to 15 &#x212b;.

Method for producing highly reactive, low halogen polyisobutenes

Ethylenically unsaturated monomers are polymerized in a gas-phase fluidized-bed reactor comprising a reactor space () in the form of a vertical tube, a calming zone () adjoining the upper part of the reactor space, a circulated gas line (), a circulated gas compressor (), a cooling apparatus (), a gas distributor plate () which forms the lower boundary of the reactor space and, if desired, a flow divider (), wherein the gas distributor plate () has a plurality of gas flow orifices () whose outlet sides are widened conically.

Gas-phase fluidized-bed reactor

Ethylenically unsaturated monomers are polymerized in a gas-phase fluidized-bed reactor comprising a reactor space ( ) in the form of a vertical tube, a calming zone ( ) adjoining the upper part of the reactor space, a circulated gas line ( ), a circulated gas compressor ( ), a cooling apparatus ( ), a gas distributor plate ( ) which forms the lower boundary of the reactor space and, if desired, a flow divider ( ), wherein the gas distributor plate ( ) has a plurality of gas flow orifices ( ) whose outlet sides are widened conically.

A catalyst composition suitable for the (co)polymerization of alk-1-enes is obtainable by mixing a metallocene complex with a C -C -alk-1-ene in an inert solvent, reacting the resulting mixture in a controlled manner with a compound capable of forming metallocenium ions and diluting the resulting mixture with an inert nonpolar, essentially aliphatic solvent, and also, if desired, applying the catalyst composition to a particulate support material.

Catalyst for the (co)polymerization of alk-1-enes

A catalyst solution for polymerizing &agr;-olefins is obtainable by reacting a metallocene compound with an activator compound which can react with the metallocene compound so as to displace a ligand from the central atom and stabilize the resulting cationic complex by a non-coordinating anion as an ion pair, adding one or more &agr;-olefins in a molar ratio of metallocene compound: &agr;-olefins of from 1:1 und 1:100 and mixing with at least 10 parts by volume of an aliphatic hydrocarbon.

Catalyst solution for the polymerization of &agr;-olefins

Polymers of olefinically unsaturated monomers

Olefin polymerization using a catalyst comprising a group VIIIB metal,

Process for producing ethylene copolymers under high pressure

A process for preparing keto-functional polyethylene waxes having a molecular weight of from 150 to 1000 g/mol by telomerization of ethylene with aldehydes at from 500 to 5000 bar and from 100 to 280.degree. C., wherein ethylene and aldehyde are employed in a molar ration of from 5:1 to 50:1.

Preparation of keto-functional polyethylene waxes

A process for compressing ethylenically unsaturated monomers at a pressure of 200-5000 bar in the absence of a polymerization initiator comprises carrying out compression in the presence of a sterically hindered amine derivative.

Compression of ethylenically unsaturated monomers

Copolymers of ethylene with .alpha.,.beta.-unsaturated carboxylic acids are prepared at from 50.degree. to 250.degree. C. and from 500 to 5000 bar in a stirred autoclave having a length/diameter ratio greater than 5:1 by a process in which the monomer mixtures are fed into the autoclave in at least two part-streams, the first part-stream being passed into the autoclave at the beginning of the autoclave pipe and the second part-stream being introduced at a position which is a distance away from the beginning which corresponds to 25-50% of the total length and the amount of the .alpha.,.beta.-unsaturated carboxylic acids in the first part-stream is from 20 to 90% less than the average amount in the further part-streams and a peroxide polymerization initiator having a lower decomposition temperature, or a mixture of peroxide polymerization initiators having a lower average decomposition temperature, than that of the initiators in the further part-streams is passed in with the first part-stream.

Process for the preparation of ethylene/(meth)acrylic acid copolymers

A catalyst for the copolymerization of ethylene by the gas-phase fluidized-bed method is prepared by a process in which a titanium-containing and magnesium-containing active component, reacted with an alcohol as a complexing agent, is applied to a finely divided silica from homogeneous solution, in the presence of a polysiloxane, by evaporating the solvent, and the resulting homogeneous catalyst intermediate is then preactivated by treatment with the alkylaluminum compound and the Lewis base in an inert hydrocarbon solution, and the copolymers prepared using the above catalyst are employed for the production of films exhibiting little blocking.

Catalyst for the polymerization of ethylene, its preparation and the use

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Heuchelheim, Germany

Eckard Schauss