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Basf Corporation

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Helmut Mach

Hans Peter Rath

Arno Lange

Dietmar Posselt

Klaus Bronstert

Dietmar Bender

Ulrich Eichenauer

Walter Denzinger

Klaus Muehlbach

Thomas Wettling

Hans-Henning Vogel

Harald Schwahn

Hannah Maria Koenig

Heinrich Hartmann

Knut Oppenlaender

Konrad Knoll

Martin Fischer

Herwig Hoffmann

Darijo Mijolovic

Rudolf Kummer

Markus Schubert

Motonori Yamamoto

Knut Oppenl&auml;nder

Stephan Hueffer

Peter Schwab

Thomas Ruhl

Daniel Wagner

Wolfgang Reif

Rainer Papp

Juergen Mohr

Stefan Hirsch

Ulrich Karl

Peter Reuter

Juergen Thomas

Marcus Sigl

Hans-Joachim Muller

Matthias Kiefer

Frank Poplow

Wolfgang G&uuml;nther

Phillip Hanefeld

Gabriele Lang

Hans-Michael Walter

Hannah Maria König

Klaus Mühlbach

J Richard Blackborow

Klaus Fischer

Freddy Gruber

Willibald Schoenleben

Joachim Rosch

Roland Schwen

Hans Horler

Odile Fichet

Thomas Perner

Dieter Franz

Volker Vogt

Anja Vinckier

Christian Drohmann

Mirjam Herrlich-Loos

Jürgen Stephan

Rainer Urban

Uwe Rachwalsky

Thomas Berg

Bela Ivan

Zsuzsanna Tamara Nagy

Cedric Vancaeyzeele

Nicole Hildebrandt

Juergen Jahn

Peter Werner Groh

Viktoria Palfi

Anne Berg

Dominique Teyssie

Benjamin Davion

Klaus MÜHLBACH

Richard Blackborow

Viktória Palfi

Péter Werner Groh

A process for preparing isobutene homo- or copolymer derivatives by (i) polymerizing isobutene or an isobutene-comprising monomer mixture in the presence of an iron halide-donor complex, an aluminum trihalide-donor complex, or an alkylaluminum halide-donor complex, (ii) reacting a resulting high-reactivity isobutene polymer with a compound which introduces a low molecular weight polar group or a substructure thereof, and (iii) in the case of reaction with a substructure, further reacting to complete the formation of the low molecular weight polar group. The homo- or copolymer derivatives include a radical of a hydrophobic polyisobutene polymer having a number-average molecular weight of 110 to 250 000 and low molecular weight polar groups including amino functions, nitro groups, hydroxyl groups, mercaptan groups, carboxylic acid or carboxylic acid derivative functions, sulfonic acid or sulfonic acid derivative functions, aldehyde functions and/or silyl groups.

Preparation of isobutene homo- or copolymer derivatives

The use of tetrahydrobenzoxazines I where Ris a hydrocarbyl radical and R, R, Rand Rare each independently hydrogen atoms, hydroxyl groups or hydrocarbyl radicals, and where Rto Rmay also form a second and a third tetrahydrooxazine ring, with the proviso that at least one of the substituents has from 4 to 3000 carbon atoms and the remaining substituents, when they are hydrocarbyl radicals, each have from 1 to 20 carbon atoms, as stabilizers for stabilizing inanimate organic material, especially turbine fuels, against the action of light, oxygen and heat.

Use of tetrahydrobenzoxazines as stabilisers

Use of tetrahydrobenzoxazines as stabilizers

A process for producing an isobutene copolymer derivative by: (I) free-radically copolymerizing (a) 10-90 mol % of a monoethylenically unsaturated C- to C-dicarboxylic acid, anhydride, or ester, (b) 10-90 mol % of a high-reactivity isobutene polymer having M=110-250000 and obtained by polymerizing isobutene in the presence of an iron-halide-, aluminum trihalide-, or alkylaluminum halide-donor complex, each donor being an ether or carboxylic ester function, or in the presence of a Lewis acid complex containing an organic sulfonic acid, and (c) 0-50 mol % of a monoethylenically unsaturated compound copolymerizable with (a) and (b), to obtain an intermediate isobutene copolymer; and (II) reacting the carboxylic acid functions in the intermediate with at least one of ammonia, an amine, and an alcohol, to form a moiety containing at least one of a hydroxyl, carboxylic ester, amino, quaternized amino, amido, and imido group.

Preparation of derivatives of isobutene copolymers

Preparation of isobutene homopolymers or copolymers having a number average molecular weight of from 500 to 5 000 000 by polymerization of isobutene or an isobutene-comprising monomer mixture in the presence of a Lewis acid or a complex comprising a Lewis acid as polymerization catalyst, wherein the polymerization is carried out in the presence of at least one hemiacetal or full acetal which can be obtained by protic acid-catalyzed reaction of at least one C-C-hydrocarbyl alcohol with at least one aldehyde or ketone having from 1 to 12 carbon atoms.

Process for preparing isobutene homopolymers or copolymers

A process for preparing isobutene homo- or copolymer derivatives by (i) polymerizing isobutene or an isobutene-comprising monomer mixture in the presence of an iron halide-donor complex, an aluminum trihalide-donor complex, or an alkylaluminum halide-donor complex, (ii) reacting a resulting high-reactivity isobutene polymer with a compound which introduces a low molecular weight polar group or a substructure thereof, and (iii) in the case of reaction with a substructure, further reacting to complete the formation of the low molecular weight polar group. The homo- or copolymer derivatives include a radical of a hydrophobic polyisobutene polymer having a number-average molecular weight of 110 to 250,000 and low molecular weight polar groups including amino functions, nitro groups, hydroxyl groups, mercaptan groups, carboxylic acid or carboxylic acid derivative functions, sulfonic acid or sulfonic acid derivative functions, aldehyde functions and/or silyl groups.

The use of tetrahydrobenzoxazines I where Ris a hydrocarbyl radical and

Use of tetrahydroberizoxazines as stabilisers

The use of polycyclic phenolic compounds which have up to 20 benzene rings per molecule and are obtainable by reacting a tetrahydrobenzoxazine I  

Use of polynuclear phenolic compounds as stabilisers

The present invention relates to diblock copolymers of the formula A-B which are formed from a polymer block A which is formed essentially from &#x3b1;-olefin units having from 6 to 22 carbon atoms, and a polymer block B which is formed essentially from isobutene units, to a process for their preparation, to their use in lubricant compositions and to lubricant compositions which comprise such diblock copolymers.

&#x3b1;-olefin/isobutene diblock copolymers

A process for the preparation of polyalkenylsuccinimide products, in particular polyisobutenylsuccinimide products, is proposed, in which a polyalkene is reacted with a maleic acid, maleic anhydride or a functional derivative thereof to give a polyalkenylsuccinic anhydride and the polyalkenylsuccinic anhydride is then reacted with an oligoamine or polyamine, the polyalkenylsuccinic anhydride either Novel polyalkenylsuccinimide products, in particular polyisobutenylsuccinimide products, and fuel additives are also proposed.

Method for producing polyalkenyl succinimide products, novel polyalkenylsuccinimide products with improved properties, intermediate products

A process is described for removing isobutene oligomers from an isobutene polymer by stripping the isobutene polymer with vapors of a saturated hydrocarbon having at least 8 carbon atoms and at least partly driving out the isobutene oligomers. Troublesome isobutene oligomers are substantially removed without impairing the reactivity of the isobutene polymer (expressed as the content of the methylidene double bonds).

Method for the removal of isobutene oligomers from an isobutene polymer

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Heidelberg, Germany

Helmut Mach