Basf Aktiengesellschaft

Basf Se Corporation

The Procter Gamble Company

Styrolution Europe Gmbh

Klaus Muehlbach

Thomas Wettling

Martin Weber

Ivette Garcia Castro

Maxim Peretolchin

Hannah Maria Koenig

Jochen Mezger

Petra Baierweck

Helmut Mach

Graham E McKee

Ludwig Voelkel

Aaron Flores-Figueroa

Markus Hansch

Brigitte Gareiss

Norbert Niessner

Gerd Blinne

Christoph Plachetta

Harald Boehnke

Axel Gottschalk

Walter Goetz

Stefan Hirsch

Robert Heinz

Hans-Peter Weiss

Robert Weiss

Markus Brym

Rajan Keshav Panandiker

Dieter Hannu Boeckh

Sophia Ebert

Thomas Weiss

Erhard Seiler

Michael Portugall

Christian Maletzko

Peter Ittemann

Wolfgang Grabarse

Julie Ann Menkhaus

Rainer Dobrawa

Dietrich Lausberg

Klaus Boehlke

Christof Taubitz

Cornelia Roeger-Goepfert

Friedrich Seitz

Andreas Daiss

Frank Huelskoetter

Eckhard M Koch

Jack Tinsley

Rainer Theysohn

Bernhard Czauderna

Karl Ruppmich

Joerg Erbes

Bastiaan Bram Pieter Staal

Rainer Bueschl

Ehrenfried Baumgartner

Wolfgang Eberle

Konrad Mitulla

Rosa Corberan Roc

Sergei Victorovich Kostjuk

Irina Vasilenko

Dmitryi Shiman

Peter Steiert

Carola Hedtmann-Rein

Ulrich Eichenauer

Doris Zeltner

Hermann Brandt

Wolfgang F Mueller

Stefan Grutke

Christian Tock

Karl Hennig

Karlheinz Ulmerich

Bertram Ostermayer

Herbert Gutsche

Heiner Goerrissen

Uwe Blumenstein

Markus Weis

Gerhard Ramlow

Herbert Mayr

Sabine Oepen

Klaus Benker

Robert Haschick

Nicolas Inchaurrondo

Uwe Rachwalsky

Knud Faehndrich

James Hurley

Bernhard H Nowakowsky

Armin Kurps

Marco-Christian Volland

Rainer Urban

Michael Gall

Valentin Cepus

Wilfried Vogel

Davy Roger Suwier

Hermann Brandi

Dieter W Blum

Anne Berg

Heike Feldman

Peter Steieri

Michael Sauer

Ivan Berazianka

Michel Pepers

Marc Haehnlein

The present invention relates to a novel process for preparing high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 80 mol %. The present invention further relates to novel isobutene polymers.

Process for preparing high-reactivity isobutene homo- or copolymers

The present invention relates to a novel process for preparing high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 70 mol %. The present invention further relates to novel isobutene polymers.

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

Novel uses of copolymers for removing and/or reducing the level of deposits in the fuel system and/or injection system of direct injection diesel and/or gasoline engines are provided. What is provided is the use of particular copolymers as fuel additive or lubricant additive; to processes for preparation of such additives, and fuels and lubricants added therewith, such as, more particularly, as a detergent additive; to use of these copolymers for reducing the level of or preventing deposits in the fuel systems and especially the injection systems of direct injection diesel engines, especially in common rail injection systems, for reducing the fuel consumption of direct injection diesel engines, especially of diesel engines with common rail injection systems, and for minimizing power loss in direct injection diesel engines, especially in diesel engines with common rail injection systems; and as an additive for gasoline fuels, especially for operation of DISI engines.

Copolymers as additives for fuels and lubricants

The present invention relates to a process for preparing high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 70 mol %, which comprises polymerizing isobutene or an isobutene-comprising monomer mixture in the presence of an aluminum trihalide-donor complex effective as a polymerization catalyst or an alkylaluminum halide-donor complex effective as a polymerization catalyst, wherein the aluminum trihalide or alkylaluminum halide is treated with at least one inorganic hydrate.

The present invention relates to a process for preparing high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per homo- or copolymer chain end of at least 70 mol % which comprises polymerizing isobutene or an isobutene-comprising monomer mixture in the presence of an aluminum trihalide-donor complex effective as a polymerization catalyst or of an alkylaluminum halide-donor complex, said complex comprising, as the donor, a mixture of at least two organic compounds with at least one ether function each.

The present invention relates to novel uses of corrosion inhibitors in fuels and lubricants.

Corrosion inhibitors for fuels and lubricants

Polymers as additives for fuels and lubricants

Block copolymer comprising polyarylene ether blocks and polyalkylene oxide blocks, wherein said block copolymer comprises at least two polyalkylene oxide blocks that are endcapped with different endcapping groups.

Block copolymers

Preparation of isobutene homopolymers having a weight-average molecular weight of 75 000 to 10 000 000 by polymerization of isobutene, by

Process for preparing higher molecular weight polyisobutylene

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

Molding compositions comprising: a composition (I) present in an amount of 10 to 100% by weight, based on the molding composition, wherein the composition (I) comprises: (A) 40 to 95% by weight, based on the composition (I), of a copolymer comprising: &#x3b1;-methylstyrene in an amount of 55 to 90% by weight, acrylonitrile in an amount of 10 to 50% by weight, and one or more other monomers in an amount of 0 to 5% by weight, wherein the percentages by weight of the &#x3b1;-methylstyrene, the acrylonitrile and the one or more other monomers are based on the weight of component (A); (B) 2.5 to 75% by weight, based on the composition (I), of a polymer comprising: a vinylaromatic monomer in an amount of 60 to 90% by weight, acrylonitrile in an amount of 8.01 to 39.8% by weight, and maleic anhydride in an amount of 0.2 to 1.99% by weight, wherein the percentages by weight of the vinylaromatic monomer, the acrylonitrile and the maleic anhydride are based on the weight of component (B); and (C) 2.5 to 60% by weight, based on the composition (I), of glass fibers.

Reinforced thermoplastic molding compositions, processes for preparing such compositions, molding made with such compositions and uses therefor

Growing community of inventors

Gruenstadt, Germany

Klaus Muehlbach