Basf Aktiengesellschaft

Basf Se Corporation

Hermann Gausepohl

Konrad Knoll

Volker Warzelhan

Wolfgang Fischer

Christian Schade

Adolf Echte

Philippe Desbois

Norbert Niessner

Herbert Naarmann

Paul Naegele

Christof Taubitz

Wolfgang Loth

Stephan J&uuml;ngling

Erhard Seiler

Franz Brandstetter

Graham Edmund Mc Kee

Klaus Boehlke

Alain Deffieux

Karl Gerberding

Michel Fontanille

Reiner Thiele

Klaus Penzien

Josef W&uuml;nsch

Rainer Moors

Rudolf H Jung

Hans Mittnacht

Jochem Henkelmann

Boris Breitscheidel

Juergen Hambrecht

Walter Heckmann

Rolf Wurmb

Andreas Henne

Wolfgang Schwarz

Sabine Weiguny

Lothar Schlemmer

Helmut Jenne

Thomas R&uuml;hl

Rolf Lebk&uuml;cher

Klaus Hahn

Hans-Josef Sterzel

Andreas Deckers

Klaus Bronstert

Martin Fischer

Gerhard Heinz

Graham E McKee

Klemens Massonne

Christoph Plachetta

Michael Fischer

Eugen Gehrer

Horst Reimann

Bernhard Rosenau

Norbert Guntherberg

Friedrich Seitz

Johann Swoboda

Norbert G&uuml;ntherberg

Joachim Queisser

Rainer Theysohn

Jurgen Hofmann

Gerrit A Luinstra

Dietmar Bender

Karl Ruppmich

Hilmar Ohlig

Karl-Heinz Wassmer

Wolfgang Seydl

Rolf Henn

Dieter Stein

Hans Sander

Josef Wunsch

Ehrenfried Baumgartner

Hermann Fischer

Jürgen Demeter

Karl Herrle

Joachim Seibring

Karl Seib

Heinz Pohlemann

Ruprecht Kroker

Christopher William Rieker

Axel Deimling

Elmar Mailahn

Rudolf Stephan

Jurgen Koch

Hans-Michael Walter

Eduard Heil

J&uuml;rgen Koch

Lorenz Siggel

Burghard Schmitt

Hermann Brandt

Jürgen Koch

Klaus Benker

Joachim Kunde

Fritz Reichel

Johann Zizlsperger

Peter Siebel

Karl-Heinz Batscheider

Rainer Klostermann

Georg Wassmuth

Hermann Dreher

Hans Wild

Guiscard Gluck

Ingo H Dorn

A process for preparing impact-resistant molding compositions by anionic polymerization of vinylaromatic monomers in the presence of a rubber, in a continuous-flow reactor cascade composed of at least two reactors, where the vinylaromatic monomers are fed in substreams to the reactors of the reactor cascade, and an anionic initiator and a rubber are fed at least to the first reactor, and where the reactor cascade is composed of back-mixing reactors.

Method for continuous anionic polymerization of impact-resistant polystyrene

A process for the preparation of linear polymers or block copolymers of styrene by anionic polymerization comprises carrying out the chain termination with an n-alkyl glycidyl ether or a dialkyl ketone.

Method for breaking a chain during anionic polymerisation

The invention relates to an anionically polymerised, impact-resistant polystyrene with a dispersed plasticiser phase, comprising particles with capsule particle morphology and method for production thereof.

Anionically polymerized, impact-resistant polystyrene with capsule particle morphology

Block copolymers comprise at least two hard blocks S and S made from vinylaromatic monomers and, between these, at least one random soft block B/S made from vinylaromatic monomers and from dienes, where the proportion of the hard blocks is above 40% by weight, based on the total block copolymer.

Transparent, impact-resistant polystyrene on a styrene-butadiene block copolymer basis

In a process for polymerizing dienes in a solvent comprising vinylaromatic monomers, the polymerization is carried out in the presence of a metal compound of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo or W as catalyst and a Lewis acid as cocatalyst and, if desired, an alkylating agent and, if desired, a regulator. This process can be used for preparing high-impact polystyrene, acrylonitrile-butadiene-styrene copolymers or methyl methacrylate-butadiene-styrene copolymers.

Method of producing rubber compositions in styrene solutions with sterically superior chelate catalysts

A process prepares impact-modified thermoplastic molding compositions which comprise a soft phase made from a rubber dispersed in a hard matrix composed of vinylaromatic monomers, where the hard matrix is prepared by anionic polymerization in the presence of a metal alkyl compound or a metal aryl compound of an element of the second or third main group, or of the second subgroup, of the Periodic Table.

Method for producing impact-resistant modified thermoplastic moulding materials

A process for preparing a solution of high molecular weight polymers of conjugated dienes in a vinylaromatic hydrocarbon by anionic polymerization of the diene in the presence of an alkyllithium as catalyst and a process for preparing impact-modified polymers of vinylaromatic compounds is described. The first process comprises firstly polymerizing the diene in solution in an aromatic hydrocarbon which is free of ethylenic double bonds to a molecular weight below about 10 , then adding a trialkylaluminum in a molar excess relative to the alkyllithium, diluting the solution obtained with the vinylaromatic compound and then coupling the polydiene with a polyepoxide or an alkyl (meth)acrylate to give a high molecular weight polymer. The solution obtained in this way is further processed to give an impact-modified polymer of a vinylaromatic hydrocarbon by polymerizing the solution prepared as described, if desired after addition of further amounts of a vinylaromatic compound, in a manner known per se.

Method for producing a solution of diene polymers in vinyl aromatic compounds and method for producing resistant vinyl aromatic polymers by polymerizing the same solution

Anionic polymerization process

In a process for the homopolymerization of vinylaromatic monomers or the copolymerization of vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl, at least one magnesium organyl and at least one aluminum organyl. The invention also provides an initiator composition for carrying out the process.

Method for retarded anionic polymerization

Preparation of impact-modified plastics

An anionically polymerized impact-modified polystyrene has a yield stress of at least 24 MPa, measured at 23&deg; C. to DIN 53455 and a hole impact strength of at least 11 kJ/m , measured at 23&deg; C. to DIN 53753, measured in each case on a specimen produced to ISO 3167. A preparation process is described.

Highly rigid, high-tenacity impact-resistant polystyrene

A process for preparing impact-modified styrene polymers (HIPS) omprises anionic polymerization of styrene in the presence of a rubber in one or more polymerization reactors in succession. The rubber is prepared in solution in an immediately upstream process. The heat of polymerization is utilized to remove the solvent for the rubber, this solvent having a boiling point lower than those of styrene and ethylbenzene, from at least one of the polymerization reactors via distillation with distillative cooling, and the solvent is reintroduced into the process of rubber preparation.

Method for the continuous production of thermoplastic molding materials

A process for the reaction of an organic compound in the presence of a catalyst comprising, as active metal, ruthenium alone or together with at least one Group Ib, VIIb, or VIIIb metal in an amount of from 0.01 to 30 wt %, based on the total weight of the catalyst, applied to a support, wherein from 10 to 50% of the pore volume of the support comprises macropores having a pore diameter in the range of from 50 nm to 10,000 nm and from 50 to 90% of the pore volume of the support comprises mesopores having a pore diameter in the range of from 2 to 50 nm, the sum of said pore volumes being 100%, and said catalyst as such.

Process for reacting an organic compound in the presence of a supported ruthenium catalyst

Polymer mixtures comprised of styrene polymers

In a process for the preparation of block copolymers from vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl or alkali metal alkoxide and at least one magnesium, aluminum or zinc organyl.

Method for the production of block copolymers by retarded anionic polymerization

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Mutterstadt, Germany

Hermann Gausepohl