Basf Aktiengesellschaft

Basf Se Corporation

National University of Singapore

Styrolution Gmbh

Volker Warzelhan

Motonori Yamamoto

Ursula Seeliger

Hermann Gausepohl

Christian Schade

Bernd Bruchmann

Gunnar Schornick

Wolfgang Fischer

Philippe Desbois

Matthias Kroner

Robert Bachl

Martin Weber

Dieter Hannu Boeckh

Klaus Hahn

Norbert Niessner

Peter Bauer

Konrad Knoll

Gunter Pipper

Son Nguyen Kim

Walter Heckmann

Guido Funk

Frank Braun

Graham Edmund Mc Kee

Guenther Schweier

Anton Hesse

Hans Gropper

Karl-Heinz Schumacher

Bernd Lothar Marczinke

Dietrich Scherzer

Christian Maletzko

Rainer Karer

Andreas Keller

Martin Jochen Klatt

Roland Hingmann

Michael Fischer

Faissal-Ali El-Toufaili

Wolfgang Loth

Andreas Greiner

Herbert Fisch

Joachim Queisser

Axel Wilms

Rainer Hummerich

Volker Hildebrandt

Ralf Mohrschladt

Jurgen Hofmann

Rainer Konrad

Bernhard Schmied

Alain Deffieux

Stephan J&uuml;ngling

Michel Fontanille

Martin Laun

Wolfgang Ball

Dieter Bernhard Beimborn

Udo Pagga

Rainer Moors

Tai-shung Chung

Gerhard Ramlow

Natalia Widjojo

Gerrit A Luinstra

Piyada Charoensirisomboon

Andreas Wollny

Maarten Staal

Stefan Grutke

Jens Rieger

Klaus Erhardt

Thomas Breiner

Olaf Kriha

Andreas Radtke

Maximilian Hofmann

Michel Pepers

Stefan L&auml;tsch

Rainer Buschl

Walter Gotz

Michael Riethues

Holger Ruckdäschel

Edwin Baumann

Juergen Hofmann

Rainer Klostermann

Uwe Faller

Thieo E Hogen-Esch

Stephan Jungling

Benjamin Nehls

Alexander Gluck

Heiner Stange

Dimo K Dimov

Harald Kroeger

Stephane Menoret

Hansj&ouml;rg Sch&auml;ch

Davy Roger Suwier

J&uuml;rgen Demeter

Klaus Horchler V Locquengh

Christoph Kowitz

Seema Agrarwal

Wil Duijzings

Christian Exner

A process for producing an activated monomer composition comprising at least one lactam and/or lactone, one catalyst, and one activator permits storage of the resultant monomer composition, since this is stable with respect to polymerization. Said monomer composition is used inter alia in producing a polyamide molding via ring-opening, anionic polymerization.

Process for producing monomer compositions and use of these for producing a polyamide molding

The invention relates to a process for the preparation of a hollow filament (F) based on one or several molten or dissolved hyperbranched polymers (P) and potentially one or several further polymers (FP), characterized in that the molten or dissolved hyperbranched polymer (P) or the mixture of the hyperbranched polymer (P) with the further polymer (FP) is passed through one or several spinnerets (S), wherein the ratio between the spinneret die-length (L) and the die-channel (Delta-D) is between 0.1 and 9.5. The process can be applied for the preparation of hyperbranched polyethersulfone (HPES) hollow filaments.

Process for the preparation of hyperbranched hollow fibers

The present invention is directed to thin film composite membrane (TFC membrane) comprising a substrate layer (S) based on a sulfonated polymer, e.g. a sulfonated polyarylether, and a polyamide film layer (F) and further to a method for their preparation. Furthermore, the present invention is directed to osmosis processes, in particular to forward osmosis (FO) processes, using said membrane.

Composite membranes comprising a sulfonated polyarylether and their use in forward osmosis processes

A process for preparing polyaryl ethers in which a polycondensation of the monomer building blocks is carried out using microwave irradiation leads to thermoplastic molding compositions having improved color properties.

Method for producing polyaryl ethers

The invention relates to a flameproofed resilient block polymer comprising polymerized units of at least one vinylaromatic monomer and at least one diene monomer with at least one flameproofing agent B) which comprises a compound comprising phosphorus, in particular a phosphorus-containing melamine compound, a process for the preparation and the use for the production of moldings.

Flame-retardant elastic block copolymer

In a process for the anionic polymerization of vinylaromatic monomers or dienes in the presence of a lithium organyl or lithium alcoholate and a magnesium and/or an aluminum compound, a sterically hindered phenol or amine is added.

Method for carrying out the anionic polymerization of vinylaromatic monomers

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

Biodegradable polyether esters P1 obtainable by the reaction of a mixture consisting essentially of: (a1) a mixture essentiall) of 20 to 95 mol % adipic acid or ester-forming derivatives thereof or mixtures thereof, 5 to 80 mol % terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and 0 to 5 mol % of a sulphonate group-containing compounds In which the sum of the individual mol percentages is 100; and (a2) a mixture of dihydroxy compounds consisting essentially of (a21) 15 to 99 mol % of a dihydroxy compound selected from the group consisting of C -C alkane diols and C -C cycloalkane diols; (a22) 85 to 0.2 mol % of an ether function-containing dihydroxy compound as in formula I HO&mdash;&lsqb;(CH ) &mdash;O&rsqb; &mdash;H in which n is 2, 3 or 4 and m is a whole number from 2 to 250, or mixtures thereof, in which the molar ratio of (a1) to (a2) is in the range from 0.4:1 to 1.5:1 with the proviso that the polyether esters P1 have molar weight (M ) in the range from 5,000 to 80,000 g/mol, a viscosity index in the range from 30 to 450 g/ml (measured in o-dichlorobenzole/phenol (weight ratio 50/50) at a concentration of 0.5 wt. % polyether esters P1 at a temperature of 25&deg; C.) and a melting point in the range from 50 to 200&deg; C., and with the further proviso that from 0.01 to 5 mol %, in relation to the molar quantity of the components (a) used of a compound D with at least three groups capable of ester formation are used to produce the polyether esters P1, and other biodegradable polymers and thermoplastic moulding compounds, process for their production and biodegradable mouldings, adhesives, foams and blends with starch obtainable from the polymers or moulding compounds of the invention.

Biodegradable polymers, the production thereof and the use thereof for producing biodegradable moldings

A polyester dispersion comprising water and a biodegradable copolyester which contains structural units derived from both aliphatic and aromatic carboxylic acids or their derivatives, and the coated fertilizer granules prepared using this polyester dispersion, and a process for their preparation. A fertilization method in which the coated fertilizer granules according to the invention are used.

Use of an aqueous dispersion from a biodegradable polyester as a sheathing material for granulated fertilizer

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

Biodegradable polyestreramide and a process of preparing

Growing community of inventors

Weisenheim, Germany

Volker Warzelhan