Basf Aktiengesellschaft

Josef W&uuml;nsch

Konrad Knoll

Hermann Gausepohl

Michael Gepr&auml;gs

Wolfgang Fischer

Norbert Niessner

Paul Naegele

J&uuml;rgen Koch

Michael Schneider

Peter Ittemann

David Fischer

Hans-Herbert Brintzinger

Norbert G&uuml;ntherberg

Rainer Anderlik

Joachim R&ouml;sch

Sabine Philipp

Marc Prosenc

Nicole Schneider

Richard Rebizak

Herrmann Gausepohl

Thermoplastic elastomer compositions

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

Thermoplastic moulding materials

Block copolymers comprise at least two hard blocks S and S made from vinyl aromatic monomers and, between these, at least ore random soft block B/S made from vinyl aromatic monomers and from dienes, where the proportion of the hard blocks is above 40% by weight, based on the total block copolymer, wherein the 1,2-vinyl content in the soft block B/S is less than 20%.

Glass-clear impact-modified polystyrene based on styrene-butadiene block copolymers

Polymer mixtures comprised of styrene polymers

Star polymers obtainable by polymerization of vinylaromatic monomers with a branching monomer unit containing at least two vinylaromatic functional radicals in the presence of a catalyst obtainable from A) a transition-metal complex from sub-group II to VIII, B) a cation-forming agent and C), if desired, an aluminum compound.

Star polymers and process for producing the same

Star polymers, and their preparation

In a process for preparing polymers based on monomers having a C&boxH;C double bond by homopolymerization or copolymerization of these monomers in the presence of a catalyst system comprising a metallocene complex A) and a compound B) capable of forming metallocenium ions and, if desired, an organometallic compound of main group I, II or III of the Periodic Table of the Elements C), the metallocene complex A) used is a compound of the formula (I)

Cyclopenta&lsqb;I&rsqb; phenanthrene-metal complex catalyst systems

In a process for preparing polymers of vinylaromatic compounds at from 0 to 150&deg; C. in the presence of metallocene complexes as catalysts, the polymerization is carried out at a pressure of from 5 to 300 bar in the presence of aliphatic C,-C,-hydrocarbons using a coordination complex selected from the group consisting of strong, uncharged Lewis acids, ionic compounds having Lewis acid cations and ionic compounds having Bronsted acids as cations as cocatalyst.

Preparation of polymers of vinylaromatic compounds under superatmospheric pressure in the presence of volatile hydrocarbons

A process for preparing polymers of vinylaromatic compounds in dispersion comprises conducting the polymerization in the presence of a dispersing auxiliary and a catalyst obtainable from A) a transition metal complex of subgroups II to VIII, B) a cation-forming agent and C), if desired, an aluminum compound.

Process for preparing polymers from vinylaromatic compounds by dispersion polymerization

Thermoplastic moulding compounds

The present invention is a process of preparing copolymers of vinyl aromatic and olefinic monomers wherein the polymerization is carried out in a dispersion in the presence of a metallocene catalyst and a dispersion aid. The dispersion aid is a styrene-diene two-block copolymer or a styrene-diene three-block copolymer. The resultant polymer is useful as a fiber, film or molding.

Dispersion polymerization in the presence of metallocene catalyst

Growing community of inventors

Schifferstadt, Germany

Josef Wünsch

Growing community of inventors

Schifferstadt, Germany

Josef W&uuml;nsch

Josef Wünsch