Bayer Aktiengesellschaft

Bayer Materialscience Ag

Bayer Corporation

Covestro Deutschland Ag

Bayer Akteingesellschaft

Bauer Ag

Bayer Intellectual Property Gmbh

Ineos Styrolution Group Gmbh

Styrolution Gmbh

Ineos Abs Limited

Herbert Eichenauer

Karl-Heinz Ott

Alfred Pischtschan

Edgar Leitz

Christian Lindner

Adolf Schmidt

Karl-Erwin Piejko

Heinrich Alberts

Dieter Wittmann

Thomas Eckel

Ulrich Jansen

Hans-Josef Buysch

Hans-Jurgen Kress

Eckhard Wenz

Hartwig Hocker

Norbert Schon

Horst Peters

Josef Buekers

Ludwig Bottenbruch

Jochen Schoeps

Joachim Doring

Hans-Erich Gasche

Hartmuth Buding

Helmut Keul

Harry Staratschek

Stefan Moss

Peter Kruger

Torsten Groth

Friedemann Muller

Bruno Bomer

Hans-Eberhard Braese

Karl Zabrocki

Holger Warth

Josef Kasbauer

Udo W Hendricks

Bahman Sarabi

Martin Bohnenpoll

Volker Damrath

Peter Mues

Lothar Meier

Ralph Ostarek

Bernd-Michael Konig

Vera Buchholz

Pierre Vanhoorne

Peter Orth

Hans-Bernhard Hauertmann

Liqing-Lee Sun

Rolf-Volker Meyer

Andreas Seidel

Claus H Wulff

Ernst Roos

Bernhard Jansen

Josef Merten

Michael Zobel

Frank Wingler

Alfred Eitel

Holger Lutjens

Bernd Keller

Artur Haus

Otto Koch

Udo Wolf

Rudolf Casper

Hans-Jürgen Thiem

Evgeny Avtomonov

Bernd Willenberg

Otto Billinger

Evgueni Avtomonov

Eberhard Jurgens

Heinz Hammer

Ekkehard Frohberg

Jürgen Ramthun

Michael Bodiger

Wolfgang Siebourg

Dieter Wittman

Maria Gartner

Dorothy Rose

Peter Kr&uuml;ger

Hans-Jurgen Bunte

Olaf Meincke

Joachim D/o/ Ring

Thomas Heitz

Ralf-Jürgen Born

Wilhelm Bergmeier

Christof Boden

Karl H Ott

Bernd Urbanneck

Holger Flat A 15/F The Harbourview Warth

The present invention relates to polycarbonate compositions comprising

Impact-modified polycarbonate compositions having a good combination of natural color, hydrolytic stability and melt stability

A thermoplastic molding composition suitable for producing article having improved surface quality is disclosed. The composition includes A) at least one polymeric resin selected from the group consisting of polycarbonate, polyester carbonate, polyamide, polyalkylene terephthalate and polyoxymethylene, and B) a co-precipitated mixture of graft polymer B.1 the preparation of which entailed redox initiation and graft copolymer B.2 the preparation of which entailed persulfate initiation.

Impact-modified blends

A thermoplastic molding composition is disclosed. The composition that contains at least one member selected from the group consisting of aromatic polycarbonate and polyester carbonate, a rubber-modified vinyl (co)polymer, and calcium carbonate having average particle diameter of less than 100 nm is particularly suitable for making articles resistant to hydrolysis.

Polycarbonate molding compositions with improved hydrolysis resistance

Thermoplastic molding compositions containing grafted polymers produced with different initiator systems are disclosed. The compositions are distinguished by a combination of good toughness and reduced opacity. As a result, appreciably smaller quantities of pigment are needed to color the molding composition.

Thermoplastic molding compositions

A method of using Raman Spectra for determining the progress of a graft polymerization reaction is disclosed. The method entails (a) measuring at the beginning of the reaction and at a plurality of time intervals in the course of the reaction, continuously and on-site, the Raman spectrum in the wave number range of 100 to 4000 cmof one or more of the monomers and/or polymers entailed in the reaction and of at least one internal standard and (b) recording the spectra and (c) adding reaction partners necessary to the reaction continuously and/or discontinuously and (d) calculating the change in concentration of the monomers and polymers by comparing the spectra of the monomers or polymers with the internal standard.

Determining the reaction progress of graft polymerization reactions

A Polymer compositions that features high degree of toughness, very good processability and extremely high gloss is disclosed. The composition contains

ABS moulding material with improved workability and a high lustre

The present invention provides polymer compositions of special graft rubber polymers, in the production of which are employed rubbers with defined particle diameters obtained by seed polymerization using seed latex particles with defined particle diameters.

Polymer compositions with improved property constancy

A thermoplastic molding composition that features a combination of extremely good toughness, good processability, adjustable surface gloss, good inherent color and reduced opacity is disclosed. The composition contains A) a graft rubber that is the product of free-radical emulsion polymerization using a peroxodisulfate initiator, B) a graft rubber that is the product of free-radical emulsion polymerization using an azo compound initiator and C) a graft polymer that is the product of solution, bulk or suspension polymerization.

ABS compositions with improved property combinations

The present invention relates to a method for agglomerating finely divided rubber latices by adding an aqueous solution of a water-soluble amphiphilic copolymer that contains at least one hydrophilic portion and at least one hydrophobic portion.

Method for agglomerating finely divided polybutadiene latices

A thermoplastic molding composition having improved mechanical properties is disclosed. The composition contains (A) aromatic polycarbonate and/or polyester carbonate (B) at least one graft rubber, obtained by emulsion polymerization of styrene and acrylonitrile in the presence of at least two rubber latices of type (B1) and (B2) where (B1) has a particle diameter dof &#x2266;350 nm, a particle size distribution range of 30 nm to 100 nm, and a gel content of 70 wt. %, and (B2) has a particle diameter of &#x2267;350 nm, a particle size distribution range of 50 nm to 500 nm, and a gel content of &#x2267;70 wt. %, and the difference in the average particle diameter of B1 and B2 is &#x2267;50 nm, (C) an optional copolymer of styrene and or acrylonitrile and for methyl methacrylate and/or N-substituted maleinimide, and optionally (D) flame retardant as well as optionally conventional additives.

Polycarbonate molding materials containing graft rubber

A molding composition having good surface gloss, high elongation at break and good thermoplastic processability is disclosed. The composition contains (A) a graft polymer that is obtained by free-radical polymerization of resin-forming vinyl monomers in the presence of rubber in latex form, (B) a copolymer of styrene and acrylonitrile and an optional (C) a resin selected from the group consisting of polycarbonates, polyester-carbonates, polyesters and polyamides. The preparation of the graft polymer is characterized in that (i) before the start of the grafting polymerization reaction the rubber latex is brought to a pH of 9 to 11, (ii) the redox initiator components are employed in amounts of 0.1 to 2.5 wt. % (based on the monomers metered in) and (iii) during the entire grafting polymerization reaction the pH remains constant&plusmn;0.5 and in the range of 11.0 to 8.8, and (iv) the temperature difference between the start and end of the reaction is at least 10&deg; C.

Thermoplastic molding materials based on special graft rubber components

Thermoplastic molding composition characterized in that the polymer proportion soluble in dichloromethane has a c value of acrylonitrile of &gE;28 wt. % and a chemical distribution (c &minus;c value) of the acrylonitrile of &gE;5 wt. % is disclosed. The composition is characterized by its improved processability by extrusion and thermoforming.

ABS molding materials with enhanced working properties

The invention relates to homopolymers and/or copolymers containing <100 ppm coarse particles with a particle diameter of between 200 and 500 &mgr;m, to thermoplastic moulding materials containing said homopolymtrs and/or copolymers, to the use of the homopolymers and/or copolymers and moulding materials for the production of moulded parts and to the moulded parts themselves.

Thermoplastic resins with a low proportion of coarse particles

Thermoplastic molding compounds

A thermoplastic molding composition that contains a plurality of graft rubbers is disclosed. A first graft rubber is a product of emulsion polymerization of a mixture containing styrene and acrylonitrile in the presence of butadiene polymer latex (A) having an average particle diameter (d ) of 80 to 220 nm. An additional graft rubber is a product of emulsion polymerization of a mixture containing styrene and acrylonitrile in the presence of butadiene polymer latex (B) having an average particle diameter (d ) of 350 to 650 nm. The butadiene polymer latex (A) is the product of seed polymerization in which seed is butadiene polymer latex having a median particle diameter of 10 to 100 nm, and the butadiene polymer latex (B) is the product of agglomeration in which butadiene polymer latex (A) is the starting latex.

Polymer compositions having improved constancy of properties

Growing community of inventors

Dormagen, Germany

Herbert Eichenauer