Bayer Aktiengesellschaft

Basf Aktiengesellschaft

Bayer Materialscience Ag

Ineos Styrolution Group Gmbh

Siemens Aktiengesellschaft

Basf Se Corporation

Covestro Deutschland Ag

Roke Manor Research Limited

Styrolution Gmbh

Cisco Technology, Inc.

Agfa-gevaert Ag

Bayer Intellectual Property Gmbh

Basf Coatings Gmbh

Akzo Nobel Coatings International B.v.

Allnex Netherlands B.v.

Wolfgang Fischer

Jan Weikard

Norbert Niessner

Jurgen Meixner

Hermann Gausepohl

Michael Ludewig

Christian Schade

Konrad Knoll

Volker Warzelhan

Frank Richter

Dorota Greszta-Franz

Tobias Schulz

Josef Pedain

Philippe Desbois

Graham E McKee

Peter Ittemann

Graham Edmund Mc Kee

Christoph Gürtler

Ekkehard Jahns

Gisbert Michels

Rolf Pinkos

Friedrich-Karl Bruder

Friedrich Jonas

Thomas Fäcke

Achim Stammer

Wilfried Haese

Simon Paul Davis

Rafael Oser

Bernd Hisgen

Michael Fischer

Martin Weber

Dirk Achten

Klaus Joachim Mueller-Engel

Andreas Deckers

Rocco Paciello

Dieter Margotte

Sylke Haremza

Pramod Gupta

Manfred Bock

Werner Ostertag

Walter Heckmann

Serguei Kostromine

Michael Schelhaas

Helmut-Martin Meier

Klaus Joachim Müller-Engel

Norbert Guntherberg

Holger Mundstock

Jörg Schmitz

Bernhard Rosenau

Norbert Guentherberg

Nusret Yuva

Alain Deffieux

Christian Zwiener

Ulrich Jansen

Axel Gottschalk

Wolfgang Loth

Friedrich Seitz

Paul Naegele

Karl Ruppmich

Stefan Sommer

Norbert Güntherberg

Rainer Moors

Brian J Banaszak

J&uuml;rgen Meixner

Gerhard Klein

Klaus-Dieter Hungenberg

Peter Thometzek

Josef W&uuml;nsch

Roland Walker

Andrew Timothy Hayter

Philipp Boeckmann

Wieland Hovestadt

Klaus Noll

Markus Mechtel

Joachim Petzoldt

Karlheinz Hildenbrand

Lothar Kahl

Dirk Cyriel Quintens

Theodor Engbert

Joachim Wagner

Wolfgang Kremer

Christophe Bauduin

Karl Schrodi

Sven Grabowski

Sigurd Buchholz

Ramesh Subramanian

Rolf Bachmann

Beate Baumbach

Robert Weiss

Marco Hartmann

Maarten Staal

Jörg Büchner

Abdullah Ekin

Peter Zurowski

Holger Ohst

Andreas Künkel

Axel Deimling

Daniela Klein

Rainer Neumann

Hubert Ehbing

Polyacrylate graft rubber copolymer B and an impact modified thermoplastic molding composition thereof, where the graft copolymer B is composed of: B1: 50 to 70 wt.-% crosslinked acrylate polymer graft base B1 B2: 30 to 50 wt.-% graft shell B2 comprising a first layer B21 of vinylaromatic monomers, and a second layer B22 of vinylaromatic monomers B21-1 and nitrile monomers B22-2: wherein the particle diameter dw of the graft base BI is 255 to 290 nm; the fraction of B21 is 10 to 26 wt.-%; and the amount of B22-2, is 20 to 30 wt.-%.

Polyacrylate graft rubber copolymer and impact modified thermoplastic molding composition

A process for the production of a graft copolymer composition is presented, which is based on acrylonitrile-styrene-acrylate (ASA) or acrylonitrile-butadiene-styrene (ABS) graft copolymers. The graft copolymers obtained by emulsion polymerization and precipitation show improved dewatering behavior after precipitation. Based on this method ASA and ABS graft copolymers with low residual humidity can be obtained. Furthermore, the invention relates to a process for the production of a thermoplastic molding composition comprising at least one thermoplastic styrene copolymer, in particular a styrene-acrylonitrile copolymer, the graft copolymer obtained by the process, and optional further components.

Process for preparing graft rubber compositions with improved dewatering

The present invention is directed to a process for the production of graft copolymer compositions which are based on acrylonitrile-styrene-acrylate (ASA) or acrylonitrile-butadiene-styrene (ABS) graft copolymers. The graft copolymers compositions are obtained by emulsion polymerization and afterwards precipitation, dewatering, drying and optionally cooling of the dried graft copolymer powder, wherein the graft copolymer B powder obtained is mixed with an aeration gas, preferably air and/or nitrogen, wherein the bulk density of the graft copolymer B powder is equal or less than 98.5% of the bulk density of the non-aerated graft copolymer B, during the whole aeration step. The graft copolymer powders show higher powder flowability and less tendency of caking during storage, for example in a silo.

Process for the production of graft copolymer powder compositions and thermoplastic resin compositions

The present invention relates to a process for producing a thermoplastic molding composition and articles made thereof having improved surface quality, in particular improved surface quality after exposure to warm-humid environmental conditions. The thermoplastic molding composition comprises a thermoplastic polymer A, a graft copolymer B obtained by emulsion graft polymerization and optionally a further polymer component P, as well as optional further components/additives K, wherein at least one crystallization additive C, selected from phosphate compounds having 1 to 25 phosphate units, organic acids and salts thereof, is added during or after the preparation of the graft copolymer B.

Thermoplastic molding composition and articles made thereof having improved surface quality

A method for producing a polymer from a first component and a second component using a reactor () offers technical advantages, wherein reaction heat produced in the reactor () is discharged via a boiling cooler () by supplying gaseous vapors produced in the reactor () to the boiling cooler (). A product flow containing condensed vapors is returned to the reactor () from the boiling cooler () via a separation vessel (), and an aqueous phase is separated from the product flow in the separation vessel (). A system is provided for producing a polymer from a first component and a second component, comprising a reactor () and a boiling cooler () for discharging reaction heat produced in the reactor (). A separation vessel () is arranged between the boiling cooler () and the reactor () such that a product flow containing condensed vapors is returned to the reactor () from the boiling cooler () via the separation vessel ().

Method and system for producing a polymer

The invention relates to a method for polymerizing acrylates using a reactor (). Reaction heat produced in the reactor () is discharged via a boiling cooler () in that gaseous vapors produced in the reactor () are supplied to the boiling cooler (), and condensed vapors are returned to the reactor () from the boiling cooler (). At least one component containing acrylate is at least partly added via the boiling cooler () and reaches the reactor () via the boiling cooler (). The invention additionally relates to a system for polymerizing an acrylate, comprising a reactor () and a boiling cooler () for discharging reaction heat produced in the reactor (). The boiling cooler () has at least one filling opening () for supplying at least one component containing acrylate.

Method and system for polymerizing acrylates

The invention relates to a method for producing a polymer from a first component and a second component by means of a reactor (), wherein reaction heat in the reactor () is discharged via an evaporative cooler (), wherein gaseous exhaust vapour in the reactor () is supplied to the evaporative cooler (), and condensed exhaust vapour is guided from the evaporative cooler () back into the reactor (). In this way, the first component and/or second component are supplied at least partially via the evaporative cooler () and moved from the evaporative cooler () into the reactor (). The invention also relates to a system for producing a polymer, comprising a reactor () and an evaporative cooler () for discharging reaction heat in the reactor (). In addition, the evaporative cooler () has at least one filling opening () for filling in the first and/or second component.

The invention relates to a process for producing thermoplastic molding materials based on acrylonitrile-styrene-acrylate copolymers (ASA) having improved surface properties, in particular an improved stability of surface quality during storage in a hot and humid environment and a reduced content of residual monomers. The invention further relates to the use of a fluidized bed dryer and/or a flow dryer in the production of thermoplastic ASA molding materials for improving surface quality and the use of a fluidized bed dryer and/or a flow dryer in the production of thermoplastic ASA molding materials for reducing the content of residual monomers. The invention further provides ASA molding materials producible by means of the process according to the invention and also moldings.

Process for producing ASA plastics

Method for producing a thermoplastic moulding compound containing: up to 40 wt. % of a graft copolymer A, containing 50-70 wt. % graft base A1 from an acrylic ester polymer and 30-50 wt. % of a graft shell A2, and 0-90 wt. % of a hard matrix B, wherein the reaction for producing the graft copolymer A is carried out in the presence of 0.01 to 4 times the molar amount of sodium carbonate, relative to the molar amount of initiator, wherein the reaction for producing copolymer A is carried out in the presence of 0.1 to 1 wt. % of an emulsifier relative to the amount of the respective monomers used, and wherein during the polymerisation reaction, during the post-polymerisation and/or after the polymerisation reaction, water or an aqueous alkali solution are added to the reaction mixture for producing the graft copolymer A.

Method for producing acrylate rubber at reduced emulsifier concentration

The invention relates to a process for the production of thermoplastic moulding compounds, in particular for the production of acrylonitrile-butadiene-styrene (ABS), wherein at least a first reagent () and a second reagent () of the thermoplastic moulding compounds are fed to a loop conduit () which comprises a static mixer (), wherein the reagents () are pressed in loops through the loop conduit () and passing the static mixer (), whereby the reagents () are dispersed to form a dispersion () in the static mixer (). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.

Process for the production of thermoplastic moulding compounds

A method for producing a thermoplastic moulding compound by means of an extruder (), which comprises at least one feed zone (), at least one mixing section (), at least one venting section () and at least one discharge zone (), wherein in the at least one feed zone () a water-containing first component and a second component are supplied, in the at least one mixing section () the thermoplastic moulding compound is mixed and contained water is evaporated, in the at least one venting section () water vapour is removed from the moulding compound and in the at least one discharge zone () the moulding compound is discharged. At least one of the mixing housings () is kept at a temperature that is equal to or lower than the temperature of the moulding compound within the mixing section ().

Method for producing a thermoplastic moulding compound

The invention relates to a process for the production of thermoplastic moulding compounds, in particular ABS, wherein at least a first reagent () and a second reagent () of the thermoplastic moulding compounds are fed to a gear pump () which comprises a housing and at least a first gear wheel that is rotatable relative to the housing about a first axis, and a second gear wheel that is rotatable relative to the housing about a second axis, wherein a loop conduit () is provided, and wherein the reagents () are pressed in a loop through the loop conduit () and passing the gear wheels, whereby the reagents () are dispersed to form a dispersion () in the gear pump (). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.

A process for producing a thermoplastic molding composition comprising: 10% to 40% by weight of a graft copolymer A comprising 50% to 70% by weight, based on A, of a graft base A1 formed from an elastomeric, crosslinked acrylic ester polymer and 30% to 50% by weight of a graft shell A2, 50% to 90% by weight of a hard matrix B formed from copolymers of styrene or &#x3b1;-methylstyrene and acrylonitrile, 0% to 50% by weight of a further graft copolymer C, 0% to 15% by weight of additives D, wherein the reaction for preparation of the acrylic ester polymer A and/or the reaction for preparation of C is conducted in the presence of 0.01 to 4 times the molar amount of sodium carbonate, based on the sum total of the molar amount of initiator used in the preparation of the graft base and graft shell, leads to lower coagulate formation.

Process for producing acrylate rubber with reduced coagulate formation

The invention relates to a thermoplastic molding composition which comprises at least one copolymer component made of styrene monomers and nitrile monomers, and also at least one graft copolymer based on an acrylate rubber. The invention also relates to thermoplastic moldings produced from the thermoplastic molding composition, and the use thereof.

Thermoplastic moulding compositions with appropriately designed graft shell

A process for preparing a thermoplastic polymer composition or a thermoplastic polymer blend, comprising: &#x2014;from 20 to 80% by weight of at least one water-moist elastomer component A containing up to 40%, preferably up to 30% by weight of residual water, &#x2014;from 20 to 80% by weight of at least one thermoplastic polymer B, &#x2014;from 0 to 40% by weight of at least one further polymer C, and &#x2014;from 0 to 60% by weight of additive(s) D, by mixing the elastomer component A with the thermoplastic polymer B and, if present, the further polymer C and, if present, the additive(s) D in an extruder, comprising the steps of precipitating the elastomer component A, and mechanical dewatering of the elastomer component A leads to improved salt-free products.

Process for the manufacturing of ABS-molding compositions

Growing community of inventors

Meerbusch, Germany

Wolfgang Fischer