Roehm Gmbh & Co Kg

Evonik Roehm Gmbh

Evonik Rohm Gmbh

Universitéde Montreal

Roehm Gmbh

Senoplast Klepsch & Co., Gmbh

Cps Gmbh

Röhm Gmbh & Co. Kg

Evonik Degussa Gmbh

Klaus Schultes

Werner Hoess

Klaus Albrecht

Thomas Suefke

Michael Wicker

Hans-Ulrich Petereit

Christian Meier

Reiner Mueller

Ursula Golchert

Thorsten Goldacker

Nils Mehler

Mona Rueppel

Eric Reinheimer

Jean-Christophe Leroux

Markus Parusel

Klaus Koralewski

Guenter Schmitt

Ghirmay Seyoum

Johann Kappacher

Hans-Juergen Kress

Arne Schmidt

Stefan Nau

Thomas Arndt

Victor Khrenov

Peter Battenhausen

Joachim Laatsch

Andreas Spiess

Gabriele Dassinger

Goerg Michler

Uwe Numrich

Kathrin Lehmann

Michael Wicke

Hartmut Schikowsky

Juergen Hartmann

Helmut Schwind

Günter Schmitt

Theodor Mager

Michael Enders

Rudolf Blass

Thomas Arnold

Roger Recktenwald

Rüdiger Carloff

Marc Poth

Thomas Boller

Michael Zietek

Sven Schroebel

Ernst Becker

Winfried Belzner

Krzysztof Sado

Christian Roth

Stefan Menzler

Wolfgang Fuchs

Antonios Manis

Christian Eberle

Guenther Schmitt

Peter Kempf

Sabine Schwarz-Barac

Elevtherios Gross

Marie-Andree Yessine

Erwin Felger

Anton Halblaender

Andreas Kluge

Simon Becht

Adalbert Loidl

Stefan Grimm

Michael Schnabel

Andreas Hoellebauer

Andreas Hollebauer

Tony Halblaender

Johanna Eisele

Jürgen Grönen

Andreas Olschewski

Martin Mohrmann

Andreas Mischlich

Zhen Zhu

Guomin Liu

Thomas Wick

Michael Jucys

Elisabeth Clamer

Werner Höβ

Werner Höss

Norbert Bendzko

Manuel Kaiser

Viola Rosner

Daniel Cleff

Sven Strohkark

Sabrina Thomas

Jurgen Gronen

Anton Halblander

The present invention relates to a process for producing colored plastics molding compositions with aqueous liquid colors, where an aqueous liquid color is added to a molten plastics molding composition. The present invention also describes a system for conducting the said process.

Process and system for colouring plastics moulding compositions

A reactive mixture for coating mouldings by means of reaction injection moulding, containing at least 40% by weight of (meth)acrylates having at least two double bonds. The reactive mixture contains at least one photoinitiator and at least one thermal initiator. The present invention furthermore describes a coated moulding including a moulding which is obtainable by injection moulding processes and includes at least one polymer selected from polymethyl methacrylate, polymethylmethacrylimide, styrene-acrylonitrile copolymer, styrene-maleic acid copolymer and polymethyl methacrylate copolymers, and a coating which is obtainable by polymerization of (meth)acrylates having at least two double bonds. The coating has an adhesive strength rating of not more than 1 according to the cross hatch test and a decrease in gloss at 20&#xb0; after a scratch resistance test according to ASTM 1044 (12/05) (applied weight 500 g, number of cycles=100) of not more than 10%.

Reactive mixture for coating molded objects by means of reaction injection molding and coated molded object

The invention describes a transparent plastics composite composed of PMMA and TPU with excellent mechanical properties.

Transparent plastic composite

A reactive mixture for coating moldings by reaction injection molding includes at least 40% by weight of (meth)acrylates having at least two double bonds. The reactive mixture also includes at least one photoinitiator and at least one thermal initiator. Furthermore, a coated molding includes a molding obtainable by injection molding processes. The molding includes polymethyl methacrylate, polymethylmethacrylimide, styrene-acrylonitrile copolymer, styrene-maleic acid copolymer, polymethyl methacrylate copolymer, or a combination thereof. A coating is obtainable by polymerization of (meth)acrylates having at least two double bonds, the coating having an adhesive strength rating of not more than 1 according to the cross hatch test and a decrease in gloss at 20&#xb0; after a scratch resistance test according to ASTM 1044 (12/05) (applied weight 500 g, number of cycles=100) of not more than 10%.

A molding compound comprises a copolymer (I)a), produced by polymerization of 90-100% by weight methylmethacrylate, styrene and malic acid anhydride, and optionally 0-10% by weight additional monomers which can be copolymerized with methylmethacrylate, a (co)polymer (II)b), produced by polymerization of 80-100% by weight methylmethacrylate and optionally 0-20% by weight additional monomers which can be copolymerized with methylmethacrylate, and has a solution viscosity in chloroform at 25&#xb0; C. (ISO 1628 Part 6) of 50 to 55 ml/g, as well as c) optional conventional additives, auxiliary agents and/or fillers. The molding compound is characterized in that the copolymer (I) has a solution viscosity in chloroform at 25&#xb0; C. (ISO 1628 Part) of 55 ml/g or less. Also disclosed are moldings produced by thermoplastic processing of the molding compound and their uses.

Moulding compound for mouldings with high weather resistance

The present invention relates to weathering-resistant, colored moldings made of poly(alkyl)(meth)acrylate with improved gloss and resistance to mechanical influences acting on the surface of the molding, in particular with improved wipe resistance and improved scratch resistance, and also to molding compositions for producing the same.

Weathering-resistant, colored moldings with improved gloss and wipe resistance

The present invention relates to a plastics molding composition encompassing at least one poly(meth)acrylate A) and at least one impact-modified poly(meth)acrylate B), wherein the die swell of the plastics molding composition is at least 15%, measured at 5 MPa and 2200C to DIN 54811 (1984), and the melt flow rate of the poly(meth)acrylate A) is at least 10 ml per 10 minutes, measured to ISO 1133 at 2300C with a load of 3.8 kg. The present invention also describes moldings which encompass the plastics molding composition described above, and processes for the production of the said moldings.

Plastics moulding compositions, and mouldings and production processes

The invention describes transparent plastics mixtures having low-temperature impact resistance composed of a thermoplastic polyurethane (TPU) and of an impact-modified poly(meth)acrylate (PMMA).

Transparent TPU (thermoplastic polyurethanes)/PMMA (polymethyl (meth) acrylate) blends with improved low-temperature impact resistance

The invention relates to an injection molding method for the production of a complex, high optical quality light-diffusing molded item. The molding material used comprises a matrix made of polymethyl(meth)acrylate and spherical plastic particles whose particle size ranges from 1-24 &#x3bc;m and the concentration thereof ranges from 0.05-30 wt.-% in relation to the weight of the polymethyl(meth)acrylate. The spherical particles exhibit a refractive index differential in relation to the polymethyl(meth)acrylate matrix of 0.01 0.2.

Method for the production of light-diffusing moulded items with excellent optical characteristics

Process for preparing molding materials MM with improved optical and color properties, consisting of a polymer PM which contains units of the formula I in which Rand Rare each hydrogen and methyl and Ris hydrogen, C-C-alkyl, C-C-cycloalkyl, C-C-aryl, C-C-aryl-C-C-alkyl, where these radicals may be up to trisubstituted by radicals selected from the group consisting of C-C-alkoxy and halogen, prepared in an imidation reaction known per se in a reactive extruder,in which, on completion of the imidation reaction, an amount of one or more reducing phosphorus compounds P which is effective for color stabilization is added to the polymer PM, characterized in that the phosphorus compounds are organic phosphorus compounds OP selected from the group consisting of compounds of the formula II in which Rand Rare each independently hydrogen or an aromatic 6-membered ring which may be up to pentasubstituted by a C-C-alkyl and/or C-C-cycloalkyl groups. Shaped bodies obtainable by the process, especially light waveguides, have a low tendency to yellowing under thermal stress, coupled with a low haze, and also a stable and high transparency.

Poly(meth)acrylimide having improved optical and color properties, particularly under thermal load

Provided is a molding composition comprising, based on the total weight of the composition, (A) 50.0% by weight to 99.5% by weight of at least one (co)polymer which is a homopolymer or copolymer of at least 80% by weight of methyl methacrylate, (B) 0.5% by weight to 50.0% by weight of at least one copolymer obtained by polymerization of a monomer, and (C) at least one low molecular weight (meth)acrylate (co)polymer having a solution viscosity in chloroform at 25&#xb0; C. (ISO 1628&#x2014;part 6) of less than or equal to 55 ml/g.

Composition with increased stress cracking resistance

The invention relates to the use of polyalkyl(meth)acrylate bead polymers with an average particle size Vthat ranges between 30 and 70 &#x3bc;m for improving the stress cracking resistance of moulding materials containing polyalkyl(meth)acrylate. The invention also relates to moulding materials comprising: a) at least 50 wt. % of an impact resistance modifying agent, which contains at least one polyalkyl(meth)acrylate phase; b) at least 8 wt. % of a polyalkyl(meth)acrylate bead polymer with an average particle size Vthat ranges between 30 and 70 &#x3bc;m; and c) between 0 and 42 wt. % of a polyalkyl(meth)acrylate with a molecular weight ranging between 20,000 and 350,000 g/mol, whereby the wt. % of the components a) to c) amounts to 100 wt. %, and to moulded bodies that can be obtained from said materials.

Use of polyalkyl(meth)acrylate bead polymers and moulding material for producing extruded moulded parts with a matt surface

The invention relates to subduedly colored (brown, gray, black, green), infrared reflecting PMMA compounds which can be applied to other plastic compounds as an IR barrier layer.

Methods of making a opaquely dark colored molding composition

Composition containing, based in each case on its total weight, The moldings obtainable from the composition are distinguished in particular by improved stress cracking resistance and are suitable in particular for coverings, finishes or films.

The invention relates to a composition containing, in relation to the total weight of said composition, A) between 50.0% by weight and 99.5% by weight of at least one (meth)acrylate (co)polymer and B) between 0.5% by weight and 50.0% by weight of at least one copolymer, obtained by the polymerization of a monomer mixture consisting of i. between 70% by weight and 92% by weight of a vinyl aromatic monomer and ii. between 8% by weight and 30% by weight of acryl nitrile or methacryl nitrile or mixtures thereof iii. between 0% by weight and 22% by weight of at least one other monomer, the composition having at 50&#xb0; C. a &#x394;E of less than 0.15, &#x394;E being defined according to the relationship (1): (1) in which &#x394;L*: the modification of the color co-ordinates L* compared with the color co-ordinates L* at 23&#xb0; C., &#x394;a*: the modification of the color co-ordinates a* compared with the color co-ordinates a* at 23&#xb0; C., &#x394;b*: the modification of the color co-ordinates b* compared to the color co-ordinates b* at 23&#xb0; C., and the composition contains at least one (meth)acrylate (co)polymer a) with a solution viscosity in chloroform at 25&#xb0; C. (ISO 1628 part 6) greater than 55 ml/g. The molded bodies that can be obtained from the composition are characterized in particular by improved stress cracking resistance and are suitable in particular for use in coatings, paints or films.

Coloured composition with increased stress cracking resistance

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Wiesbaden, Germany

Klaus Schultes