Evonik Roehm Gmbh

Evonik Rohm Gmbh

Evonik Degussa Gmbh

Victor Khrenov

Klaus Schultes

Werner Hoess

Klaus Albrecht

Kathrin Lehmann

Reiner Mueller

Ursula Golchert

Thorsten Goldacker

Eric Reinheimer

Nils Mehler

Rüdiger Carloff

Lukas Friedrich Doessel

Roger Recktenwald

Stefan Nau

Krzysztof Sado

Ernst Becker

Dominic Stoerkle

Marc Poth

Anton Halblaender

Antonios Manis

Christian Roth

Sabine Schwarz-Barac

Andreas Mischlich

Zhen Zhu

Birgit Riedel-Bendzko

Joachim Henn

Anton Halblander

Lukas Friedrich Dossel

Werner Hoss

Reiner Muller

Markus Vogt

Dominic Storkle

Lukas Friedrich DÖSSEL

Reiner MÜLLER

Werner HÖSS

Dominic STÖRKLE

Daniel Cleff

Carlo Schütz

Norbert Bendzko

Markus Schubert

Anton Halbländer

The invention relates to a molding composition modified for impact resistance, in particular to impact-resistant PMMA with improved optical properties at elevated temperatures, to molded items obtainable therefrom, and also to the use of the molding composition and of the molded items.

PMMA provided with impact resistance and having improved optical properties

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

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

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Frankfurt-am-Main, Germany

Victor Khrenov