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

Stefan Nau

Eric Reinheimer

Lukas Friedrich Doessel

Rüdiger Carloff

Roger Recktenwald

Nils Mehler

Dominic Stoerkle

Krzysztof Sado

Marc Poth

Ernst Becker

Anton Halblaender

Antonios Manis

Sabine Schwarz-Barac

Christian Roth

Zhen Zhu

Andreas Mischlich

Werner Hoss

Reiner Muller

Markus Vogt

Lukas Friedrich DÖSSEL

Reiner MÜLLER

Werner HÖSS

Dominic STÖRKLE

Markus Schubert

Carlo Schütz

Anton Halbländer

Dominic Storkle

Lukas Friedrich Dossel

Anton Halblander

Birgit Riedel-Bendzko

Joachim Henn

Daniel Cleff

Norbert Bendzko

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

Growing community of inventors

Frankfurt-am-Main, Germany

Victor Khrenov