Rohm Gmbh

Evonik Degussa Gmbh

Evonik Rohm Gmbh

Roehm America LLC

Rüdiger Carloff

Steffen Krill

Belaid Ait Aissa

Florian Zschunke

Franz-Erich Baumann

Wolfgang Lortz

Klaus Schultes

Heinz Vetter

Michael Wicker

Kay Bernhard

Harald Häger

Eric Reinheimer

Gerhard Kölbl

Victor Khrenov

Wilhelm Karnbrock

Uwe Schneider

Christian Roth

Zhong Shen

Werner Höss

Werner Arnold

Olaf Pickenäcker

Chih-Lung Chen

Gerald Dietrich

Carlo Schütz

Chiew-Chiang Haw

A transparent acrylic-based polymer composition has an increased resistance to alcohols, oils and fats. The polymer composition contains: (A) a copolymer of alkyl(meth)acrylates, aromatic vinyl monomer and unsaturated carboxylic acid anhydride; (B) a copolymer containing aromatic vinyl monomer and a vinyl cyanide monomer; and (C) a particulate core-shell type graft copolymer containing a butadiene-based core as a rubbery phase and a copolymer containing alkyl(meth)acrylates and, optionally, aromatic vinyl monomer as a hard phase. The components A and B form a polymer matrix and the particulate core-shell type graft copolymer C is dispersed in said polymer matrix.

Acrylic composition having an increased resistance to alcohols, oils and fats

A process can be used for producing optical molding materials on the basis of methyl methacrylate (MMA). The MMA produced by an optimized method and the molding materials feature in particular a very low yellowness index. This MMA has been produced by direct oxidative esterification of methacrolein. An optimized workup of the reactor output from the oxidative esterification of methacrolein can be used for removing particularly discoloring byproducts. This process moreover has the advantage that fewer demands are placed on plant apparatus configuration.

Process for producing optical molding materials

A process is useful for producing optical molding materials on the basis of methyl methacrylate (MMA), wherein this MMA has been produced by an optimized method and the molding materials feature in particular a very low yellowness index. This MMA has been produced by direct oxidative esterification of methacrolein. In particular, an optimized workup of the reactor output from the oxidative esterification of methacrolein is useful for removing particularly discoloring byproducts. This process moreover has the advantage that fewer demands than described in related art are placed on plant apparatus configuration.

Compositions comprising an organic polymer as the matrix and inorganic particles as the filler and exhibiting in mixture The compositions can be prepared in a number of way, for example, by reprecipitation from the dissolved state or by mixing in an extruder and are used for preparing fibers, films and shaped articles with improved mechanical properties.

Compositions comprising an organic polymer as the matrix and inorganic particles as the filler, process for the preparation thereof and applications of the same

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Darmstadt, Germany

Rüdiger Carloff