Roehm Gmbh

Senoplast Klepsch & Co., Gmbh

Evonik Roehm Gmbh

Roehm Gmbh & Co Kg

Roehm Gmbh Chemische Fabrik

Mona Rueppel

Michael Wicker

Klaus Albrecht

Klaus Schultes

Eric Reinheimer

Johann Kappacher

Gabriele Dassinger

Werner Hoess

Uwe Numrich

Reiner Mueller

Thomas Rhein

Johannes Vorholz

Andreas Weber

Michael May

Marcus Denger

Norbert Hoffmann

Dominic Stoerkle

Wolfgang Fuchs

Ernst Mohr

Hermann Jaksch

Andreas Hoellebauer

Andreas Hollebauer

Tony Halblaender

Gerald Dietrich

Melanie Jungkamp

The present invention relates to a continuous or semi-continuous freeze coagulation process for aqueous polymer dispersions, wherein said process comprises a freezing step and a solid-liquid separation step and is further characterized in that it comprises the further step of admixing water and/or water vapor between the freezing step and the solid-liquid separation step.

Continuous or semi-continuous freezing coagulation method for aqueous polymer dispersions

The invention relates to a multilayer film encompassing at least one upper layer a) and one middle layer b) composed of (meth)acrylate copolymers, and also a backing layer c) composed of polycarbonate, where the upper layer a) comprises a light stabilizer and is composed of a (meth)acrylate copolymer which can form semicompatible mixtures with the polycarbonate of the backing layer c), where a test specimen produced from a mixture composed of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate has a tensile strain at break of at least 75% (ISO 527-2) at 23&#xb0; C., the middle layer b) comprises a dye and, where appropriate, a light stabilizer, and is composed of an identical or different (meth)acrylate copolymer which can form semicompatible mixtures with the polycarbonate of the backing layer c), where a test specimen produced from a mixture composed of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate has a tensile strain at break of at least 75% (ISO 527-2) at 23&#xb0; C., and the backing layer c) is composed of polycarbonate which can, where appropriate, comprise up to 30% by weight of the material of the layers a) and b). The invention also relates to the production and uses of the multilayer film, and also to semicompatible polymer mixtures composed of (meth)acrylate copolymers and polycarbonate.

Multilayered film made of (meth)acrylate copolymer and polycarbonate

The invention relates to a multilayered film comprising at least one upper layer a), a middle layer b) made of (meth)acrylate copolymer, and a supporting layer c) made of polycarbonate. Upper layer a) contains a light-stability agent and is made of a (meth)acrylate copolymer that, together with the polycarbonate of supporting layer c), can form partially compatible mixtures. A test piece, which is made from a mixture consisting of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate, has a breaking elongation (ISO 527-2) of at least 75% at 23&#xb0; C. The middle layer b) contains a colorant and, optionally, a light-stability agent and is made from an identical or different (meth)acrylate copolymer that, together with the polycarbonate of supporting layer c), can form partially compatible mixtures. A test piece, which is made from a mixture consisting of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate, has a breaking elongation (ISO 527-2) of at least 75% at 23&#xb0; C., and the supporting layer c) is made of polycarbonate that, optionally up to 30% by weight of the material of the layers, can contain a) and b). The invention also relates to the production and uses of the multilayered film and to partially compatible polymer mixtures consisting of (meth)acrylate copolymer and polycarbonate.

The invention relates to a polymer mixture based on the (meth)acrylate (co)polymer components a), b), c), and/or d) according to claim 1, where a test specimen produced from the polymer mixture simultaneously has the following properties:

Polymer mixture and the utilization thereof for injection molded parts

The invention concerns a mixture or polymer composite of a copolymer (CP) comprising between 70 and 99.9 wt % methylmethacrylate, between 0.1 and 5 wt % maleic acid anhydride and between 0 and 25 wt % further vinylically copolymerizable monomers which, apart from the vinyl function, have no further function groups, with a polymethacrylate-compatible plastics (VK) and a polymer (PN) which contains at least one terminal nucleophilic groups.

(Methyl) methacrylate maleic acid anhydride copolymers as polymer modifying agents for plastics and mixtures and polymer composites produced therewith

A thermoplastic polymethacrylate molding material with a high degree of thermal dimensional stability, a high degree of transparency, a high degree of flowability and a high degree of resistance against water, monomeric methylmethacrylate, mixtures consisting of ethanol and water, as well as fuel, wherein the molding material is a compatible mixture of 1 to 99 wt % of a copolymer P, made from (p1) 30 to 70 wt % styrene and/or .alpha.-methylstyrene, (p2) 29 to 70 wt % (C.sub.1 -C.sub.6 -alkyl)methacrylate, and (p3) 1 to 20 wt % acrylic acid and/or methacrylic acid, the sum of (p1), (p2), and (p3) adding up to 100 wt %, and 99 to 1 wt.-parts of a polymethylmethacrylate polymer PM, made of (pm1) 80 to 100 wt % methylmethacrylate, as well as (pm2) 0 to 20 wt % monomers which can be copolymerized with methylmethacrylate.

Thermoplastic molding materials having high transparency prepared from

Growing community of inventors

Hoechst, Germany

Mona Rueppel