Roehm Gmbh & Co Kg

Evonik Roehm Gmbh

Roehm Gmbh Chemische Fabrik

Roehm Gmbh

Rohm Gmbh

Thomas Suefke

Klaus Schultes

Reiner Mueller

Hans-Ulrich Petereit

Christian Meier

Werner Siol

Ulrich Terbrack

Werner Hoess

Markus Parusel

Thomas Rhein

Roger Recktenwald

Thomas Arndt

Thomas Boller

Joachim Laatsch

Stefan Grimm

Goerg Michler

Michael Schnabel

Uwe Numrich

Michael Wicker

Guenter Schmitt

Hartmut Schikowsky

Winfried Belzner

Stefan Menzler

Ingrid Blesing

Johanna Eisele

Volker Kerscher

The present invention relates to a process for preparing aqueous dispersions. The invention also relates to the formation of core-shell particles in aqueous dispersions. The core-shell particles are useful as impact-modifiers for poly(meth)acrylate moulding compositions.

Process for preparing aqueous dispersions

The invention relates to a method for producing a pharmaceutical dosage form as tablets, pellets and/or in the form of an active ingredient-containing matrix, whereby the tablets, pellets and/or active ingredient-containing matrix contain a pharmaceutical active ingredient and a copolymer serving as a coating agent and/or binding agent, and optionally contain a core and pharmaceutically common additives. According to the invention, the copolymer, the pharmaceutical active ingredient, the optionally present core and/or the pharmaceutically common additives are processed using known techniques by melting, injection molding, extrusion, wet granulation, casting, dipping, spreading out, spraying on, or pressing to form tablets, pellets and/or an active ingredient-containing matrix. The inventive method is characterized in that a copolymer is used that consists of 20 to 34 wt. % methacrylic acid, 20 to 69 wt. % methylacrylate and 0 to 40 wt. % ethylacrylate and, optionally, of 0 to 10 wt. % of additional vinylically copolymerizable monomers with the provision that the glass transition temperature of the copolymer is no higher than 60&#xb0; C. according to ISO 11357-2, Item 3.3.3. The invention also relates to the pharmaceutical dosage form produced according to this method, said copolymer and the use thereof.

Pharmaceutical dosage form and method for the production thereof

The invention describes a novel impact modifier, built up from core-shell1- and shell 2, the core being capable of plastic deformation. Good mechanical properties were achieved using a small amount of impact modifier.

PMMA moulding compounds with improved impact resistance

The invention relates to a macroporous plastics bead material with an average particle diameter from 10 to 1000 &#x3bc;m, containing a copolymer of a) 5-60 wt. % vinylically polymerizable monomers with a water solubility of at least 1% at 20&#xb0; C., b) 1-40 wt. % vinylically polymerizable monomers with an additional functional group, which can enter into covalent bonds with the nucleophilic groups of the ligands in a polymer-like reaction, c) 10-40 wt. % hydrophilic, crosslinking radical-polymerizable monomers with two or more ethylenically unsaturated polymerizable groups and d) 10-60 wt. % vinylically polymerizable monomers with a water solubility of at most 1% at 20&#xb0; C. are contained, as a rule with the monomers a) to d) adding up to 100%.

Macroporous material in the form of plastic pearls

The invention relates to a novel impact-resistance modifier, constructed from a core-shell 1 and a shell 2, whereby the core is plastically deformable. The invention is characterised by excellent mechanical properties obtained by a low content of impact-resistance modifier.

The invention relates to a process for synthesis, by inverse bead polymerization of a monomer phase, of a bead-like, cross-linked, hydrophilic copolymer which has binding activity toward ligands containing nucleophilic groups. The invention relates to support polymer materials with high binding capacity for penicillin acylase and low swelling factor, as well as to use of the same.

Process for synthesis of bead-shaped cross-linked hydrophilic support polymer

The invention relates to a dispersion suitable for use as coating agent and binder for pharmaceutical forms, having a solids content of 10&#x2013;70% by weight consisting of

Dispersion comprising a non-ionic emulsifier

Process for preparing bead polymers with an average particle size in the range from 1 to 40 &mgr;M, moulding compositions comprising bead polymer, and mouldings and PAMA plastisols

Moulding compositions with diffusing properties and mouldings obtainable from these

The invention relates to reactive polysols with a reactive monomer portion which is polymerized during thermal coating. The polysols exhibit good mechanical properties. A monofunctional (meth)acrylate monomer of formula (1) is used as reactive monomer component.

Materials which can be thermally coated with a polymerizable component

Highly transparent, impact-resistant molding compositions based on polymethyl methacrylate (PMMA), having excellent color stability both during processing at high temperatures, as well as when under thermal stress, as a result of multiple processing with simultaneously high weathering stability and stability of the optical characteristics with the effect of water. Preparation is carried out according to a multi-step extruder process, wherein an extruder for the melt coagulation and one for the compounding are connected in series. Addition of small quantities of reducing inorganic phosphorous compounds at a later stage provides prolonged effectiveness.

Color-stable, weather-, and impact-resistant molding compositions based

An emulsion polymer having at least three phases, adaptable as an agent for modifying the impact resistance of rigid thermoplastic synthetic resins such as polymethyl methacrylate, and consisting of

Material for modifying impact resistance

Thermoplastically processable polymer mixtures with high solvent resistance. The polymer mixtures are made up of

Thermoplastically processable solvent-resistant polymer mixtures

Polymer mixtures

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Erzhausen, Germany

Thomas Suefke