Roehm Gmbh & Co Kg

Evonik Rohm Gmbh

Evonik Roehm Gmbh

Roehm Gmbh Chemische Fabrik

Rohm Gmbh

Roehm Gmbh

Werner Hoess

Klaus Schultes

Klaus Albrecht

Hartmut Schikowsky

Michael Wicker

Heinz Vetter

Reiner Mueller

Hans-Juergen Kress

Rudolf Blass

Nils Mehler

Michael Zietek

Klaus Koralewski

Thomas Suefke

Thomas Hasskerl

Arne Schmidt

Lukas Friedrich Doessel

Krzysztof Sado

Wolfgang Fuchs

Hans-Ulrich Petereit

Harald Haeger

Guenter Schroeder

Klaus Lehmann

Jens-Dieter Fischer

Markus Parusel

Ghirmay Seyoum

Thomas Beckert

Ursula Golchert

Manfred Assmus

Thorsten Goldacker

Mona Rueppel

Michael Enders

Roland Reiner

Stefan Nau

Roger Recktenwald

Eric Reinheimer

Sven Schroebel

Victor Khrenov

Dominic Stoerkle

Peter Battenhausen

Manfred Brehm

Alexander Theil

Christian Eberle

Andreas Spiess

Erwin Felger

Elevtherios Gross

Sabine Schwarz-Barac

Heinrich Gaul

Guomin Liu

Martin Mohrmann

Florian Band

Tony Halblaender

Harry Schwarz

Julian Klitsch

Joachim Dutschke

Tony Halbländer

The invention relates to an impact-modified molding composition, especially impact-modified PMMA, having an improved profile of properties, especially also at elevated temperatures, to molded articles obtainable therefrom and to the use of the molding composition and the molded article.

Impact-resistant molding material having an improved characteristics profile

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

Provided is an adhesive composition suitable for producing a laminate. The composition contains specified amounts of (a) polyisobutyl methacrylate, isobutyl methacrylate or a mixture thereof, (b) butyl acrylate, (c) polybutyl acrylate, (d) a (meth)acrylate compound and (e) a silicon compound. These components may be in polymerizable form, in polymerized form or in a combination of polymerizable form and polymerized form. The amounts of components (a) to (e) total 100 wt. % and the amount of (b) and (c) represents 30 to 90 wt. %, based on the sum total of components (a) to (e). The composition may optionally further contain from 0.1 to 6 wt. %, based on the total weight of the adhesive composition, of additives different from components (a) to (e) described above.

Adhesive for producing composite bodies, a plastic glass composite or composite glass for architecture and construction

The invention describes a transparent plastics composite composed of PMMA and TPU with excellent mechanical properties.

Transparent plastic composite

A reactive mixture for coating moldings by reaction injection molding includes at least 40% by weight of (meth)acrylates having at least two double bonds. The reactive mixture also includes at least one photoinitiator and at least one thermal initiator. Furthermore, a coated molding includes a molding obtainable by injection molding processes. The molding includes polymethyl methacrylate, polymethylmethacrylimide, styrene-acrylonitrile copolymer, styrene-maleic acid copolymer, polymethyl methacrylate copolymer, or a combination thereof. A coating is obtainable by polymerization of (meth)acrylates having at least two double bonds, the coating having an adhesive strength rating of not more than 1 according to the cross hatch test and a decrease in gloss at 20&#xb0; after a scratch resistance test according to ASTM 1044 (12/05) (applied weight 500 g, number of cycles=100) of not more than 10%.

Reactive mixture for coating molded objects by means of reaction injection molding and coated molded object

A molding compound comprises a copolymer (I)a), produced by polymerization of 90-100% by weight methylmethacrylate, styrene and malic acid anhydride, and optionally 0-10% by weight additional monomers which can be copolymerized with methylmethacrylate, a (co)polymer (II)b), produced by polymerization of 80-100% by weight methylmethacrylate and optionally 0-20% by weight additional monomers which can be copolymerized with methylmethacrylate, and has a solution viscosity in chloroform at 25&#xb0; C. (ISO 1628 Part 6) of 50 to 55 ml/g, as well as c) optional conventional additives, auxiliary agents and/or fillers. The molding compound is characterized in that the copolymer (I) has a solution viscosity in chloroform at 25&#xb0; C. (ISO 1628 Part) of 55 ml/g or less. Also disclosed are moldings produced by thermoplastic processing of the molding compound and their uses.

Moulding compound for mouldings with high weather resistance

The present invention relates to a plastics molding composition encompassing at least one poly(meth)acrylate A) and at least one impact-modified poly(meth)acrylate B), wherein the die swell of the plastics molding composition is at least 15%, measured at 5 MPa and 2200C to DIN 54811 (1984), and the melt flow rate of the poly(meth)acrylate A) is at least 10 ml per 10 minutes, measured to ISO 1133 at 2300C with a load of 3.8 kg. The present invention also describes moldings which encompass the plastics molding composition described above, and processes for the production of the said moldings.

Plastics moulding compositions, and mouldings and production processes

The invention relates to an injection molding method for the production of a complex, high optical quality light-diffusing molded item. The molding material used comprises a matrix made of polymethyl(meth)acrylate and spherical plastic particles whose particle size ranges from 1-24 &#x3bc;m and the concentration thereof ranges from 0.05-30 wt.-% in relation to the weight of the polymethyl(meth)acrylate. The spherical particles exhibit a refractive index differential in relation to the polymethyl(meth)acrylate matrix of 0.01 0.2.

Method for the production of light-diffusing moulded items with excellent optical characteristics

Provided is a molding composition comprising, based on the total weight of the composition, (A) 50.0% by weight to 99.5% by weight of at least one (co)polymer which is a homopolymer or copolymer of at least 80% by weight of methyl methacrylate, (B) 0.5% by weight to 50.0% by weight of at least one copolymer obtained by polymerization of a monomer, and (C) at least one low molecular weight (meth)acrylate (co)polymer having a solution viscosity in chloroform at 25&#xb0; C. (ISO 1628&#x2014;part 6) of less than or equal to 55 ml/g.

Composition with increased stress cracking resistance

The invention relates to the use of polyalkyl(meth)acrylate bead polymers with an average particle size Vthat ranges between 30 and 70 &#x3bc;m for improving the stress cracking resistance of moulding materials containing polyalkyl(meth)acrylate. The invention also relates to moulding materials comprising: a) at least 50 wt. % of an impact resistance modifying agent, which contains at least one polyalkyl(meth)acrylate phase; b) at least 8 wt. % of a polyalkyl(meth)acrylate bead polymer with an average particle size Vthat ranges between 30 and 70 &#x3bc;m; and c) between 0 and 42 wt. % of a polyalkyl(meth)acrylate with a molecular weight ranging between 20,000 and 350,000 g/mol, whereby the wt. % of the components a) to c) amounts to 100 wt. %, and to moulded bodies that can be obtained from said materials.

Use of polyalkyl(meth)acrylate bead polymers and moulding material for producing extruded moulded parts with a matt surface

Composition containing, based in each case on its total weight, The moldings obtainable from the composition are distinguished in particular by improved stress cracking resistance and are suitable in particular for coverings, finishes or films.

The invention relates to a composition containing, in relation to the total weight of said composition, A) between 50.0% by weight and 99.5% by weight of at least one (meth)acrylate (co)polymer and B) between 0.5% by weight and 50.0% by weight of at least one copolymer, obtained by the polymerization of a monomer mixture consisting of i. between 70% by weight and 92% by weight of a vinyl aromatic monomer and ii. between 8% by weight and 30% by weight of acryl nitrile or methacryl nitrile or mixtures thereof iii. between 0% by weight and 22% by weight of at least one other monomer, the composition having at 50&#xb0; C. a &#x394;E of less than 0.15, &#x394;E being defined according to the relationship (1): (1) in which &#x394;L*: the modification of the color co-ordinates L* compared with the color co-ordinates L* at 23&#xb0; C., &#x394;a*: the modification of the color co-ordinates a* compared with the color co-ordinates a* at 23&#xb0; C., &#x394;b*: the modification of the color co-ordinates b* compared to the color co-ordinates b* at 23&#xb0; C., and the composition contains at least one (meth)acrylate (co)polymer a) with a solution viscosity in chloroform at 25&#xb0; C. (ISO 1628 part 6) greater than 55 ml/g. The molded bodies that can be obtained from the composition are characterized in particular by improved stress cracking resistance and are suitable in particular for use in coatings, paints or films.

Coloured composition with increased stress cracking resistance

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

(EN) The invention concerns a method for producing a thermoplastic molding material or element, said material or element containing nanometric inorganic particles. In molten state, the thermoplastic is mixed with the nanometric inorganic particles and with a solubilizing agent in a conveyor screw extruder, the pressures and temperatures being adjusted so that the plastic is in melt form and the solubilizing agent in supercritical state. The invention is characterized in that at the output of the extruder, the mixture passes through a slot with a passage less than 20 $g(m)m to penetrate into an expansion zone and the molten material, wherein are incorporated the nanometric inorganic particles, is evacuated, reduced into molding material after cooling or transferred into a molding tool to be molded. The invention also concerns the molding material and the molding elements obtained by this method, as well as the uses thereof.

Thermoplastic molding material and molding elements containing nanometric Inorganic particles for making said molding material and said molding elements, and uses thereof

The present invention relates to a core-shell particle which has a core, a first shell and, where appropriate, a second shell, where: 

Core and shell particle for modifying impact resistance of a mouldable poly (meth) acrylate material

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Werner Hoess