Roehm Gmbh & Co Kg

Evonik Operations Gmbh

Roehm Gmbh Chemische Fabrik Patentabteilung

Evonik Roehm Gmbh

Röhm Gmbh & Co. Kg

Evonik Rohm Gmbh

Patrik Hartmann

Bardo Schmitt

Steffen Krill

Thorben Schütz

Marcel Treskow

Marita Kaufmann

Andrea Wittkowski

Martina Bader

Gerhard Schwinn

Joachim Knebel

Wolfgang Klesse

Martin Trocha

Gerold Schmitt

Volker Kerscher

Ralf Merbach

Silvia Beyer

Volker Herzog

Sabine Kömmelt

Hans-Jürgen Dillmann

Gaurang Dave

Reinhold Martin

The present invention is to storage-stable compositions containing glycerol (meth)acrylate carboxylic esters, carboxylic acids and, optionally, Broensted acids.

Glycerol (meth)acrylate carboxylic ester having a long shelf life

The present invention describes storage-stable glycerol (meth)acrylate carboxylic esters and a method for preparing these esters.

A process produces a (meth)acrylate ester mixture. The process includes reacting a glycerol formal isomer mixture with an alkyl (meth)acrylate in the presence of a catalyst.

Method for producing monomers from isomeric mixtures

N,N-(di)alkylaminoalkyl(meth)acrylamide or N,N-(di)alkylaminoalkyl (meth)acrylate and/or a quaternary ammonium salt thereof are prepared with a low content of a compound of formula (IV) wherein Rin each case is a linear, branched or cyclic alkyl radical, an aryl radical which may also be substituted by one or more alkyl groups, the linear, cyclic or branched alkyl radical may have a length of 1-12 carbon atoms and is, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, hexyl, heptyl, octyl, isooctyl, nonyl, decyl, undecyl, dodecyl.

Preparation of N,N-(di)alkylaminoalkyl(meth)acrylamide or N,N-(di)alkylaminoalkyl (meth)acrylate and the quaternary ammonium salts thereof as flocculating aids and gelling agents

The present invention relates to mixtures for preparing transparent plastics, encompassing 

Mixture for the production of transparent plastic materials, transparent plastic materials, and method for the production and use thereof

The invention relates to mixtures for producing transparent plastic, which mixtures comprise: a) compounds of formulae (I) and (II), wherein Rindependently represents hydrogen or a methyl group, Rindependently represents a linear or branched, aliphatic or cycloaliphatic group or a substituted or unsubstituted aromatic or heteroaromatic group and m and n independently represent an integer &#x2267;0, with m+n&#x3e;0, b) a prepolymer produced from polymethacrylate and alkyldithiols or polythiols, preferably HS&#x2014;R&#x2014;SH (III), wherein Ris the same or different from Rand may have the definition of R, and c) aromatic vinyl compounds.

Mixtures for producing transparent plastics, transparent plastics and method for producing the same and the use thereof

Mixtures for producing transparent plastics, transparent plastics, method for producing the same and the use thereof

The invention relates to mixtures for producing transparent plastics, comprising a) a prepolymer, produced from the compounds of formulae (I) and (II), wherein Rindependently represents hydrogen or a methyl group, Rindependently represents a linear or branched, aliphatic or cycloaliphatic group or a substituted or unsubstituted aromatic or heteroaromatic group and m and n independently represent an integer greater or equal 0, with m+1&#x3e;0, and compounds of formula (III), alkyldithiols or polythiols, preferably HS&#x2014;R&#x2014;SH (III), wherein Ris equal or different from Rand can have the meaning indicated in R, and b) at least one radically polymerizable monomer (A) having at least two methacrylate groups and c) aromatic vinyl compounds, such as styrene and d) optionally a radically polymerizable monomer having at least two terminal olefinic groups that have different reactivity, and/or e) optionally at least one monomer (B) from the group of methacrylates, preferably 2-hydroxyethylmethacrylate.

Mixtures for producing transparent plastics, transparent plastics and method for their production and use

The present invention relates to mixtures containing  The present invention further relates to processes for polymerizing these mixtures, the highly transparent polymers thus obtainable and to their use.

Highly transparent plastic for optical materials

The invention relates to a method of producing (meth)acryloylthio esters of general formula I ##STR1## where R represents hydrogen or methyl, and R.sup.1 represents a phenyl group, a substituted phenyl group, a C.sub.1-24 alkyl group, a substituted C.sub.1-24 alkyl group, a cyclic C.sub.3-24 alkyl group; comprising reacting (meth)acrylic acid anhydride (formula II) ##STR2## where R represents hydrogen or methyl, with at least the stoichiometric amount with a thiol or thiolate of formula III

Method of manufacturing a (meth)acryloylthio compound

The invention relates to sulfur-containing polymethacrylates P produced by radical polymerization of monomers of formula I: ##STR1## where Y represents a C.sub.2-12 alkyl group, a C.sub.2-12 branched alkyl group, a C.sub.3-12 cyclic alkyl group, a C.sub.6-14 aryl group, or a C.sub.7-26 alkaryl group, wherein the carbon chains of Y may be interrupted by one or more ether or thioether groups; and

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Buettelborn, Germany

Patrik Hartmann