Evonik Operations Gmbh

Roehm Gmbh & Co Kg

Roehm Gmbh

Rohm Gmbh

Evonik Rohm Gmbh

Andrea Wittkowski

Steffen Krill

Marita Kaufmann

Joachim Knebel

Marcel Treskow

Patrik Hartmann

Thorben Schütz

Wolfgang Klesse

Bardo Schmitt

Johannes Vorholz

Benedikt Laux

Andreas Weber

Joachim Carl

Guenter Graeff

Bededikt Laux

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 relates to a process for preparing a poly(meth)acrylic acid, characterized in that a (meth)acrylic acid-containing process stream from (meth)acrolein synthesis is subjected to free-radical polymerization. The invention also relates to the esterification of the polymer obtained to give a homopolymer or copolymer ester, and to the use thereof as additive, flow improver and water reducer.

Concrete flow improvers and water reducers

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

The present invention relates to a process for preparing an unsaturated carboxylic acid anhydride by reacting an unsaturated carboxylic acid and a lower aliphatic carboxylic acid anhydride in the presence of a stabilizer and catalyst that contains a metal salt of an anionic organic compound which has at least one carboxyl group.

Process for manufacturing unsaturated carboxylic acid anhydrides

A process for the synthesis and recovery of di(meth)acrylic acid esters at a high degree of purity. Di(meth)acrylic acid esters are produced by transesterfication of (meth)acrylic acid esters of C to C alcohols with 1,n-diols (where n&gE;3) in the presence of a zirconium catalyst that comprises a chelate of zirconium with a 1,3-dicarbonyl compound. These catalysts can be readily separated or removed from the reaction mixture by precipitation with phosphoric acid, thus providing a convenient and inexpensive method of producing a di(meth)acrylic acid ester with a reduced level of zirconium.

Process for synthesis of Di(meth)acrylic acid esters

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Gross-Umstadt, Germany

Andrea Wittkowski