Rohm Gmbh

Evonik Roehm Gmbh

Evonik Rohm Gmbh

Liquidpower Specialty Products Inc.

Other

Roehm Gmbh & Co Kg

Roehm Gmbh Chemische Fabrik

Roehm Gmbh

Röhm Gmbh & Co. Kg

Conocophillips Company

Evonik Operations Gmbh

Wolfgang Klesse

Joachim Knebel

Gerold Schmitt

Hubert Rauch

Dieter Tessmer

Werner Siol

Bardo Schmitt

Norbert Suetterlin

Guido Protzmann

Volker Kerscher

Stuart N Milligan

Kenneth W Smith

Ray L Johnston

Timothy L Burden

William Franklin Harris, Jr

Peter J Arndt

Herbert Fink

Peter Quis

Wilhelm Elser

Klaus Langerbeins

Christine Maria Breiner

Theodor Mager

Benedikt Laux

Ralf Merbach

Klaus Gottmann

Wayne R Dreher

Wilhelm Karnbrock

John Hirsh

Marliese Weber

John Wey

Heinz-Jochen Auer

Ulrich Terbrack

Klaus Lehmann

Juergen Christner

Gerhard Markert

Patrik Hartmann

Frank F Hill

Gerhard Koelbl

Dirk Broell

Thomas Kehr

Klaus Frank

Andrea Wittkowski

Doris Saal

Martina Pfirmann

Mario Gomez Andreu

Martina Ebert

Peter Rossberg

Hans-Juergen Geyer

Wilhelm Krall

Hans-Gerhard Stadler

Klaus Koralewsky

Hertha Kraus

Walther W Szubinski

Bededikt Laux

A flow improver comprising a plurality of core-shell particles that can be formed by emulsion polymerization. The core of the core-shell particles can include a drag reducing polymer, while the shell of the particles can include repeat units of a hydrophobic compound and an amphiphilic compound. The flow improver can demonstrate increased pumping stability over conventionally prepared latex flow improvers.

Core-shell flow improver

Process for preparing (meth)acrylates of the formula (I)CH&#x2550;C(R)&#x2014;CO&#x2014;O&#x2014;R&#x2003;&#x2003;(I)in which Ris hydrogen or methyl andRis a saturated or unsaturated, linear or branched, aliphatic or cyclic alkyl radical having 6 to 22 carbon atoms, or a (C-C)-aryl-(C-C)-alkyl radical;by reacting a (meth)acrylate of the formula IICH&#x2550;C(R)&#x2014;CO&#x2014;OR&#x2003;&#x2003;(II)with an alcohol of the formula (III)HO&#x2014;R&#x2003;&#x2003;(III)in the presence of an amount of a suitable catalyst which catalyzes the reaction and of an amount of a phenolic polymerization inhibitor or a combination of two or more phenolic polymerization inhibitors which is sufficient to inhibit undesired polymerization;the reaction being undertaken with input or introduction into the reaction mixture resulting from the reaction of an amount of oxygen or of an oxygenous gas mixture sufficient to inhibit undesired polymerization, and the process is characterized in thatthe specific total oxygen input is less than or equal to 1.0 l/kg, measured in liters of oxygen per kilogram of (meth)acrylate of the formula (I), where the volume of oxygen introduced is calculated at a temperature of 25&#xb0; C. and a pressure of 101 325 pascal. The resulting (meth)acrylates can surprisingly be processed to particularly high molecular weight emulsion polymers which are, for example, outstandingly suitable for use as flow resistance reducers in mineral oil extraction.

Process for preparing (meth)acrylates

The invention relates to a process for preparing methacrylic esters of hydroxyl-functional benzophenones and to their use. Methacrylated benzophenones (benzophenone (meth)acrylates) can be prepared in high purity by the process of the invention, in a simple way and in a high yield.

Method for producing methacrylated benzophenones

Process for preparing (meth)acrylates of the formula (I)CH&#x2550;C(R)&#x2014;CO&#x2014;O&#x2014;R&#x2003;&#x2003;(I) The resulting (meth)acrylates can surprisingly be processed to particularly high molecular weight emulsion polymers which are, for example, outstandingly suitable for use as flow resistance reducers in mineral oil extraction.

The invention relates to a method for producing methacrylated benzophenones and to the uses thereof.

The invention relates to a process for continuously preparing N-alkyl(meth)acrylamides by reacting alkyl(meth)acrylates with high-boiling amines. A catalyst activation and specific workup technique achieve product qualities which have not been achieved to date. In addition, very high space-time yields and overall yields can be achieved.

Method for continuously producing alkylamino(meth)acrylamides

The invention describes a composition comprising, in the form of aqueous dispersion, A) for every 100 parts by weight of a, or of a plurality of, (meth)acrylate polymer(s); B) from 1-400 parts by weight of a, or of a plurality of, (meth)acrylate polymer(s), which contain(s) a compound of the formula (I) copolymerized, where the (meth)acrylate polymer(s) B) differ from the (meth)acrylate polymers specified in A), where these are obtainable by emulsion polymerization of a mixture comprising  Dispersions of this type are UV-curable and have excellent suitability for the production of coatings of any type, in particular for coating of mineral substrates, such as concrete. The dispersions of the invention are also advantageous for blending with known dispersions and improve their properties, in particular in respect of their curing profile.

Composition comprising as the aqueous dispersion preferably (meth)acrylate polymers containing benzophenone in a mixture with (meth)acrylate polymers different therefrom and the use of said composition

The invention describes an emulsion polymer which can be obtained by polymerization of a mixture comprising  where the radicals Rto Rand X have the meanings given in the description; and in that

Emulsion polymer comprising activators, process for preparation thereof and use thereof in two-component or multicomponent systems

The invention relates to mixtures of methacrylamide and aqueous N-methylolmethacrylamide solution.

Aqueous N-methylolmethacrylamide-methacrylamide mixture

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 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

The invention relates to polymers with antimicrobial properties, consisting of: a) 99-40 wt % non functional vinylically polymerizable monomers and b) 1-60 wt % functional vinylically polymerizable monomers of general formula (I) wherein V&equals;vinyl, (meth)acroyl, allyl or styryl, A&equals;a possibly available linking unit, which can be alkyl, aryl, arylalkyl or hydroxy alkyl, which can also be interrupted by hetero atoms, e.g. by hetero atoms in urethane, carbonate, ester, amide or ether groups, wherein y&equals;0 or is 1, Hsp&equals;a hydrophilic spacer of general formula (i) &mdash;(O&mdash;CH,&mdash;CH,),&mdash; and/or (ii) &mdash;(O&mdash;CH,&mdash;CH(CH,)),with r&equals;0-40, s&equals;0-40 and r&plus;s&equals;2-40, also m&equals;1.2 or 3 and R,&equals;CH,, ethyl or benzyl, R,&equals;an alkyl radical with 8-20 C-atoms, wherein t&equals;1, 2 or 3 and X,&equals;Cl,, Br,, I,or alkyl sulphate.

Polymers with anti-microbial properties

Aqueous synthetic resin dispersions comprising latex particles having an average particle diameter below 140 nanometers, consisting of

Multiple phase synthetic resin dispersion

Graft polymerizates on the basis of acrylates and methacrylates, comprise one or more graft monomers of the formula (I) ##STR1## where R.sub.1 stands for a hydrocarbon group having 2-24 carbon atoms and a base polymer of which 55-100 wt. % is synthesized from one or more monomers of the formula (II) ##STR2## wherein R.sub.2 stands for a hydrocarbon group having 2-24 carbon atoms, provided that the groups R.sub.1 and R.sub.2 exhibit Van-der-Waals volumes which differ by less than 30%, and that at least 10 wt. % based on the total monomers of formula (I) are grafted on the base polymer.

Acrylate-methacrylate graft polymerizate

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Mainz, Germany

Wolfgang Klesse