Basell Polyolefine Gmbh

Evonik Operations Gmbh

Basf Se Corporation

Evonik Oil Additives Gmbh

Frank-Olaf Mähling

Andreas Deckers

Helmut B Witteler

Ivette Garcia Castro

Dieter Littmann

Dietmar Posselt

Thomas Schimmel

Thomas Pfeiffer

Frank Dietsche

Wilhelm Weber

Kaspar Evertz

Michael Ehle

Thomas Heidenfelder

Brian J Hess

Andreas Daiss

Andrei Gonioukh

Claudius Kormann

Georg Groos

Jan Strittmatter

Klaus Schimossek

Peter Spang

Stefan Maier

Sofia Sirak

Wolfgang Kasel

Rene Koschabek

Thomas Zelinski

Andreas Bauder

Uwe Rebholz

Lars Wittkowski

Katrin Schöller

Michael Neusius

Stefan Hilf

Rhishikesh Gokhale

Gernot Köhler

Ronny Sondjaja

Miriam Kathrin Stihulka

Gabriela Fedor

Andreas Fechtenkötter

Thomas Dröge

Justin August Langston

Irene Trötsch-Schaller

Jennifer Holtzinger

Robert Cybert

Alex J Attlesey

Jane Benito

Fabio Nicolini

Lucas Voigt

Julien Couet

Qi Xiao

Eckhard Häffner

Maria Stimeier

Axel Schmitz

Michael Alibert

Gwen Teh

Michael G Duckworth

Barbara Voltz

Jürgen Gebhardt

Michael Hoppach

Dennis Thong

Stephan B Lopes Ii

Marie A Malitsky

Peter SCHÄFFLER

Matthias Frohberger

Sandra MÜHLING

Siegfried Willert

Stephan Hoffmann

A method for the preparation of homo- and copolymers of alkyl (meth)acrylates having a low residual monomer content involves preparing a reaction mixture containing monomers, charging the reaction mixture, heating the reaction mixture, adding an additional monomer after initial monomer conversion, and optional further processing of the reaction mixture. The homo- and copolymers of alkyl (meth)acrylates obtained by this method as useful in lubricant applications.

Process for preparing homo- and copolymers of alkyl (meth)acrylates with low residual monomer content

Polyalkyl (meth)acrylates are useful in compressor oils. A method of increasing the energy efficiency of a compressor involves operating the compressor with a compressor oil containing a polyalkyl (meth)acrylate-based viscosity index improver.

Compressor oils with high viscosity index

Low molecular weight polyalkyl acrylate polymers can be used as high viscosity base fluids. A corresponding method can be used for their preparation. Lubricant compositions may contain such low molecular weight polyalkyl acrylate polymers and the compositions may be used as automatic transmission fluids, manual transmission fluids, continuously variable transmission fluids, gear oil formulations, industrial gear oil formulations, axle fluid formulations, dual clutch transmission fluids, dedicated hybrid transmission fluids, or hydraulic oils.

High viscosity polyacrylate base fluids

Polyalkyl(meth)acrylate (PAMA) polymers comprising a certain amount of hydroxyl-functionalized alkyl (meth)acrylates can be used for improving the demulsibility performance of high VI lubricating oil compositions. The lubricating oil compositions can be those which are based on apolar base oils, especially hydraulic fluid compositions. The polymers can be comprised in certain lubricating oil compositions.

Functional polyalkyl (meth)acrylates with enhanced demulsibility performance

The present invention describes a composition comprising at least one antioxidant and at least one ethylene vinyl acetate copolymer comprising units being derived from at least one alkyl (meth)acrylate having 1 to 30 carbon atoms in the alkyl residue. The composition is useful as cold flow improver and oxidation stabilizer in fossil fuel oil and or biodiesel fuel oil.

Composition to improve oxidation stability of fuel oils

Copolymers comprising as comonomers in copolymerized form: 

Copolymers, method for producing them and their use for treating surfaces

Process for the continuous preparation of ethylene copolymers by free-radical copolymerization of ethylene and at least one comonomer in a cascade comprising at least two reactors, wherein one or more initiators are fed into the reaction mixture downstream of the first reactor.

Method for producing ethylene copolymers

A process for preparing ethylene homopolymers and copolymers in a tubular reactor having two or more polymerization zones at temperatures of between 150&#xb0; C. and 350&#xb0; C. and pressures in the range from 500 to 5000 bar, using oxygen as initiator, which comprises using, as molar mass regulator, one or more aliphatic ketones of the formula I, where the variable Ris a C-C-alkyl or C-C-cycloalkyl, ethylene homopolymers and copolymers obtainable therefrom and their user for producing injection-molded products in the cosmetics, medical and food sectors are described.

Nonodorous ethylene homopolymers and copolymers having good mechanical properties

In a process for preparing polyethylene in tube reactors with or without autoclaves, where a free-radical initiator is introduced with or without cold ethylene into a flowing ethylene- and comonomer-containing medium, rotation is generated between two streams () to be mixed at an angle () or by provision of a swirl element () in the flow cross section (). In the region of a feed point () for a free-radical initiator, there is provided a cross-sectional constriction () at which the free-radical initiator is introduced through an optimized off-center outlet opening () of an introduction finger () into the rotating flow ().

Device for feeding reactor initiators

A process for preparing ethylene polymers by the high-pressure method comprises dissolving one or more free-radical initiators in one or more ketones of the formula Iwhere Rand Rare identical or different and are selected from among C-C-alkyl and C-C-cycloalkyl and Rand Rmay also be covalently linked to one another to form a 4- to 13-membered ring, prior to the polymerization,compressing the solution, metering it into the polymerization reactor at one or more points and subsequently carrying out the polymerization at from 150 to 380&#xb0; C. and from 500 to 4500 bar.

Preparation of ethylene polymers by the high-pressure method

In a process for polymerizing ethylene and, if desired, further monomers in a high-pressure reactor at from 140 to 320&#xb0; C. and pressures of from 1000 to 4000 bar, but in any case under pressure and temperature conditions under which water displays supercritical behavior, water is introduced continuously or intermittently into the reactor.

Method for high pressure polymerization of ethylene in the presence of supercritical water

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Mannheim, Germany

Frank-Olaf Mähling