Basf Aktiengesellschaft

Basf Se Corporation

Robert Rupaner

Gerhard Bauer

Sven Lawrenz

Rainer Hummerich

Johannes Dobbelaar

Eckehardt Wistuba

Karl-Heinz Schumacher

Bernd Reck

Wilhelm Friedrich Beckerle

Axel Kistenmacher

Franz-Josef Mueseler

Maximilian Angel

Hermann Seyffer

Rudolf Schuhmacher

Karl-Heinz Wassmer

Lambertus Manders

Martin Meister

Gerald Wildburg

Ilshat Gubaydullin

Bradley Ronald Morrison

Guillermo Arens

Oliver Birkert

Wolfgang Huemmer

Reinhold J Leyrer

Ivette Garcia Castro

Ekkehard Jahns

Jochen Kessler

J&uuml;rgen Nahstoll

Gerd Rehmer

Peter Schuhmacher

Wolfgang Grabarse

Rolf Dersch

Klaus Boehlke

Josef Neutzner

Sebastian Roller

Peter Keller

Roland Baumstark

Michael W Mueller

Bernhard Schlarb

Christian Magin

Werner Kirchner

Jan Strittmatter

Martin Scholtissek

Rene Koschabek

Reinhard B&auml;cher

Wolfgang Hubinger

Manfred Weber

Wolfgang H&uuml;binger

Claudia Heibel

Roland F Offner

Audrey Cosyns

J&uuml;rgen Hartmann

Gerhard Schumacher

Axel Ferber

Christian-Ulrich Schmidt

Jurgen Nahstoll

Rainer Wunder

Erhard Gunther

Christian Lach

The present invention relates to a middle-pressure polymerization process for the preparation of a liquid ethylene copolymer which comprises in polymerized form 20 to 60 wt % of ethylene; and at least 20 wt % of an acrylate, which is selected from C-Calkyl (meth)acrylate, where a monomer mix comprising the ethylene and the acrylate is polymerized at a pressure of 50 to 400 bar and in the presence of at least 2 wt % of a chain transfer agent. The invention further relates to a liquid ethylene copolymer obtainable by the polymerization process; and to a lubricant comprising the liquid ethylene copolymer obtainable by the polymerization process; and to a method for reducing friction between moving surfaces comprising the step of contacting the surfaces with the lubricant or with the ethylene copolymer.

Middle-pressure polymerization process for liquid ethylene copolymers

Provided is a method for performing a polymerization process in a stirred reactor, wherein a critical time window is determined by means of a monitor of at least one polymerization process parameter and an associated process window, and when a critical time window is present, an adaptation of process conditions is made in order to configure the polymerization process to conform to the process window.

Method for producing a polymer

The present invention relates to a method for performing a polymerization process in a stirred reactor, wherein a critical time window is determined by means of a monitor of at least one polymerization process parameter and an associated process window, and when a critical time window is present, an adaptation of process conditions is made in order to configure the polymerization process to conform to the process window.

Formaldehyde-free binders for shaped articles

A process is described for reducing the residual monomer content in a liquid solution, mixture, melt, suspension or dispersion of a polymer by postpolymerization with addition of a redox initiator system at a reaction temperature appropriate to it and with an extremely short mixing time of the liquid system in the production reactor by metering&mdash;gradually, in portions or continuously&mdash;at least one of the redox initiator components required to initiate polymerization of the residual monomers over a period (metering time) which is from about 10 to 250 times the mixing time of the liquid system in said reactor.

Method for reducing residual monomers in liquid systems by adding an oxidation-reduction initiator system

Preparation of recyclable fiber composites

A process is described for effectively reducing the residual monomer content of an aqueous polymer dispersion by aftertreatment at atmospheric pressure or above with an initiator system comprising a) a hydroperoxide, hydrogen peroxide or a peracid, and b) an &agr;-hydroxy carboxylic acid, such as tartaric acid, or with a salt thereof.

Method of reducing the content of residual monomers in aqueous polymer dispersions

A reactor for chemical reactions, especially polymerization reactions, and in particular a reactor for emulsion, suspension, solution, bulk and/or precipitation polymerizations, which has a stirring mechanism, incoming and outgoing lines and a removable lid, and where both the stirring mechanism and incoming and outgoing lines are installed on the reactor floor. The novel reactor is quick and easy to open and clean and permits simple and rapid changeover of the installed stirring elements.

Chemical reactor with stirrer and incoming and outgoing lines on the reactor floor

Organic compounds containing &mdash;CH &mdash;CHR&mdash;O&mdash; and/or &mdash;CH &mdash;CH(OH)&mdash; groupings (R&equals;H, C -C -alkyl) produce, under the action of free radicals, small amounts of C -C -aldehydes, the content of which can be reduced to <1 ppm according to the novel process by adding compounds which can react with the aldehyde groups. The materials containing said groupings include many emulsifiers and protective colloids used in polymer chemistry, such as polyethylene glycols, polyvinyl alcohols or ethoxylation products of long-chain alcohols, phenols or amines. The process is of particular importance for the treatment of polymer dispersions which have been prepared by free-radical polymerization of monomers in the presence of such emulsifiers or protective colloids, and permits the preparation of aldehyde-free polymer dispersions and their use for sanitary and hygiene articles.

Method for reducing the C1-C2-aldehyde content formed from compounds with -CH2-CHR-O-or-CH(OH)-groups

Disclosed are core-shell particles, whose core and shell materials are capable of forming a two-phase system, the shell material being filmable, the core being essentially form-stable under shell-filming conditions and being only very minimally swellable by the shell material, if at all, the cores having a monodisperse size distribution, and there being a difference between the refractive indices of the core material and of the shell material of at least 0.001. Also disclosed are the preparation of the core-shell particles and their use for preparing effect colorants.

Core-shell particles and preparation and use thereof

At least one single-stage or multistage stirrer which produces not only a tangential flow component but also an axial flow field is used in a stirred-vessel reactor in connection with the preparation of polymers by liquid phase polymerization.

Use of a single-stage or multistage stirrer to prepare polymers

Formaldehyde-free coating composition for shaped articles

Formaldehyde-free binder for mouldings

A process for deodorizing and subsequently cooling dispersions or liquids comprising

Process for cooling dispersions and liquids

Process for preparing an aqueous polymer dispersion

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Ellerstadt, Germany

Robert Rupaner