Basf Aktiengesellschaft

Basf Se Corporation

Markus Klumpe

Matthias Zipplies

Thomas Ostrowski

Ulrich Annen

Christian Bittner

Georg Heinrich Grosch

Joachim Pakusch

Juergen Gert Tropsch

Stefan Becker

Christian E Spindler

Kai-Uwe Baldenius

Hans-Peter Seelmann-Eggebert

Roland Reichenbach-Klinke

Björn Langlotz

Susanne Stutz

Arnulf Lauterbach

Ralf Noerenberg

Christian Knoll

Benjamin Wenzke

Rolf Gulden

Claus Hackmann

Thomas Goetz

Nicole Meier

Rolf-Dieter Kahl

Roland Boehn

Christian Spindler

The present invention relates to a process for the preparation of monohydroxypolyalkylene oxides (MPAO) which are substantially free of diols, comprising the reaction of at least one monoalcohol as a starter with at least one alkylene oxide in the presence of at least one basic catalyst, the catalyst being used as a solution in water or alcohol or in solvent mixtures which comprise water and/or alcohol.

Method for producing monohydroxypolyalkylene oxides

The present invention relates to a process for preparing hydrophobically associating macromonomers M and to the novel macromonomers prepared by means of the process according to the invention. The macromonomers M comprise a copolymerizable, ethylenically unsaturated group and a polyether structure in block form, the latter consisting of a polyethyleneoxy block and a hydrophobic polyalkyleneoxy block consisting of alkyleneoxy units having at least 4 carbon atoms. Optionally, the macromonomers M may have a terminal polyethyleneoxy block. The macromonomers prepared by the process according to the invention are suitable for reaction with further monomers, especially with acrylamide, to give a water-soluble, hydrophobically associating copolymer.

Process for preparing a macromonomer

A process for preparing polyether alcohols by reacting one or more unsaturated starters having at least one active hydrogen atom per molecule with one or more alkylene oxides in the liquid phase in the presence of a basic catalyst in a reactor, wherein the one or more alkylene oxides are introduced into the reactor in such a way that the concentration of unreacted alkylene oxide in the liquid reaction mixture in the reactor is increased as far as possible with increasing degree of addition of the alkylene oxide onto the starter, with the proviso that the temperature at the end of a runaway reaction is at any point in time at least 100 K below the onset temperature of the decomposition reaction of the liquid reaction mixture, is proposed.

Process for preparing allyl alcohol alkoxylates

The alkoxylate mixtures comprise alkoxylates of the formula (I)CHCH(CH)CHO(B)(A)(B)(A)H&#x2003;&#x2003;(I)

C10 alkanolalkoxylate mixtures and use thereof as novel low-foaming wetting agents

A process for the preparation of polyether alcohols by reacting at least one alkylene oxide with at least one unsaturated starter having at least one active hydrogen atom per molecule under basic catalysis,

Process for the preparation of polyether alcohols from unsaturated starters having active hydrogen atoms

The present invention relates to novel comb polymers which bear poly-C-C-alkylene ether side chains A and functional groups B which at a pH of &#x3e;12 are present in the form of anionic groups on a carbon backbone and also the salts of such comb polymers. The invention also relates to the use of these comb polymers as additives in preparations comprising a mineral binder. The polyalkylene ether side chains A have the following formula:*&#x2014;U&#x2014;(C(O))&#x2014;X-(Alk-O)&#x2014;Y&#x2014;Z&#x2003;&#x2003;A.

Comb polymers and their use as additives for preparations of mineral binders

A process is described for purifying polyalkylene glycols obtained by adding alkylene oxide to alkylene glycol, in which, after addition is complete, the resultant polyalkylene glycol is treated at a pH of &#x3e;7 with a bleaching agent selected from the group consisting of peroxides, peracids, percarbonates, perborates, peroxodisulfates or oxygen, in each case with or without addition of a bleaching activator. The process is suitable in particular for preparing polyethylene glycol having molar weights from 196 to 203 g/mol which meets requirements of pharmacopeias.

High-purity polyalkylene glycols and preparation thereof

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Mannheim, Germany

Markus Klumpe