Wacker Chemie Ag

Consortium Fur Elektrochemische Industrie Gmbh

Consortium F&uuml;r Elektrochemische Industrie Gmbh

Consortium Für Elektrochemische Industrie Gmbh & Co. Kg

Klas Sorger

Hermann Petersen

Jürgen Stohrer

Jürgen Bezler

Hans-Peter Weitzel

Juergen Stohrer

Ulf Dietrich

Klaus Bonin

Peter Fritze

J&uuml;rgen Stohrer

Open time and creep resistance of hydraulically settable inorganic construction materials such as mortars and tile adhesives are both improved at the same time by the addition of a polymer mixture in the form of an aqueous dispersion or water-redispersible powder, containing one or more protective colloid-stabilized polymers having units derived from 20% to 30% by weight of vinyl chloride, 50% to 75% by weight of vinyl acetate, 5% to 20% by weight of ethylene, and one or more protective colloid-stabilized, vinyl halide-free polymers of one or more ethylenically unsaturated monomers.

Polymer blends in the form of aqueous dispersions or powders that can be redispersed in water

The invention relates to fiber-containing concrete compositions containing hydraulically setting binders, fillers, one or more fibers, and possibly other additives or admixtures, characterized in that one or more vinylester-ethylene copolymers are contained as additional components.

Fiber-containing concrete compositions

The invention relates to pervious concrete compositions containing hydraulic binder, filler and polymer, characterized in that the polymer present is a vinyl acetate-ethylene-copolymer having a glass transition temperature Tg of &#x2266;20&#xb0; C.

Pervious concrete composition

An enantioselective method for producing optically active 3-alkyl carboxylic acids comprises transforming an optically active secondary alcohol into an optically active, activated compound by introducing a leaving group; reacting the activated compound with a malonic acid derivative to obtain an optically active, alkylated malonic acid compound, the reaction taking place exclusively in ether and/or carboxylic acid ester solvents and one or more aprotic polar solvents or alcohols as a cosolvent in a maximum proportion of 30 volume percent of total solvent, wherein the added cosolvent is not hexamethyl phosphoric acid triamide; the malonic acid compound is hydrolyzed if necessary to obtain the corresponding acid; and the corresponding acid is decarboxylated.

Method for the production of optically active 3-alkylcarboxylic acids and the intermediate products thereof

A process is provided for preparing optically active alcohols, amines and derivatives thereof by reacting aldehydes or imines at a temperature of less than 15&#xb0; C. in the presence of a chiral, enantiomerically pure auxiliary with an organozinc halide which is obtained from zinc and a reactive halogen compound, and water, acid or base, or an alkylating, arylating, acylating or silylating reagent is subsequently added.

Enantioselective reformatsky process for preparing optically active alcohols, amines and derivatives thereof

A process for removing zinc from organic solutions comprising zinc alkoxides or zinc amides, includes admixing the solution with an alkylating, arylating, acylating or silylating agent in the presence of a precipitating reagent having at least two nitrogen donors and subsequently removing the precipitated solid.

Removal of zinc salts from nonaqueous synthesis solutions comprising zinc alkoxides or zinc amides

A process for preparing organozinc halides in solvents, includes reacting a reactive halogen compound with zinc in one or more carboxylic esters. It is also possible to prepare keto, hydroxyl and amino compounds of organozinc halides obtained in a first step from a reactive halogen compound and zinc in one or more carboxylic esters, wherein the organozinc halide obtained is reacted in a second step with an electrophilic reaction partner and the reaction product of the second step is hydrolyzed in a third step.

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Munich, Germany

Klas Sorger