Wacker Chemie Ag

Wacker Polymer Systems Gmbh & Co. Kg

Basf Se Corporation

Wacker-chemie Gmbh

Ulf Dietrich

Hans-Peter Weitzel

Theo Mayer

Timo Melchin

Arno Lange

Peter Ball

Rainer Papp

Harald Zeh

Thomas Bastelberger

Klas Sorger

Andreas Bacher

Peter Fritze

Klaus Seip

Sebastien Garnier

Heimo Wölfle

Armin Hoffmann

Holger Künstle

Werner Bauer

Peter Weiler

Anke Reinschmidt

Holger Kuenstle

Bernd Kayser

Lada Bemert

Stefan Baueregger

Corinna Naundorf

A crosslinkable polymer powder compositions redispersible in water includes one or more vinyl ester polymers, one or more compounds bearing epoxide groups and optionally one or more curing agents which crosslink with the compounds bearing epoxide groups. The vinyl ester polymers do not comprise any epoxide-functional monomer units. The crosslinkable polymer powder compositions redispersible in water includes ≥51% by weight, based on the total weight of the vinyl ester polymers, of one or more compounds bearing epoxide groups.

Crosslinkable polymer-powder compositions redispersible in water

A hydrophobic, water-redispersible polymer powder composition contains

Hydrophobic, water-redispersible polymer powder composition

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 use of redispersible polymer powders containing no organic emulsifier for a binder in the production of carpeting is surprisingly superior to use of the same polymers in the form of an aqueous dispersion. Tuft removal force in particular, is improved. The compositions contain no thickener, or a reduced level of thickener.

Water-redispersible polymer powders for carpet coating compositions

Dispersing agents especially useful as cement plasticizers are copolymers obtained by polymerizing a) 5 to 70 percent by weight of ethylenically unsaturated monocarboxylic acids, carboxylic acid amides, dicarboxylic acids, or their anhydrides and/or (meth)acrylic acid monoesters of dialcohols, b) 1 to 40 percent ethylenically unsaturated, sulfonate-functional or sulfate-functional compounds, c) 10-80 percent of ethylenically unsaturated compounds of polyethylene glycols containing 1 to 300 ethylene oxide units, and terminal OH groups or &#x2014;OR' ether groups, d) 5 to 80 percent of ethylenically unsaturated compounds of polyalkylene glycol containing 1 to 300 Calkylene oxide units and terminal OH groups or &#x2014;OR&#x2032; ether groups, the percentages totaling 100 percent by weight.

Dispersing agents

The present invention relates to the use of isoalkane mixtures for reducing or minimizing the dust emission during the handling of pulverulent construction chemistry products, a process for the preparation of the pulverulent construction chemistry products, and hydraulically setting materials comprising the isoalkane mixtures according to the invention.

Use of isoalkane mixtures for dedusting construction chemistry products

Polyvinyl-alcohol-stabilized redispersible powders which have plasticizing properties are obtained by drying polyvinyl-alcohol-stabilized aqueous dispersions of polymers of one or more monomers from the group of vinyl esters of optionally branched Calkylcarboxylic acids, (meth)acrylic esters of optionally branched Calcohols, dienes, olefins, vinylaromatics and vinylhalides,

Polyvinyl-alcohol-stabilized redispersible powders with plasticizing properties

Dry mortar formulations modified with water-redispersible polymer powders

The invention provides for the use of non-copolymerizable hydroperoxides of the formula R&mdash;O&mdash;O&mdash;H as regulators in the free-radically initiated polymerization of ethylenically unsaturated monomers, where R is H, a C -C -alkyl radical, a C -C -aralkyl radical or a saturated or unsaturated carbocyclic or heterocyclic ring having from 3 to 18 carbon atoms, and may be substituted or unsubstituted.

Use of hydroperoxides as regulators in polymerizations

The invention relates to thickeners based on fully or partially hydrolyzed vinyl alcohol copolymers with a molecular weight Mw greater than 100,000, obtainable by hydrolyzing vinyl acetate copolymers which, besides vinyl acetate units, also contain comonomer units which derive from one or more comonomers selected from the group consisting of 1-(C )-alkylvinyl esters of C carboxylic acids, allyl esters, vinyl esters of alpha-branched C carboxylic acids, and C -alkyl (meth)acrylates, in the form of their aqueous solution or in powder form.

Thickeners based on vinyl alcohol copolymers

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Burghausen, Germany

Ulf Dietrich