Wacker-chemie Gmbh

Wacker Chemie Ag

Wacker Polymer Systems Gmbh & Co. Kg

Thomas Bastelberger

Theo Mayer

Reinhard Härzschel

Hermann Lutz

Reinhard Haerzschel

Franz Jodlbauer

Hans-Peter Weitzel

Abdulmajid Hashemzadeh

Peter Ball

Xi Zhang

Rudolf Weissgerber

Ulf Dietrich

Jürgen Bezler

Stefan Ingrisch

Arndt Schlosser

Armin Hoffmann

Peter Heiling

Peter Weitzel

Jakob Mühlthaler

Stephan Karpfhammer

The invention relates to coated support means for fracking mining methods, containing an inorganic substrate material and a coating containing polymers of one or more ethylenically unsaturated monomers from the group containing vinyl esters of unbranched or branched alkyl carboxylic acids with 1 to 15 C atoms, methacrylic acid esters and acrylic acid esters of alcohols with 1 to 15 C atoms, vinyl aromatics, olefins, dienes and vinyl halides, characterised in that the polymers are obtained by means of radical-initiated polymerisation in an aqueous medium, wherein 0.5 to 20 wt. % of ethylenically unsaturated and silane group-containing monomers are copolymerised, in relation to the total weight of the monomers.

Coated proppants for fracking extraction methods

The use of an adhesion-promoting additive combination composed of one or more polyalkylenoxides out of the group comprising polypropylene oxides and ethylene oxide-propylene oxide copolymers, and of one or more starch ether derivatives out of the group comprising carboxyalkyl starch ethers and their alkali salts, and hydroxyalkyl starch ethers, in mortar compositions comprising mineral binders and water-redispersible polymer powders.

Use of polypropylene oxide or ethylene oxide-propylene oxide copolymers in combination with starch ether derivatives as additive in dry mortar compositions

The invention relates to fiber-containing pasty construction materials, containing a) one or more fillers, b) optionally additives, characterized in that they contain c) fibers, d) one or more polymers based on one or more ethylenically unsaturated monomers, having a glass transition temperature Tg of &#x2267;&#x2212;15&#xb0; C., e) &#x2266;5% by weight hydraulically setting binders and f) water, wherein the information in % by weight relates to the dry weight of the fiber-containing pasty construction materials. The invention also relates to a process for producing a reinforcing composition free of woven reinforcing fabrics.

Fiber-containing pasty construction materials

Hydrophobicizing agents which are easily admixed with construction chemical products are prepared by providing a solution of a protective colloid and adding thereto a fatty acid compound sensitive to high pH environments, optionally, a hydrophobicizing organosilicon compound, and drying the resulting aqueous mixture.

Hydrophobing additive

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

Hydrophobically modified polymer compositions contain at least one polymer based on one or more ethylenically unsaturated monomers, in the form of an aqueous polymer dispersions or water-redispersible polymer powder prepared therefrom, further containing, a) one or more silanes, polysilanes, oligosiloxanes, polysiloxanes, carbosilanes, polycarbosilanes, carbosiloxanes, polycarbosiloxanes, polysilylenedisiloxanes, and b) one or more fatty compounds from the group of the fatty acids having from 8 to 22 carbon atoms, their metal soaps, their amides, and their esters with monohydric alcohols having from 1 to 8 carbon atoms, with glycol, with polyglycol, with polyalkylene glycol, with glycerol, with mono-, di-, or triethanolamine, or with monosaccharides.

Hydrophobically modified polymers

The invention relates to a paper composite material with repulp-resistant adhesive coating, consisting of a paper carrier and an adhesive layer, characterized in that an intermediate coat of a dispersion polymer film containing a protective colloid and/or an emulsifying agent and with a glass transition temperature Tg of &#x2212;20&#xb0; to 40&#xb0; is applied between the paper carrier and the adhesive coating. The invention also relates to a method for the production of paper composite material with repulp-resistant adhesive coating.

Composite paper material with a pressure-sensitive adhesive coating finished to be resistant to repulping

A method is provided for producing protective colloid-stabilized vinyl aromatic-1.3-diene-copolymers in the form of their aqueous polymer dispersions or in the form of a powder which can be re-dispersed in water, by emulsion-polymerizing a mixture containing at least one vinyl aromatic and at least one 1,3-diene in the presence of a protective colloid and optionally, drying the resulting polymer dispersions. In the method part of the protective colloid is provided straightaway and part is metered.

Process for preparing protective-colloid-stabilized vinylaromatic-1,3-diene copolymers

A method for producing protective-colloid-stabilized polymers in the form of their aqueous polymer dispersions or in the form of powders which can be re-dispersed in water, wherein one or several monomers from the group made up of vinyl aromatics, 1.3 dienes, acrylic acid esters and methacrylic acid esters of alcohols with 1 to 15 C-atoms are polymerized in the presence of a combination of protective colloids consisting of one or several protective colloids from the group of hydrophobically modified, partly saponified polyvinyl esters which produce a surface tension of &lE;40 mN/m as a 2% aqueous solution, and one or several protective colloids which produce a surface tension of >40 mN/m as a 2% aqueous solution.

Method for producing polymers stabilized with protective colloids

Storage-stable, silane-modified core-shell copolymers are provided comprising a shell-forming copolymer I of

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Emmerting, Germany

Thomas Bastelberger