Wacker Polymer Systems Gmbh & Co. Kg

Wacker Chemie Ag

Wacker-chemie Gmbh

Andreas Bacher

Theo Mayer

Kurt Stark

Hans-Peter Weitzel

Harald Zeh

Ulf Dietrich

Franz Jodlbauer

Thomas Kornek

Werner Bauer

Karl Ernst Fickert

Karl-Ernst Fickert

Bernd Kayser

A water redispersible polymer powder with superior hydrophobicizing properties is a copolymer of vinyl acetate, a vinyl ester of an &#x3b1;-branched monocarboxylic acid, an alkyl(meth)acrylate, and a vinyl ester of a long chain unbranched monocarboxylic acid. The polymer is particularly useful as a hydrophobicizing agent for mineral-based chemical building products such as renders, mortars, etc.

Hydrophobicizing water-redispersible polymer powder

Compositions useful for preparing coating slips for inkjet recording materials include a pulverulent silane-modified fully or partially hydrolyzed polyvinylalcohol and a redispersible polymer powder.

Compound of a powdery coating agent

The invention relates to polyvinyl alcohols and polyvinyl acetals which contain silane and can be obtained by means of a) radical polymerization of at least one vinyl ester of unbranched or branched alkyl carboxylic acids comprising between 1 and 18 C atoms, in the presence of aldehydes containing silane or the hemiacetals or full acetals thereof, b) saponification of the vinyl ester polymers obtained thereby, and optionally c) acetalation of the partially saponified or fully saponified vinyl ester polymers.

Polyvinyl alcohols and polyvinyl acetals containing silane

Silane-containing polymers are prepared by the polymerization of one or more ethylenically unsaturated monomers in the presence of a silane-containing aldehyde, hemiacetal, or acetal as a regulator, optionally with further regulators as well. The silane-containing regulators produce polymers with superior properties and with improved polymerization parameters as compared to the conventional mercaptosilane regulators.

Polymers containing silane

Silane-modified polyvinyl alcohol mixtures comprising:

Silane-modified polyvinyl alcohol mixtures

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.

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Burghausen, Germany

Andreas Bacher