Wacker Chemie Ag

Jessica Seidel

Hans-Peter Weitzel

Abdulmajid Hashemzadeh

Robert Braunsperger

Bernhard Eckl

Muhammad Babar

Gerhard Kögler

Michael Kalchauer

The invention relates to a method for producing polymer powder compositions which are redispersible in water and which are based on polymerisates of one or more ethylenically unsaturated monomers. In a first step, an aqueous polymerisate dispersion is produced by means of a radically initiated polymerization of one or more ethylenically unsaturated monomers in an aqueous medium, said polymerisate dispersion being convened into the polymer powder composition which is redispersible in water by means of a diving process. The invention is characterized in that the polymerization and the drying process are each carried out in a continuous manner, and the polymerization and the diving process are carried out in separate interconnected modules.

Continuous and modular process for producing water-redispersible polymer powder compositions

Water-redispersible polymer powder compositions having cationic functionality are prepared by radically polymerizing one or more ethylenically unsaturated monomers in the presence of a protective colloid and/or emulsifier in an aqueous medium, and drying the resulting aqueous polymer dispersion after addition of a catonic protective colloid as a drying aid, the cationic protective colloid comprising a homopolymer or copolymer of one or more cationic monomers having a quaternary ammonium halide group, with 50 wt % to 100 wt % of the halide ions in the quaternary ammonium halide groups having been replaced by nonhalide anions, and with the fraction of halide ions being less than 1 wt %, based on the total weight of the polymer powder composition.

Process for producing water-redispersible polymer powder compositions having cationic functionality

Polyvinyl alcohol-stabilized polymers in mineral building material compositions, contain one or more polyvinyl alcohols comprising one or more tertiary amine groups or one or more quaternary ammonium groups.

Mineral construction material based on polyvinyl-alcohol-stabilized polymerisates

Growing community of inventors

Zangberg, Germany

Jessica Seidel