Cement Based Tile Adhesive Mortars Additives Redispersible Polymer Powder Vae/RdpMay 26th 2023
The concept of redispersible polymer powder
To meet today’s technical requirements; almost all dry mix mortars require polymer modification. Many gelling mortars contain cellulose ethers as additives to improve water retention and workability. However, after setting and drying, they will be difficult to adhere. In addition, cementitious mortar is a very hard, brittle and inflexible material, and for many applications, flexible and deformable cementitious materials are essential. Therefore, in almost all applications of modern buildings, it is necessary to modify cement mortar with polymers.
The redispersible polymer powder is a free-flowing, white powder obtained by spray drying water vinyl acetate-ethylene copolymer dispersion. Redispersible polymer powders are converted into free-flowing polymer emulsions by spray drying (atomizing an aqueous polymer dispersion in a stream of hot air). When mixed with water, these powders are redispersed into the liquid emulsion, and their properties are basically the same as the original emulsion.