Redispersible Polymer Powder
Redispersible polymer powders (RDP) are polymer emulsions which have been converted to powdered thermoplastic resin materials. This process is achieved through high temperatures and pressures, spray drying and surface treatment.
The RDP is dissolved in water, dispering the powder back into an emulsion that has almost the same characteristics of the original copolymer emulsion.
Mixing redispersible polymer powders into mortar formulations increases the flexibility and cohesiveness of the mortar itself. It also contributes to better water retention properties of mortar.
The most widely used RDPs are based on Vinyl Acetate and Ethlyene backbones.