REDISPERSIBLE POWDERS

REDISPERSIBLE POLYMER POWDERS
DESCRIPTION
Redispersible polymer powder

CAS No .: 24937-78-8 
Synonyms : RPP, polymer powder, polymer additive, RDP

Redispersible polymer powder (RPP) is a polymer capable, when mixed with water, to redisperse, again form aqueous polymer dispersions, which, as a result of curing, form a continuous polymer film, contributing to high water-holding capacity, adhesion and workability of dry building mixtures. 

Production method

The redispersible powder is obtained by spray drying a latex emulsion. To prevent the latex particles from sticking together during production and when diluted with water, polyvinyl alcohol is used. RPP (dry latexes) are usually produced on the basis of: polyvinyl acetate, copolymers of vinyl acetate with ethylene, copolymers of vinyl acetate with vinyl versatate, as well as acrylic polymers.

Properties

After mixing the dry mixture with water, the powder goes into dispersion and after drying forms a film. The film increases adhesion and elasticity, however, the more adhesion, the less elasticity and vice versa. Accordingly, powders are divided into hard with high adhesion, highly elastic with low adhesion and medium elastic with normal adhesion. In some powders, water repellents are added, imparting hydrophobic properties to the system.

Application area

Redispersible polymer powders are used in the manufacture of products such as:

- Tile adhesives; 

- Plasters; 

- Putties;

- Repair compositions; 

- Waterproofing; 

- Self-leveling floors, etc.