As an important auxiliary material in construction applications, redispersible polymer powder plays an important role in tile adhesives, grouting, EIFS, cement mortar, etc. VAE emulsion is also one of the important materials, so what is the difference between redispersible polymer powder and VAE emulsion?
There are significant differences between Redispersible polymer powder and VAE emulsions in terms of composition, morphology, application and performance. The following is a detailed comparison:
1. Composition
Redispersible polymer powder: It is made by spray drying of emulsion, and the main ingredients include polymer resin (e.g., VAE), additives (e.g., protective colloid, anti-caking agent) and so on.
VAE emulsion: It is the dispersion of ethylene-vinyl acetate copolymer in water, the main components are VAE resin and water.
2.Properties
VAE Emulsion Powder: VAE emulsion powder has film-forming property, its 50% aqueous solution forms an emulsion, and can form a plastic-like film after being placed for 24 hours, with good flexibility and water resistance.
Redispersible polymer powder: re-dispersible latex powder is a white powder of vinyl acetate-ethylene copolymer formed by spray drying of EVA emulsion, which has good re-dispersibility, and can be re-dispersed into an emulsion by adding water, and its chemical properties are exactly the same as the initial emulsion.
3. Morphology
Redispersible polymer powder: in powder form, easy to transport and store, need to add water to disperse when using.
VAE emulsion: in liquid state, used directly without re-dispersion.
4. Application
Redispersible polymer powder: used in dry mortar, ceramic tile adhesive, exterior wall insulation system, etc., to enhance adhesion and flexibility.
VAE emulsion: used in coatings, adhesives, building sealants, etc., providing good adhesion and film-forming properties.
5. Performance
Redispersible polymer powder: it can restore the performance of emulsion after adding water to improve the bonding strength, flexibility and crack resistance of mortar.
VAE emulsion: excellent bonding, water resistance and flexibility, good film-forming property, suitable for a variety of substrates.
6. Storage and transportation
Redispersible polymer powder: long storage period, convenient transportation, not easily affected by the environment.
VAE emulsion: need to prevent freezing and high temperature, storage and transportation conditions are more strict.
7. Environmental protection
Redispersible polymer powder: low VOC, good environmental performance.
VAE emulsion: also low VOC, good environmental performance.
Summarize
Redispersible polymer powder: powder, easy to transport and store, suitable for dry mortar, etc.
VAE emulsion: liquid, direct use, suitable for coatings and adhesives, etc.
Both have their own advantages, the choice depends on the specific application needs.
