Classification of Redispersible Polymer powder and several problems that need to be paid attention to when using it

[Roy]

When choosing Redispersible Polymer powder(RDP), several parameters and corresponding functions need to be paid attention to:

1. Glass transition temperature: the lower the temperature, the better the flexibility and the lower the bonding force, and vice versa

2. Viscosity: Among the dry-mixed mortar products in the current formula I have made, except for the viscosity requirements of self-leveling cement, other things do not matter. If it is in the self-leveling system, it is best to choose low-viscosity RDP

3. Anti-caking agent: The addition of an anti-caking agent will have a significant impact on the cohesive force, which should be concluded through the coherent force test

4. Chemical composition, the classification of several standard RDP is as follows:
EVA ethylene-vinyl acetate copolymer is prepared by copolymerization of ethylene (E) and vinyl acetate (VA). The English name is: Ethylene Vinyl Acetate referred to as EVA or E/ VAC.
E/VC/VL terpolymer of ethylene, vinyl chloride, and vinyl laurate
VAC/E/VeoVa Vinyl Acetate, Ethylene and Higher Fatty Acid Vinyl Ester Terpolymer Powder
VAC/VeoVa Vinyl Acetate and Vinyl ester of versaticacids Copolymer Powder
A/S Acrylate and Styrene Copolymer Powder
VAC/A/VeoVa Vinyl Acetate, Acrylic Ester, and Higher Fatty Acid Vinyl Ester Terpolymer Powder
PVC vinyl acetate homopolymer powder
SBR Styrene and Butadiene Copolymer Powder

 

[Cassie]

There is also a "minimum film forming temperature" to consider.

 

[Luis]

If it is Redispersible Polymer powder, it can be ignored in personal feelings when used in mortar. The cement will generate heat of hydration when it is hydrated.