Properties and Applications of Redispersible Polymer Powder

Apr. 22, 2024

Redispersible Polymer Powder, is a water soluble polymer made from ethylene-vinyl acetate polymer through spray drying, it's designed for the construction industry to enhance the properties of dry mix mortar.

Properties of Redispersible Polymer Powder

A: Improve the bending strength and flexural strength of mortars

The polymer film formed by Redispersible Polymer Powder has good flexibility. Films are formed in the gaps and surfaces of cement mortar particles to form flexible connections. Heavy and brittle cement mortar becomes elastic. Mortar added with Redispersible Polymer Powder is several times higher in tensile and flexural resistance than ordinary mortar.

B: Improve the bonding strength and cohesion of mortars

After the Redispersible Polymer Powder as an organic binder is formed into a film, it can form high tensile strength and bonding strength on different substrates. It plays an important role in the adhesion of mortar to organic materials (EPS, extruded foam board) and smooth surface substrates. The film-forming polymer rubber powder is distributed throughout the mortar system as a reinforcing material to increase the cohesion of the mortar.

C: Improve the impact resistance, durability and wear resistance of mortars

The rubber powder particles fill the cavity of the mortar, the density of the mortar is increased, and the wear resistance is improved. Under the action of external force, it will produce relaxation without being destroyed. The polymer film can exist in the mortar system for a long time.

D: Improve the weather resistance, freeze-thaw resistance and anti-cracking of mortars

Redispersible Polymer Powder is a thermoplastic resin with good flexibility, which can make the mortar cope with the change of external cold and hot environment, and effectively avoid the cracking of the mortar due to the change of temperature difference.

E: Improve the hydrophobicity of mortar and reduce water absorption

The Redispersible Polymer Powder forms a film on the cavity and surface of the mortar, and the polymer film will not disperse again after being exposed to water, which prevents the intrusion of water and improves the impermeability. Special Redispersible Polymer Powder with hydrophobic effect.

F: Improve the workability of mortars

There is a lubricating effect between the polymer rubber powder particles, so that the mortar components can flow independently. At the same time, the rubber powder has an inductive effect on the air, giving the mortar compressibility and improving the construction workability of the mortar.

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Applications of Redispersible Polymer Powder

1. Exterior wall insulation system:

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Adhesive mortar: ensure that the mortar firmly bonds the wall with the EPS board. Improve bond strength; Plastering mortar: ensure the mechanical strength of the insulation system, crack resistance and durability, and impact resistance.

2. Cement-based tile adhesive:

Provides a high-strength bond to the mortar, giving the mortar enough flexibility to accommodate the different coefficients of thermal expansion of the substrate and the tile.

3. Putty for interior and exterior walls:

Improve the bonding strength of the putty and ensure that the putty has good flexibility to buffer the effect of different stretching stresses produced by different base layers. Ensure that the putty has good aging resistance, impermeability and moisture resistance.

4. Self-leveling mortar:

Ensure the matching of elastic modulus, bending resistance and crack resistance of mortar.

Improve the wear resistance, bonding strength and cohesion of mortar.

5. Interface mortar:

Improve the surface strength of the substrate and ensure the adhesion of the mortar.

6. Cement-based waterproof mortar:

Ensure the waterproof performance of the mortar coating, and at the same time have good adhesion to the base surface, and improve the compressive and flexural strength of the mortar.

7. Repair mortar:

Ensure that the expansion coefficient of the mortar matches the base material and reduce the elastic modulus of the mortar. Make sure the mortar has good water repellency, air permeability and cohesion.