Redispersible polymer powder is a free-flowing polymer white powder that can be easily re-emulsified and dispersed in water to form a stable emulsion. It can be mixed with other powdered materials such as cement, sand, lightweight aggregate, etc. in the production factory according to a certain ratio in a dry state to obtain a high-quality and easy-to-use cement dry-mixed mortar, which can reduce on-site construction. Error and inconvenience when mixing and measuring with emulsion.
Six functions of redispersible polymer powder:
1. Improve adhesive strength and cohesion
In cement dry mortar products, it is extremely necessary to add dispersible polymer powder. It is very obvious to improve the bonding strength and cohesion of the material. This is due to the penetration of the polymer particles into the pores and capillaries of the cement matrix, and the formation of good cohesive strength with the cement after hydration. Due to the excellent adhesion of polymer resin itself, it can improve the adhesion of cement mortar products to substrates, especially the inorganic binders such as cement are bonded to organic substrates such as wood, fiber, PVC and EPS. The improvement of poor performance has a more obvious effect.
2. Improve bending and tensile resistance
In the rigid skeleton formed by the hydration of cement mortar, the polymer film is elastic and tough. Between the cement mortar particles, it functions like a movable joint, which can withstand high deformation loads and reduce the stress, making the Tensile and bending resistance are improved.
3. Improve impact resistance
Redispersible polymer powder, thermoplastic resin. It is a soft film coated on the surface of the mortar particles, which can absorb the impact of external force and relax without breaking, thereby improving the impact resistance of the mortar.
4, improve the hydrophobicity and reduce the water absorption rate
Adding dispersible polymer powder can improve the microstructure of cement mortar. Its polymer forms an irreversible network in the process of cement hydration, closes the capillary in the cement gel, blocks the absorption of water, prevents the penetration of water, thereby improving the impermeability.
5. Improve wear resistance and durability
The addition of dispersible polymer powder can increase the dense bond between the cement mortar particles and the polymer film. The enhancement of the cohesive force correspondingly improves the ability of the mortar to withstand shear stress, so that the wear rate is reduced, the wear resistance is improved, and the service life of the mortar is prolonged.
6. Improve freeze-thaw stability and effectively prevent material cracking
Redispersible polymer powder, the plasticity of its thermoplastic resin, can overcome the damage of thermal expansion and contraction caused by temperature difference changes on cement mortar materials. Overcoming the shortcomings of simple cement mortar with large drying shrinkage deformation and easy cracking, it can make the material flexible, thereby improving the long-term stability of the material.