Questions about You Should Know about HPMCMarch 23rd 2023
Redispersible latex powder plays multiple roles in our lives. It can be used as a coagulant in mortar or as a polymer mortar in cement. It is versatile. Below we have summarized the six characteristics of redispersible latex powder in our lives, and hope that it can be helpful to everyone:
1. Improve bonding strength and cohesion
In dry cement mortar products, it is necessary to add redispersible latex powder. It is very obvious to improve the bonding strength and cohesion of materials. This is due to the penetration of polymer particles into the pores and capillaries of the cement matrix and the formation of good cohesive strength after hydration with the cement. Moreover, because of the excellent adhesion of polymer resins, it is improving the adhesion of cement mortar products to substrates, especially cement, which is an inorganic binder, to wood, fiber, PVC, EPS and other organic substrates. The improvement of poor sex is more obvious.
2. Improve bending and tensile resistance:
In the rigid framework formed by the hydration of cement mortar, the polymer film is elastic and tough. It acts like a movable joint between cement mortar particles and particles. It can withstand high deformation loads and reduce stress. The tensile strength and bending resistance are improved.
3. Improve impact resistance:
Redispersible latex powder is a thermoplastic resin. It is coated with a soft film on the surface of the mortar particles, which can absorb the impact of external forces, relax without being damaged, thereby improving the impact resistance of the mortar.
4. Improve hydrophobicity and reduce water absorption:
Adding redispersible latex powder can improve the microstructure of cement mortar. The polymer forms an irreversible network during the cement hydration process, seals the capillaries in the cement gel, blocks the penetration of water, and improves the impermeability.
5. Improve the durability of wear resistance:
Adding redispersible latex powder can increase the tight bonding between cement mortar particles and polymer film. The enhancement of the cohesive force correspondingly improves the ability of the mortar to withstand shear stress, which reduces the wear rate, improves the wear resistance, and prolongs the service life of the mortar.
6. Improve freeze-thaw stability and effectively prevent material cracking:
Redispersible latex powder, the plastic effect of its thermoplastic resin, can overcome the thermal expansion and contraction of the cement mortar material caused by the temperature difference. Overcome the characteristics of simple cement mortar, such as large shrinkage deformation and easy cracking, to make the material flexible, thereby improving the long-term stability of the material.