Questions about You Should Know about HPMCMarch 23rd 2023
rdp powder-What is the function of redispersible latex powder?
Redispersible latex powder is mainly used in: internal and external wall putty powder, tile adhesive, tile jointing agent, dry powder interface agent, external wall insulation mortar, self-leveling mortar, repair mortar, decorative mortar, waterproof mortar and external insulation dry In the mortar. In the mortar, it is to improve the brittleness and high elastic modulus of the traditional cement mortar, and give the cement mortar better flexibility and tensile bonding strength to resist and delay the generation of cement mortar cracks. Because the polymer and mortar form an interpenetrating network structure, a continuous polymer film is formed in the pores, which strengthens the adhesion between the aggregates and blocks some of the pores in the mortar. Therefore, the hardened modified mortar has better performance than cement mortar. There is a great improvement.
The role of redispersible latex powder in mortar is mainly as follows:
1. Improve the compressive strength and flexural strength of mortar.
2. Improve the elongation of the mortar, thereby improving the impact toughness of the mortar, and at the same time endow the mortar with good stress dispersion.
3. Reduce the elastic modulus of the mortar, improve the deformability and reduce the cracking phenomenon.
4. Improve the wear resistance of the mortar. The improvement of abrasion resistance is mainly due to the presence of a certain amount of glue on the surface of the mortar. The rubber powder plays a binding role. The net membrane structure formed by the rubber powder can pass through the holes and cracks in the cement mortar. Improve the bonding of the base material and the cement hydration product, thereby improving the wear resistance.