| Redispersible latex powder products are water-soluble redispersible powders, which are divided into ethylene/vinyl acetate copolymer, vinyl acetate/vinyl tertiary carbonate copolymer, acrylic acid copolymer, etc., powder bonded after spray drying It uses polyvinyl alcohol as a protective colloid. This kind of powder can be quickly redispersed into emulsion after contact with water. Because redispersible latex powder has high bonding ability and unique properties, such as: water resistance, construction and heat insulation, etc., their The scope of application is extremely wide. Advantages of redispersible latex powder: It does not need to be stored and transported together with water, reducing transport costs; Long storage period, anti-freezing, easy to keep; The packaging is small in size, light in weight and easy to use; It can be mixed with hydraulic binder to form a synthetic resin-modified premix. It only needs to add water when using it. This not only avoids errors in mixing on the site, but also improves the safety of product handling. Uses 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 bond between the aggregates and blocks part 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: 1. Improve the compressive strength and flexural strength of mortar. 2. The addition of latex powder increases the elongation of the mortar, thereby improving the impact toughness of the mortar, and also gives the mortar a good stress dispersion effect. 3. Improve the bonding performance of the mortar. The bonding mechanism relies on the adsorption and diffusion of macromolecules on the sticky surface. At the same time, the rubber powder has a certain degree of permeability. Together with the cellulose ether, it fully infiltrates the surface of the base material, so that the base layer and the new plaster have similar surface properties, thereby improving Adsorbability greatly increases its performance. 4. Reduce the elastic modulus of the mortar, improve the deformability, and reduce the cracking phenomenon. 5. 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 bonding 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. 6. Give the mortar excellent alkali resistance |
