Basic functions:
RDP Powder is a white or off-white water-soluble liquid powder produced by spray-drying special water-based emulsion.
RDP powder forms a film after dispersion and acts as a second adhesive. The protective colloid is absorbed by the mortar system (it will not be destroyed by water after the film is formed, or “secondary dispersion”). The film-forming polymer resin as a reinforcing material, it is distributed in the entire mortar system, thereby increasing the cohesion, the compressive strength and flexural strength of the mortar.
The addition of RDP powder to the elongation of the mortar improves the impact toughness of the mortar, and also gives the mortar a good stress dispersion effect. The bonding mechanism relies on the adsorption and diffusion of macro molecules on the sticky surface.
At the same time, the RDP 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 surface of the new plaster are close to the surface performance, thus adsorbing Its performance greatly increases. Reduce the elastic modulus and deform-ability of the mortar, and reduce cracking.
The abrasion resistance of the mortar:
The abrasion resistance is mainly due to the presence of a certain amount of glue on the surface of the mortar. The rubber powder acts as a bonding agent. The mesh 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 abrasion resistance. Give mortar excellent alkali resistance.
The role of RDP powder in putty, mortar and tile glue:
Internal and external wall putty powder, tile adhesive, tile jointing agent, dry powder interface agent, external wall external thermal insulation mortar, self-leveling mortar, repair mortar, decorative mortar, waterproof mortar and external thermal insulation dry-mixed 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 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 RDP powder in putty is mainly in the following aspects:
1. Adhesion and mechanical properties of putty. RDP is a powder binder made from a special emulsion (high molecular polymer) spray-dried. This powder can be quickly re-dispersed into an emulsion after being in contact with water, and has the same properties as the initial emulsion, that is, a film can be formed after the water evaporates. This film has high flexibility, high weather resistance and resistance to various High adhesion to the substrate. In addition, the water-repellent latex powder can make the mortar have good water resistance.
2. The cohesion of putty, excellent resistance, alkali resistance, abrasion resistance, and enhanced flexural strength.
3. Waterproof and permeability of putty.
4. Water retention of putty, increase open time, and workability.
5. Impact resistance of putty and enhanced durability of putty.
The role of RDP powder in mortar is mainly in the following aspects:
1. Compressive strength and flexural strength of mortar.
2. The addition of the latex powder to the elongation of the mortar improves the impact toughness of the mortar and also gives the mortar a good stress dispersion effect.
3. The bonding performance of the mortar is improved. The bonding mechanism relies on the adsorption and diffusion of macro molecules 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 surface of the new plaster are close to the surface performance, thus adsorbing Its performance greatly increases.
4. Reduce the elastic modulus and deform-ability of mortar and reduce cracking.
5. Wear resistance of mortar. The abrasion resistance is mainly due to the presence of a certain amount of glue on the surface of the mortar. The rubber powder acts as a bonding agent. The mesh 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 abrasion resistance.
6. Give the mortar excellent alkali resistance.
Post time: Jul-29-2021