Re-dispersible Polymer Powder is a powder dispersion produced and processed from modified polymer emulsions. It has good redispersibility. It can be re-emulsified into a stable polymer emulsion even after the addition of water, and its chemical properties are identical to the initial emulsion. Therefore, it makes it possible to produce high quality dry-mixed mortar with.
★Stronger adhesion and mechanical properties.
★Outstanding water repellency.
★Excellent alkali resistance, abrasion resistance.
★Increased open time, improved compatibility.
The modification of mortar by re-dispersible emulsion powder is achieved by the polymer forming a film with high adhesion between the cement paste and the aggregate, and blocking the voids in the mortar. Cement hydration and polymer film formation take place simultaneously. Resulting in an interpenetrating network structure, in which the cement paste and polymer film are interwoven with each other. Polymers with reactive groups react chemically with the silicates on the surface of the solid calcium hydroxide. The bond between the cementation product and the aggregate is improving, thus enhancing the performance of the mortar.
Scope of application
Redispersible emulsion powder, mainly used in dry-mix mortars, is now widely used in construction projects for the following dry-mix mortars.
★Bonding mortar: thermal insulation bonding, tile bonding, caulking, etc.
★Plastering mortars: thermal insulation plastering, internal and external wall priming plastering, coloured decorative mortars, etc.
★Masonry mortar: ordinary masonry mortar, thermal insulation masonry mortar, etc.
★Flooring mortar: coloured flooring mortar, waterproof and wear-resistant mortar, self-levelling mortar, etc.
★Special mortars: interface agents, repair agents, etc.
The role of re-dispersible emulsion powder in mortar.
1.Improve the compressive strength and flexural strength of mortar.
2.The addition of the emulsion powder increases the elongation of the mortar and thus improves 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. While the adhesive powder has a certain permeability. And cellulose ether together with the full infiltration of the surface of the grassroots material. So that the grassroots and the new plaster surface properties close. Thus, the adsorption is improving and its performance is greatly increasing.
4.Reduces the elastic modulus of the mortar, improves the deformation capacity and reduces the cracking phenomenon.
5.Improve the abrasion resistance of the mortar. Improved abrasion resistance: mainly due to the presence of a certain amount of rubber hinges on the surface of the mortar, which acts as a bonding agent. The mesh structure formed by the glue powder can pass through the pores and fissures in the cement mortar. It improves the bond between the base material and the hydration products of the cement, thus increasing the wear resistance.
6.Gives the mortar excellent alkali resistance.