Redispersible Polymer Powder (RDP) is a water-soluble polymer powder that is widely used in construction materials to improve the performance of cementitious materials such as mortar, tile adhesives, and grouts. The working mechanism of RDP is based on its ability to enhance the properties of cementitious materials through the formation of a flexible and durable polymer film.
When added to a cementitious material, RDP particles are dispersed in water and become activated. The particles then begin to hydrate and dissolve, releasing the polymer into the mixture. The polymer molecules attach to the cement particles and form a flexible film that enhances the adhesion and strength of the material.
The RDP film also improves the flexibility and elasticity of the cementitious material, allowing it to withstand movement and deformation caused by environmental factors such as temperature changes, moisture, and structural movements. Additionally, the film helps to reduce water absorption and increase resistance to chemical attack, resulting in improved durability and longevity.
RDP can also improve workability, reduce shrinkage and cracking, and enhance the overall appearance of the final product. It can be used in a wide range of construction applications, including flooring, walls, and facades.
In summary, the working mechanism of RDP involves the formation of a flexible and durable polymer film that enhances the properties of cementitious materials. The film improves adhesion, strength, flexibility, durability, and water resistance, resulting in a high-performance construction material.