Redispersible polymer powders are polymer emulsions that have been transformed into powdered thermoplastic resin materials through a series of processes including high temperature and pressure, spray drying, and surface treatment. When mixed with water, these powdered organic binders can be redispersed in water to form new emulsions with essentially the same properties as the original copolymer emulsions.
The addition of redispersible polymer powder to mortar can improve the cohesion, cohesion and flexibility of mortar. First, it can improve the water retention of mortar, form a film and reduce water evaporation. Secondly, it can improve the bond strength of mortar.
Redispersible polymer powder was invented by German Wacker Hemie in 1953, making it possible to produce polymer-modified dry-mixed mortar. The history of dispersible polymer powder is only 50 years old so far. 1953, the first practical dispersible powder in the world was invented in Germany. With the continuous innovation and progress in the production process of subsequent products, a series of results have been achieved and a series of products have been developed in conjunction with subsequent applications.
The first redispersible polymer powder in the world was vinyl acetate homopolymer powder. However, this polymer powder can only be used in non-alkaline systems, because esters or polymers with ester bonds react under alkaline conditions to generate free alcohols or salts, resulting in sudden changes in performance from insoluble to water-soluble, and an increase in glass transition temperature will lose the desired flexibility, or for other reasons. 1960 successfully produced ethylene vinyl acetate copolymer powder (EVA), mainly The internal plasticization of the redispersible polymer powder using the unsaponifiable organic monomer ethylene significantly improves the flexibility of the polymer powder. This polymer powder can be used in alkaline systems of silicate cements.
▲Used as a self-leveling smoothing compound and flooring compound.
▲Provide excellent water repellency and hydrophobic properties.
▲Provide proper adhesion for exterior insulation and finishing systems.
▲Provide excellent slip resistance, impact resistance, and helps reduce the formation of cracks caused by shrinkage.
▲Improve adhesion, flexural strength, plasticity, abrasion resistance and good workability of modified compounds.
▲Improve processability and other important mechanical properties such as tensile, compressive and flexural strengths, and lateral deformation.
▲Cement rendering
▲Wallpaper adhesives
▲Cement-based wall putty
▲Crack filler
▲Gypsum joint filler
▲Bonding mortar
▲Cement-based tile adhesive
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