Redispersible polymer powders are free-flowing, white powders manufactured by spray-drying polymer dispersions. When added to water, these polymer powders can disintegrate and form individual polymer dispersions again, with identical properties as the original dispersion.
Redispersible polymer powders are added to mortar to increase the flexibility and cohesiveness of mortar. This forms a continuous polymer film that helps improve water retention, enhance the bond strength of mortar, and improve the workability of dry mix mortar.
The redispersible polymer powder is a latex emulsion created by spray-drying macromolecular dispersions under particular conditions. During production, polyvinyl alcohol is added to stop the latex particles bonding together. These polymer powders are usually manufactured based on acrylic polymers, polyvinyl acetate, copolymers of vinyl acetate with vinyl versatate or with ethylene.
RDPs comprise of polymer resin, the crucial ingredient of dispersion particles and an important player for redispersible powders to function. As an additive, polymer powders act as modified resin and polymer resin.
When water is added to the dry mix mortar, the polymer powder becomes a dispersion and forms a film upon drying. This film promotes elasticity and adhesion. Redispersible polymer powders are classified into highly elastic with low adhesion, rigid with high adhesion, and medium elastic with standard adhesion. Water is added to some powders to impart hydrophobic characteristics to the material.
Redispersible polymer powders have numerous applications across various industries. They are widely used in:
Bisley offers a variety of RDP polymer products that can help improve abrasion resistance, flexural strength, gas migration, and workability properties of the mixed mortar. These polymer powders are easily dissolved in water and develop stable emulsions.
Please send us a message online to learn more about the available specifications, grades, packaging, and applications of polymer powders. Our team will help you find an RDP powder product that suits your application.
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Mar 11,
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SLEO Chemical Product Page
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 , making it possible to produce polymer-modified dry-mixed mortar. The history of dispersible polymer powder is only 50 years old so far. , 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. 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
&#;Restoration mortars
&#;Wallpaper adhesives
&#;Cement-based wall putty
&#;Crack filler
&#;Gypsum joint filler
&#;Bonding mortar
&#;Cement-based tile adhesive
For more information, please visit VAE Re-Dispersible Polymer Powder For Etics/Eifs.