Redispersible polymer powder (RDP) is a white-colored free-flowing chemical compound used widely in the construction industry. It is applied by spray-drying the polymer dispersions on the concrete surface. When RDP is added in water, the polymer powders disintegrate and create separate polymer dispersions, which retain the properties of the original dispersion.
RDP, such as Addage AKULPOL 9192 (RD Powder for Wall Putty) is an excellent example of high-quality RDP powder, manufactured by Sakshi Chem Sciences Pvt Ltd. in India. The RDP powder is often added to mortar or wall putty to enhance the cohesiveness and flexibility of the cement mix. It creates a thin but consistent layer over the applied surface which enhances water retention, improves the overall adhesive strength, and improves the workability of dry mix mortar and wall putty.
In this article, we will find out how RD Powder improves the workability and finish of wall putty and mortar during the construction phase.
Composition of RD Powder
The redispersible polymer powder is usually white in color but also comes in a variety of other colors. The common components of RDP, such as Addage AKULPOL 9192 (RD Powder for Wall Putty) include:
- Polymer Resin
Polymer resin is the core component of RDP, which also includes other polymer compounds, such as hexane resin and polyvinyl acetate.
- Additives
It is usually a chemical compound that modifies the main properties of the resin. For instance, an additive can be a plasticizer that reduces the temperature of the resin to form a film, which is normally ethylene copolymer resin or vinyl acetate. It may also include super water reducers in some flow-assisted RD powders. However, not every RDP has an additive in it.
- Protective Colloid
This includes a hydrophilic compound which covers the particles of the RD powder. Polyvinyl alcohol is one of the most common protective colloids used in manufacturing RDP.
- Anti-Caking Agent
Anti-caking agents are fine mineral fillers which are mostly useful to prevent the RDP from clumping together during transportation. It also ensures smoother flow of RD powder, when transferring from bag to mixer.
Production Process of Redispersible Polymer Powder
Redispersible Polymer Powder is a latex emulsion formed by spray-drying macromolecular dispersions under controlled conditions.
The production process involves adding polyvinyl alcohol to prevent the latex particles from clumping together. These polymer powders usually contain additional components, such as polyvinyl acetate, vinyl versatate, ethylene, or acrylic polymers. It also contains polymer resins which are essential to not just disperse the particles evenly but also to enable the RDP’s functions.
Polymer powders, when used as an additive in RDP, act as a polymer resin or modified resin.
Benefits of RD Powder in Construction
Now that you know the components and manufacturing process, let’s find out the various benefits of using RD Powder with wall putty and dry mix mortar –
Enhanced Workability
The main reason for using RD powder with wall putty or mortar is that it improves the workability of the construction materials. RD Powder makes it easier to mix, apply and use dry mix mortar and wall putty. With this, it is possible to lower overall labor costs and to improve the productivity of construction projects.
RD Powder improves the slump, fluidity and workability of wall putty and concrete remarkably. This helps to achieve a uniform high-quality finish. It also prevents bleeding of materials during transportation and placement as well as segregation of construction materials.
Improved Adhesion
RD Powder also enhances the adhesive powers of wall putty and dry mix mortar. It creates a strong bond between the substrate and construction material. This helps to improve the construction material’s resistance to spalling, cracking, and delamination.
Hence, using RD Powder gives walls and floors a durable and smooth finish. It can also be used to enhance the adhesion of construction materials to different substrates, such as metal, wood, and concrete.
Better Water Resistance
RD Powder, such as Addage AKULPOL 9192 (RD Powder for Wall Putty) forms a hydrophobic layer on the wall putty or mortar which actively repels water and improves the overall water resistance of the surface. This is highly useful to protect walls and other surfaces that are prone to getting wet, such as floors, roofs, and exterior walls. Hence, RDP prevents moisture damage, such as mold growth and corrosion.
Conclusion
Redispersible polymer powder, such as Addage AKULPOL 9192 (RD Powder for Wall Putty) helps improve the quality of construction from the mixing to finishing stage. This polymer-induced powder contains essential components that enhance the workability of wall putty and mortar, besides providing excellent water resistance and enhancing strength and adhesion of the construction compounds.
Always buy high-quality RD Powder from Sakshi Chem Sciences for the best desired results.
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