2024-05-13 by BLOG

Redispersible Polymer Powder (RDP) is a free-flowing white powder obtained by spray-drying various polymer emulsions. These powders can be re-dispersed in water to form a stable emulsion, mimicking the original liquid polymer.

Here's an overview of RDP:

Composition:

  • Polymers: The main component of RDP is synthetic polymers such as vinyl acetate ethylene (VAE), ethylene vinyl acetate (EVA), acrylics, styrene-butadiene (SB), or vinyl acetate versatate (VeoVa). These polymers contribute to the film-forming properties and adhesion of the powder.

  • Additives: Various additives such as dispersants, plasticizers, anti-foaming agents, and thickeners may be included to improve the performance and handling characteristics of the powder.

Properties:

  • Film Formation: RDP forms a flexible and cohesive film when mixed with water, providing excellent adhesion to substrates.

  • Water Redispersibility: RDP can easily disperse in water to form stable emulsions, allowing for easy application.

  • Adhesion: RDP enhances the adhesion of coatings and mortars to various substrates, improving the durability and performance of the final product.

  • Flexibility: RDP imparts flexibility to coatings and mortars, reducing the risk of cracking and improving impact resistance.

  • Water Resistance: RDP improves the water resistance of coatings and mortars, making them suitable for both interior and exterior applications.

  • Workability: RDP improves the workability of formulations, allowing for easier mixing, application, and finishing.

Applications:

  1. Tile Adhesives: RDP is used in tile adhesives to improve adhesion to substrates, flexibility, and water resistance.

  2. Exterior Insulation and Finish Systems (EIFS): RDP enhances the adhesion, flexibility, and water resistance of EIFS coatings.

  3. Self-Leveling Compounds: RDP improves the flow, adhesion, and flexibility of self-leveling compounds.

  4. Mortars and Renders: RDP improves the adhesion, water resistance, and workability of cement-based mortars and renders.

  5. Repair Mortars: RDP is used in repair mortars to improve adhesion, durability, and flexibility.

  6. Skim Coats: RDP improves the adhesion, smoothness, and water resistance of skim coats used for surface finishing.

  7. Grouts and Sealants: RDP enhances the adhesion and flexibility of grouts and sealants, improving their performance and durability.

Benefits:

  • Improved Performance: RDP enhances the adhesion, flexibility, and water resistance of construction materials, improving their durability and performance.

  • Ease of Use: RDP is easy to handle and store in its dry form, and it can be easily dispersed in water for application.

  • Versatility: RDP can be used in a wide range of applications, including tile adhesives, EIFS, mortars, renders, and sealants.

  • Cost-Effectiveness: RDP allows for the formulation of high-performance construction materials at a relatively low cost compared to other additives.

Redispersible polymer powders have become essential additives in the construction industry, contributing to the development of high-quality, durable, and versatile building materials.