Redispersible Polymer Powder (RDP/VAE) is a free-flowing, white powder obtained by spray-drying polymer emulsions. It is widely used in construction materials, especially in dry-mix mortars, to improve their performance and properties. When mixed with water, RDP can re-emulsify and form a film, providing enhanced adhesion, flexibility, water resistance, and workability to the final product.
Specification:
| Item | Specification / Value |
|---|---|
| Product Name | Redispersible Polymer Powder |
| Appearance | White free‑flowing powder |
| Solid Content (%) | ≥ 98.0 |
| Ash Content (%) | 10-12% |
| Minimum Film Forming Temperature (MFFT) | Approx. 0–6 °C |
| Glass Transition Temperature (Tg) | Approx. –5 – 0 °C (depending on grade) |
| Bulk Density (g/L) | Typical 400–600 |
| pH Value | ~6–8 |
Key Properties
Redispersibility: RDP can re-emulsify in water, forming a film upon drying.
Adhesion: Improves bonding strength to various substrates.
Flexibility: Enhances crack resistance and durability.
Water Resistance: Reduces water absorption and improves moisture resistance.
Workability: Improves the application and handling of mortars.
Cohesion: Enhances internal bonding and mechanical strength.
Advantages
Improved Performance: Enhances the mechanical and physical properties of construction materials.
Ease of Use: Can be easily mixed with dry ingredients.
Versatility: Compatible with a wide range of building materials.
Durability: Increases the lifespan of construction products.
Environmental Benefits: Reduces the need for on-site mixing and waste.
Applications
RDP is widely used in the construction industry, particularly in:
Tile Adhesives:
Improves adhesion, flexibility, and water resistance.
Exterior Insulation and Finish Systems (EIFS):
Enhances crack resistance and durability.
Self-Leveling Flooring Compounds:
Improves flowability, adhesion, and strength.
Repair Mortars:
Provides excellent bonding and durability.
Waterproofing Membranes:
Enhances water resistance and flexibility.
Gypsum-Based Products:
Improves workability and reduces cracking.
Cementitious Renders and Plasters:
Enhances adhesion, flexibility, and water resistance.
