Best hpmc for wall putty
Best hpmc for wall putty
Blog Article
HPMC (Hydroxypropyl Methylcellulose) is a key additive widely used in wall putty formulations due to its beneficial properties. Here's how HPMC enhances wall putty performance:
Functions of HPMC in Wall Putty:
- Improved Workability:
- HPMC acts as a water-retaining agent and thickener, ensuring a smooth and creamy texture.
- This improves the ease of application, reducing drag during spreading.
- Water Retention:
- It helps retain water in the wall putty, preventing premature drying.
- Ensures adequate curing and bonding with the substrate.
- Enhanced Adhesion:
- HPMC improves the binding properties of wall putty, leading to stronger adhesion to the wall surface.
- Anti-Sagging Properties:
- It provides stability to the wall putty mixture, preventing sagging on vertical surfaces.
- Crack Resistance:
- By ensuring even hydration and minimizing shrinkage, HPMC reduces the chances of cracking during drying.
- Extended Open Time:
- It provides a longer working time, allowing users to adjust and refine the application without rushing.
Typical Dosage:
- The dosage of HPMC in wall putty usually ranges between 0.2% and 0.5% of the total formulation, depending on the specific requirements of workability and performance.
Selection Criteria:
- Viscosity: Select an HPMC cellulose grade with an appropriate viscosity (e.g., 20,000–40,000 cps) to balance workability and stability.
- Purity: Ensure the HPMC is of high purity to avoid yellowing or other undesired effects on the finished surface.
Benefits in Application:
- Improved consistency and finish.
- Higher efficiency due to reduced material waste.
- Enhanced durability and aesthetic appeal of the wall surface.