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FAQs about LANDERCOLL Non-Surface Treated HPMC
FAQs about LANDERCOLL Non-Surface Treated HPMC
1. What is non-surface treated HPMC?
Non-surface treated Hydroxypropyl Methylcellulose (HPMC) is a cellulose ether known for dissolving in water to create a transparent or slightly milky solution. It is widely used in dry mix formulations such as mortar, tile adhesive, putty, and grout, offering enhanced thickening, water retention, and workability.
2. How does LANDERCOLL non-surface treated HPMC behave in hot and cold water?
In different water temperatures, LANDERCOLL exhibits distinct dissolution characteristics:
| Parametri | Hot Water | Cold Water |
|---|---|---|
| Dispersion Time | < 2 minutes | 5–10 minutes |
| Viscosity Development | Immediate | Gradual (requires stirring) |
| Clumping | Minimal | Possible (stirring needed) |
- In hot water: Disperses and dissolves rapidly, forming a smooth, clump-free solution.
- In cold water: Initial clumping can occur but dissolves effectively with proper stirring, resulting in steady viscosity development.
3. Why is LANDERCOLL ideal for dry mix applications?
LANDERCOLL enhances dry mix formulations with features such as:
- Efficient Dispersion: Ensures uniform blending for consistent performance.
- Veden pidättäminen: Minimizes premature drying, improving curing and adhesion.
- Thickening Effect: Enhances product adhesion, cohesion, and stability.
4. What should I do to avoid clumping in cold water?
To prevent clumping during cold water dispersion:
- Gradually add LANDERCOLL while continuously stirring.
- Utilize mechanical stirring for large-scale applications to ensure even distribution.
- Allow sufficient time for the viscosity to fully develop.
5. What are the performance benefits of using LANDERCOLL?
LANDERCOLL offers several advantages:
- Sakeuttaminen: Provides consistent viscosity across applications.
- Veden pidättäminen: Retains moisture to improve adhesion and prevent cracking.
- Työstettävyys: Enhances the flow, spreadability, and open time of mixes.
| Kiinteistö | Specification | Edut |
|---|---|---|
| Viskositeettialue | 5,000 – 200,000 mPa·s | Adaptable to diverse formulations |
| Veden pidättäminen | > 95% | Prevents shrinkage and cracking |
| PH Value (2% Solution) | 5.0 – 8.0 | Compatible with multiple applications |
6. How does LANDERCOLL improve construction materials?
LANDERCOLL enhances construction materials by:
- Increasing Open Time: Extends workability of materials for better application.
- Improving Adhesion Strength: Ensures stronger bonding to surfaces.
- Enhancing Sag Resistance: Reduces sagging in vertical applications.
7. What is the recommended dosage for LANDERCOLL in dry mixes?
Dosage recommendations depend on the specific application:
| Hakemus | Dosage (% of Total Weight) |
|---|---|
| Mortar | 0.2–0.5% |
| Laattaliima | 0.3–0.6% |
| Putty | 0.4–0.7% |
Adjustments can be made based on local raw materials and required performance properties.