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HPMC: Complete Technical Guide & Applications
HPMC (Hydroxypropyl Methylcellulose): Technical Specifications & Industry Applications Guide [2024]
Technical Specifications at a Glance:
| Parameter | Specification Range | Industry Standard |
|---|---|---|
| Viscosity Range | 10-200,000 mPa·s | USP/EP/JP |
| Methoxyl Content | 19-30% | ASTM D3876 |
| Hydroxypropyl Content | 7-12% | USP Method |
| Particle Size Distribution | 95% < 100 mesh | ASTM D1921 |
LANDERCOLL HPMC: Technical Grades & Specifications
Construction Grade Specifications
| Product Series | Viscosity (mPa·s) | Application | Recommended Dosage |
|---|---|---|---|
| LANDERCOLL TA-15 | 15,000-20,000 | Tile Adhesives | 0.2-0.5% |
| LANDERCOLL GM-30 | 30,000-40,000 | Gypsum Mortar | 0.1-0.3% |
| LANDERCOLL WP-50 | 45,000-55,000 | Wall Putty | 0.2-0.4% |
Optimal Mixing Ratios:
- Tile Adhesive:
- LANDERCOLL TA-15: 0.3%
- Cement: 25%
- Sand: 74.7%
- Wall Putty:
- LANDERCOLL WP-50: 0.3%
- Calcium Carbonate: 60%
- White Cement: 39.7%
Application-Specific Performance Data
Construction Applications
| Property | Test Method | LANDERCOLL Result | Industry Standard |
|---|---|---|---|
| Water Retention | DIN 18555-7 | >95% | >90% |
| Open Time | EN 1346 | >30 min | >20 min |
| Slip Resistance | EN 1308 | <0.5mm | <1.0mm |
Pharmaceutical Grade Specifications
| Parameter | LANDERCOLL PC Series | Test Method |
|---|---|---|
| Heavy Metals | < 20 ppm | USP <231> |
| Residual Solvents | Meets ICH Q3C | USP <467> |
| Microbial Limits | < 1000 CFU/g | USP <61> |
Step-by-Step Application Guides
Tile Adhesive Preparation Guide
- Pre-mixing:
- Water temperature: 20-25°C
- LANDERCOLL dosage: 0.3% of dry mix
- Mixing Process:
- Add LANDERCOLL to water
- Mix for 2-3 minutes
- Add cement and aggregates
- Final mixing: 3-5 minutes
Troubleshooting Guide
Poor Water Retention
Possible Causes:
- Insufficient HPMC dosage
- Incorrect mixing sequence
- High temperature conditions
- Increase LANDERCOLL dosage by 0.05%
- Follow recommended mixing procedure
- Use cold water in hot conditions
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