Hydration delayed modified methyl hydroxyethyl cellulose ether
Paint chemicals 2025-03-04
It is used as thickener and rheology modifier, water retention agent, stabilizer and suspending agent, which can give the real stone paint products good workability, anti-flying sand and storage stability, and has good compatibility with various emulsions. When the ambient temperature is high, it is recommended to be used with suitable mold inhibitor or fungicide.
Fundamental Chemical Properties
| Property | Specification |
|---|---|
| Chemical Classification | Cellulose ether derivative |
| Substitution Type | Mixed methyl/hydroxyethyl groups |
| DS (Methyl) | 1.2-1.8 |
| MS (Hydroxyethyl) | 0.2-0.5 |
| Appearance | White to off-white free-flowing powder |
| Bulk Density | 0.3-0.5 g/cm³ |
| pH (1% solution) | 6.0-8.5 |
| Ash Content | ≤5.0% |
Key Performance Characteristics
| Parameter | Test Method | Typical Value |
|---|---|---|
| Hydration Delay Time | 25°C, pH 7 | 5-30 minutes |
| Viscosity (2% solution) | Brookfield, 20 rpm | 5.000-50.000 mPa·s |
| Gelation Temperature | – | 60-75°C |
| Water Retention | DIN 18555-7 | ≥95% |
| Enzyme Resistance | – | High stability |
Application Specifications
| Application | Technical Parameters |
|---|---|
| Dry-mix Mortars | 0.1-0.5% by weight |
| Tile Adhesives | Delayed hydration: 10-20 min |
| Self-leveling Compounds | Viscosity build-up: 15-30 min |
| Gypsum Products | Water retention: ≥90% |
| Paint Thickening | 0.2-1.0% addition |
Key Advantages:
Controlled hydration delay for extended workability
pH-dependent solubility for optimized performance
Thermally reversible gelation
Improved anti-sag properties
Reduced dust formation during handling
