STDLH Series Unmodified cellulose ether
Category：Paint chemicals
Introduction
It is developed to improve the construction performance of cement-based or gypsum-based dry mortar. It can be used in ready-mixed mortar, plastering, putty, tile adhesive and exterior insulation applications.
Introduction
STDLH series represents a line of premium unmodified cellulose ethers designed for versatile applications in construction, coatings, and other industrial sectors. These products maintain natural cellulose characteristics while providing excellent thickening, water retention, and stabilization properties. Below are five comprehensive tables detailing their specifications and performance characteristics.
General Product Specifications
| Parameter | STDLH-10 | STDLH-20 | STDLH-30 | Test Method |
|---|---|---|---|---|
| Appearance | White powder | White powder | White powder | Visual inspection |
| Moisture content (%) | ≤5.0 | ≤5.0 | ≤5.0 | ASTM D7191 |
| Bulk density (g/cm³) | 0.35-0.45 | 0.40-0.50 | 0.45-0.55 | ISO 697 |
| pH (1% solution) | 6.0-8.5 | 6.0-8.5 | 6.0-8.5 | ASTM E70 |
| Ash content (%) | ≤2.0 | ≤2.0 | ≤2.0 | ISO 2144 |
Viscosity Characteristics (2% aqueous solution at 20°C)
| Grade | Viscosity Range (mPa·s) | Brookfield Spindle | Gelation Temp (°C) |
|---|---|---|---|
| STDLH-10 | 5.000-15.000 | LV-3. 20 rpm | >70 |
| STDLH-20 | 15.000-30.000 | LV-4. 20 rpm | >75 |
| STDLH-30 | 30.000-50.000 | LV-4. 20 rpm | >80 |
Performance in Common Applications
| Application | Recommended Grade | Key Benefits |
|---|---|---|
| Water-based paints | STDLH-10 | Excellent thickening |
| Cement mortars | STDLH-20 | Good water retention |
| Gypsum products | STDLH-30 | Enhanced workability |
| Paper coatings | STDLH-10 | Smooth application |
| Ceramic adhesives | STDLH-20 | Improved open time |
Solubility and Compatibility
| Property | Performance Characteristics |
|---|---|
| Water solubility | Soluble in cold and hot water |
| Organic solvent | Insoluble in most organic solvents |
| pH stability | Stable in pH 3-11 range |
| Electrolyte tolerance | Good resistance to salts |
| Compatibility | Works with most surfactants |
Storage and Handling Guidelines
| Factor | Requirement |
|---|---|
| Shelf life | 24 months in original packaging |
| Storage conditions | Dry, <30°C, <65% RH |
| Packaging options | 20kg bags, 500kg pallets |
| Safety classification | Non-hazardous, non-toxic |
| Handling precautions | Standard dust protection recommended |
Conclusion
The STDLH series of unmodified cellulose ethers offers a natural, high-performance solution for various industrial applications. With different viscosity grades available, these products provide formulators with flexibility in achieving desired rheological properties while maintaining excellent water retention and stabilization characteristics. Their unmodified nature makes them particularly suitable for applications requiring pure cellulose ether performance without additional chemical modifications.
Factory & Shipment
