STD10W Hydroxyethyl Cellulose Ether for Water-based Emulsion Paint
Category：Paint chemicals
Introduction
It is a highly efficient nonionic thickener, water retention agent and rheology aid that can be used in all types of water-based emulsion paints and surface coatings. It has good microbial stability and can provide superior resistance to biological and chemical degradation.
Introduction
STD10W is a high-purity hydroxyethyl cellulose (HEC) ether specifically designed for water-based emulsion paints. It provides excellent thickening, water retention, and stability, enhancing paint performance in terms of application, film formation, and durability. Below are five detailed tables summarizing its properties, performance benefits, and formulation guidelines.
Basic Physical & Chemical Properties
| Property | Specification | Test Method |
|---|---|---|
| Appearance | White to off-white powder | Visual inspection |
| Moisture content (%) | ≤ 5.0 | ASTM D7191 |
| Bulk density (g/cm³) | 0.35 – 0.50 | ISO 697 |
| pH (1% aqueous solution) | 6.0 – 8.5 | ASTM E70 |
| Ash content (%) | ≤ 2.0 | ISO 2144 |
Rheological Properties (2% Solution at 25°C)
| Parameter | Value/Range | Test Method |
|---|---|---|
| Brookfield viscosity (mPa·s) | 10.000 – 20.000 | LV-3 spindle, 20 rpm |
| Gelation temperature (°C) | > 85 | Thermal stability test |
| Solubility | Instant in cold water | Visual assessment |
| Thixotropy | Moderate | Rheometer measurement |
| Water retention (%) | ≥ 95 | Filter paper method |
Performance Benefits in Water-based Paints
| Property | Effect of STD10W |
|---|---|
| Thickening efficiency | High, improves brushability |
| Sag resistance | Prevents dripping on vertical surfaces |
| Spatter resistance | Reduces paint spatter during application |
| Film formation | Enhances smoothness & leveling |
| Storage stability | Prevents syneresis & settling |
Recommended Dosage for Different Paint Formulations
| Application | Dosage (% by total weight) | Key Benefit |
|---|---|---|
| Interior wall paints | 0.2 – 0.6% | Improved coverage & flow |
| Exterior wall paints | 0.3 – 0.8% | Enhanced weather resistance |
| High-gloss paints | 0.1 – 0.4% | Maintains gloss & clarity |
| Textured coatings | 0.4 – 1.0% | Better structure retention |
| Primer coatings | 0.2 – 0.5% | Good penetration & adhesion |
Compatibility with Paint Additives
| Additive Type | Compatibility | Remarks |
|---|---|---|
| Dispersants | Excellent | No viscosity loss |
| Defoamers | Good | No adverse effects |
| Coalescing agents | Excellent | Improves film formation |
| Biocides | Good | No chemical interaction |
| Pigments & fillers | Excellent | Stable suspension |
Conclusion
STD10W hydroxyethyl cellulose ether is an essential additive for water-based emulsion paints, offering superior thickening, stability, and application properties. Its excellent compatibility with various paint components makes it ideal for formulating high-performance interior and exterior coatings.
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