STD4155P Modified cellulose ether
Category：Paint chemicals
Introduction
It is a product developed for construction improvement and is widely used in tile adhesives, interior and exterior wall putty applications.
STD4155P Modified Cellulose Ether for Construction Applications
Introduction
STD4155P is a high-performance modified cellulose ether designed for use in construction materials, particularly cement-based and gypsum-based formulations. It enhances workability, water retention, adhesion, and mechanical strength while ensuring optimal processing characteristics. Below are five key tables summarizing its properties, performance benefits, and application guidelines.
Basic Physical & Chemical Properties
| Property | Specification | Test Method |
|---|---|---|
| Appearance | Fine white to off-white powder | Visual inspection |
| Moisture content (%) | ≤ 5.0 | ASTM D7191 |
| Bulk density (g/cm³) | 0.30 – 0.50 | ISO 697 |
| pH (1% aqueous solution) | 6.0 – 8.5 | ASTM E70 |
| Ash content (%) | ≤ 5.0 | ISO 3451 |
Rheological Properties (2% Aqueous Solution, 20°C)
| Parameter | Value/Range | Test Method |
|---|---|---|
| Viscosity (mPa·s) | 15.000 – 60.000 | Brookfield LV, 20 rpm |
| Gelation temperature (°C) | > 70 | Thermal stability test |
| Solubility | Fully soluble in cold water | Visual assessment |
Performance Benefits in Cement & Gypsum Systems
| Property | Effect of STD4155P |
|---|---|
| Water retention | Significantly improves, reducing cracking |
| Workability | Enhances plasticity and spreadability |
| Open time | Extends for better application |
| Adhesion strength | Increases bond to substrates |
| Setting time control | Adjustable with minimal retardation |
Recommended Dosage for Different Applications
| Application | Dosage Range (% by weight of binder) |
|---|---|
| Cement-based tile adhesive | 0.2 – 0.6 |
| Gypsum plaster | 0.1 – 0.4 |
| Self-leveling underlayment | 0.05 – 0.3 |
| Exterior insulation systems (EIFS) | 0.3 – 0.8 |
| Dry-mix mortar | 0.1 – 0.5 |
Compatibility with Common Additives
| Additive Type | Compatibility | Notes |
|---|---|---|
| Redispersible polymer powders (RDP) | Excellent | Enhances flexibility |
| Superplasticizers (PCE, SNF) | Good (may require optimization) | Check viscosity stability |
| Defoamers | Good | No adverse effects |
| Retarders/Accelerators | Good | Adjust dosage as needed |
Conclusion
STD4155P modified cellulose ether is a versatile additive for construction materials, offering excellent water retention, workability, and compatibility with other admixtures. Its balanced rheological properties make it suitable for a wide range of cementitious and gypsum-based formulations.
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