STD4056 Modified cellulose ether for gypsum base
Category：Paint chemicals
Introduction
Good balance of gypsum mortar properties, including excellent workability, excellent thickening, excellent water retention at high temperatures and high water demand.
Product Overview
STD4056 is a specialized modified cellulose ether designed for gypsum-based formulations, offering superior water retention, workability, and adhesion properties. It enhances the performance of gypsum plasters, joint compounds, and other gypsum products by improving consistency, reducing cracking, and optimizing setting time.
Basic Physical & Chemical Properties
| Property | Specification | Test Method |
|---|---|---|
| Appearance | Fine white to off-white powder | Visual inspection |
| Bulk Density (g/cm³) | 0.30–0.50 | ISO 60 |
| Moisture Content | ≤5.0% | Karl Fischer titration |
| pH (1% aqueous solution) | 6.0–8.5 | Potentiometric method |
| Solubility | Cold water-soluble | Dissolution test |
Key Performance Characteristics
| Feature | Benefit in Gypsum Applications |
|---|---|
| High water retention | Prevents premature drying, reducing shrinkage cracks |
| Excellent workability | Improves spreadability and toolability |
| Controlled setting time | Optimizes hardening without delaying production |
| Enhanced adhesion | Reduces delamination and improves substrate bonding |
| Pseudoplastic behavior | Ensures smooth application with minimal sagging |
Recommended Dosage in Gypsum Formulations
| Application | Function | Dosage Range (% by weight) |
|---|---|---|
| Gypsum plaster | Workability & crack resistance | 0.1–0.3% |
| Joint compounds | Adhesion & smooth finish | 0.2–0.4% |
| Self-leveling underlayments | Flowability & stability | 0.3–0.5% |
| Gypsum-based adhesives | Bond strength & open time | 0.2–0.4% |
| Decorative gypsum coatings | Texture retention & workability | 0.1–0.3% |
Solution Properties (2% Aqueous Solution, 20°C)
| Parameter | Typical Value | Test Conditions |
|---|---|---|
| Viscosity | 4000–6000 mPa·s | Brookfield RV, spindle #4. 20 rpm |
| Surface tension | 45–55 mN/m | Du Noüy ring method |
| Gelation temperature | >80°C | Visual observation |
| Transparency | ≥80% | Spectrophotometric analysis |
Storage & Handling Guidelines
| Parameter | Recommendation |
|---|---|
| Storage temperature | <30°C, dry environment |
| Shelf life | 24 months in sealed packaging |
| Handling precautions | Avoid dust formation; use PPE if necessary |
| Packaging | 25 kg moisture-resistant bags |
| Compatibility | Stable with most gypsum additives |
Conclusion
STD4056 modified cellulose ether is an essential additive for gypsum-based products, ensuring superior workability, crack resistance, and adhesion. Its optimized rheological properties make it ideal for high-performance gypsum formulations in construction and decorative applications.
Factory & Shipment
