STD70MD Unmodified cellulose ether
Category：Paint chemicals
Introduction
It is a product developed to improve the construction performance of cement-based or gypsum-based dry mortar. It can be used in applications such as ready-mixed mortar, plaster, putty, tile adhesive and external wall insulation.
Product Overview
STD70MD is a premium-grade unmodified cellulose ether derived from natural cellulose, offering exceptional purity and consistent performance in various industrial applications. As an unmodified variant, it maintains the inherent properties of cellulose while providing reliable thickening, binding, and stabilization capabilities.
Fundamental Physical Properties
| Property | Specification | Test Method |
|---|---|---|
| Appearance | White fibrous powder | Visual inspection |
| Degree of Substitution | 0.65-0.85 | Titration method |
| Bulk Density | 0.25-0.35 g/cm³ | ISO 60 |
| Moisture Content | ≤8.0% | Karl Fischer |
| Ash Content | ≤0.5% | ISO 2144 |
Solution Characteristics (1% aqueous solution, 25°C)
| Parameter | Typical Value | Measurement Conditions |
|---|---|---|
| Viscosity | 70±10 mPa·s | Brookfield LV, 60 rpm |
| pH Value | 6.5-7.5 | Potentiometric |
| Surface Tension | 52-56 mN/m | Wilhelmy plate |
| Transparency | ≥90% | 650 nm wavelength |
Key Functional Properties
| Characteristic | Performance Benefit |
|---|---|
| High purity | Minimal impact on system chemistry |
| Newtonian flow | Predictable rheological behavior |
| Thermal reversibility | Maintains properties after heating-cooling cycles |
| Biocompatibility | Suitable for food and pharmaceutical applications |
| Film formation | Creates uniform, flexible films |
Industrial Applications
| Application Sector | Primary Function | Concentration Range |
|---|---|---|
| Food industry | Thickener and stabilizer | 0.1-1.0% |
| Pharmaceutical | Tablet binder and disintegrant | 0.5-5.0% |
| Paper coating | Binder and rheology modifier | 0.3-1.5% |
| Textile printing | Thickener for dye pastes | 0.5-2.0% |
| Ceramic processing | Green strength enhancer | 0.2-0.8% |
Storage & Handling Specifications
| Parameter | Requirement |
|---|---|
| Storage conditions | <25°C, <65% RH |
| Shelf life | 36 months |
| Packaging | 20kg multi-wall paper bags |
| Safety classification | Generally Recognized as Safe (GRAS) |
| Handling precautions | Standard industrial hygiene practices |
Technical Notes
Exhibits true solubility in cold water with proper dispersion
Viscosity development requires complete hydration (typically 20-30 minutes)
Compatible with most ionic and non-ionic additives
Not recommended for use in strongly acidic (pH<3) environments
Natural origin makes it suitable for organic formulations
Factory & Shipment
