Lotte (Former Samsung) MECELLOSE FMC8821 is a high-quality enzyme-resistant methyl hydroxyethyl cellulose in the MECELLOSE series. Designed for aqueous systems with high viscosity requirements such as water-based coatings and inks, it acts as a high-performance non-ionic thickener
Efficient Thickening Adaptation - High viscosity feature, precisely regulating system rheology to match dual requirements of high and low viscosity
Outstanding Enzyme-Resistant Stability - Enzyme-resistant formula, inhibiting microbial degradation and maintaining long-term system viscosity stability
Long-Term Water Retention Enhancement - Excellent water retention, reducing rapid water evaporation and improving application leveling
Mild System Compatibility - Neutral pH feature, compatible with most aqueous additives, adapting to a wide range of formula systems
Aqueous Architectural Coatings - Used in interior and exterior emulsion paints to meet requirements of high storage viscosity and low application viscosity
Aqueous Industrial Coatings - Used in aqueous wood paints and metal paints to improve system stability and film texture
Architectural Aqueous Putties - Used for thickening aqueous putties to optimize troweling performance and molding stability
Aqueous Adhesives - Used in aqueous woodworking adhesives and architectural adhesives to enhance
| Viscosity Range | 3500 - 5000 mPa·s |
| Particle Size | 98% < 425 μm |
| Moisture Content | Max. 4 % |
| Salt Content | Max. 5 % |
| pH Value (1% Solution) | Neutral |
| Aqueous Solution Surface Energy | Weak |
Q1: What is the primary functional role of Lotte MECELLOSE FMC8821 in aqueous formulations?
A: Lotte MECELLOSE FMC8821 functions primarily as a non-ionic rheology modifier and thickener in water-based systems. It provides excellent viscosity build-up, good shear-thinning behavior, and enhances suspension stability without significantly affecting surface tension or foaming characteristics.
Q2: How does FMC8821 compare to other hydroxyethyl cellulose grades in terms of solubility and dissolution speed?
A: FMC8821 is engineered for rapid, low-froth dispersion and efficient cold-water hydration. Compared to standard HEC grades, it exhibits improved ease of incorporation and reduced gel lump formation during powder addition—particularly beneficial in high-shear mixing environments common in industrial paint and coating production.
Q3: Is FMC8821 compatible with common biocides and electrolytes used in architectural coatings?
A: Yes, FMC8821 demonstrates robust compatibility with a broad range of isothiazolinone and benzisothiazole-based biocides, as well as typical inorganic salts (e.g., calcium carbonate, titanium dioxide dispersants) found in latex-based paints and plasters. Viscosity retention remains stable under moderate electrolyte loading conditions.
Q4: What are the recommended handling and storage conditions to maintain product performance?
A: Store in original sealed packaging in a cool, dry environment away from direct sunlight and sources of moisture. Avoid exposure to high humidity during handling, as prolonged ambient moisture can lead to partial agglomeration and affect dispersion efficiency. Use within 24 months of manufacture when stored properly.
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