Features Of Coatex Rheotech 4800 Thickener
Strong low-medium shear thickening - Efficiently increases low-medium shear viscosity and yield value, suitable for high PVC systems
Tinting stability & anti-floating - Prevents viscosity drop after tinting, eliminates floating and water separation
Excellent appearance & feel - Gives coatings a creamy appearance, optimizes leveling and application feel
Eco-friendly compliance - Solvent-free, APEO-free and metal-free, meeting zero-VOC standards
Synergistic & economical - Compatible with various rheological additives, dosage 0.01%-0.5%, cost-effectiv
Typical Applications Of Coatex Rheotech 4800 Thickener
High PVC matte coatings - Adapts to low-cost formulations, improving film fullness and application feel
Thick-film coatings/wall powders - Prevents sagging and settling, ensuring construction quality
Pressure-sensitive adhesives - Regulates rheology, improving bonding stability and workability
Tinting base paints - Ensures viscosity stability during tinting, helping uniform color presentation
Zero-VOC eco-friendly coatings - Solvent-free formulation, meeting green production and application requirements
Specifications Of Coatex Rheotech 4800 Thickener
| Brand | Coatex (Arkema Group, France) |
| Chemical Type | Aqueous polypropylene copolymer dispersion (HASE type) |
| Appearance (20℃) | Low-viscosity milky white liquid |
| Active Ingredient | 30±1% |
| pH Value (20℃) | 3±1 |
| Specific Gravity (20℃) | 1.06±0.02 g/cm³ |
| Applicable pH Range | 8.5-9 |
Coatex Rheotech 4800 Thickener – Frequently Asked Questions (FAQ)
Q1: What type of rheology modifier is Coatex Rheotech 4800?
A: Coatex Rheotech 4800 is a high-performance associative thickener based on hydrophobically modified ethoxylated urethane (HEUR) chemistry, designed to provide strong pseudoplastic flow behavior and excellent sag resistance in waterborne systems.
Q2: In which types of formulations is Rheotech 4800 most commonly used?
A: It is widely used in architectural coatings (e.g., interior and exterior paints), industrial maintenance coatings, and water-based adhesives where balanced viscosity development, good leveling, and resistance to spattering during application are required.
Q3: How should Rheotech 4800 be incorporated into a formulation?
A: It is typically added during the let-down stage, after pigments and fillers have been dispersed. Pre-dilution with water or a compatible solvent is recommended for optimal incorporation and to avoid localized over-thickening. Stirring should be continued until full viscosity development is achieved.
Q4: Is Rheotech 4800 compatible with other thickeners?
A: Yes, it can be effectively combined with cellulosic or acrylic thickeners to fine-tune rheological profiles—such as enhancing low-shear viscosity while maintaining good high-shear flow—though compatibility testing in the final formulation is advised to ensure stability and performance consistency.
Q5: Does Rheotech 4800 require pH adjustment for activation?
A: No, unlike alkaline-swellable thickeners (ASE), Rheotech 4800 is pH-independent and delivers consistent thickening performance across a broad pH range (typically pH 4–12), making it suitable for both neutral and mildly acidic or alkaline systems.
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