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Non-ionic, hydrophobically modified polyurethane (HEUR) rheology modifier.
Delivers excellent mid-to-high shear viscosity control and outstanding sag resistance.
Provides superior compatibility with both water-based acrylic and styrene-acrylic emulsions.
Enables low foam generation and excellent storage stability in formulated systems.
Offers efficient thickening performance at low addition levels (typically 0.1–0.6 wt%).
Architectural interior and exterior wall paints.
Water-based industrial maintenance coatings.
Textile printing pastes and pigment dispersions.
Wood and metal protective coatings.
Tile grout and cementitious waterproofing slurries.
| Chemical Type | Hydrophobically Modified Polyurethane (HEUR) |
| Product Form | Aqueous dispersion |
| Appearance | Opaque white to off-white liquid |
| pH (1% aqueous solution) | 7.0–8.5 |
| Active Content | 25.0 ± 1.0 wt% |
| Viscosity (Brookfield RVT, Spindle #3, 20 rpm, 25°C) | 1,500–4,000 mPa·s |
| Freeze-Thaw Stability | Pass (3 cycles, –15°C/24 h → 25°C/24 h) |
| Primary Applications | Water-based architectural and industrial coatings |
Q1: What type of rheology does Coapur 2025 provide in waterborne systems?
A: Coapur 2025 delivers non-ionic, associative polyurethane thickening behavior, offering balanced viscosity build in both low- and high-shear conditions. It imparts good sag resistance while maintaining acceptable flow and leveling in architectural and industrial coatings.
Q2: Is Coapur 2025 compatible with other rheology modifiers or additives?
A: Yes — Coapur 2025 is generally compatible with cellulose ethers, acrylic thickeners, and defoamers commonly used in waterborne formulations. However, optimal performance is achieved when added after neutralization of carboxylated resins and following careful compatibility testing in the final system.
Q3: How should Coapur 2025 be incorporated into a formulation?
A: It is recommended to add Coapur 2025 during the let-down stage, under moderate agitation, directly into the aqueous phase or pre-diluted with water. Avoid high-shear addition to minimize air entrapment and ensure uniform dispersion.
Q4: Does Coapur 2025 affect film formation or drying characteristics?
A: As a non-volatile, film-inert associative thickener, Coapur 2025 remains in the dried film but does not interfere with coalescence or crosslinking of typical latex or hybrid binders. It generally has minimal impact on final film clarity, flexibility, or water resistance when used at recommended dosage levels.
Q5: What are the storage and handling recommendations for Coapur 2025?
A: Store in original sealed containers at temperatures between 5 °C and 30 °C, away from direct sunlight and freezing conditions. The product is stable for up to 12 months under proper storage. Before use, inspect for signs of phase separation or microbial growth; gentle stirring may restore homogeneity if needed.
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E-mail: wangxingqiang@ericwchem.com
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