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High-efficiency associative thickening in waterborne systems without requiring neutralization.
Excellent rheology control with strong pseudoplastic behavior and good sag resistance.
Enhanced compatibility with anionic surfactants, coalescing agents, and common paint additives.
Improved film formation and scrub resistance in architectural coatings.
Low VOC contribution and APEO-free formulation compliant with global regulatory expectations.
Interior and exterior architectural wall paints (latex-based).
Waterborne industrial maintenance coatings.
Textile printing pastes and pigment dispersions.
Adhesives and sealants requiring non-ionic thickening performance.
Construction chemicals including tile adhesives and grouts.
| Chemical Type | Acrylic copolymer, carboxylated associative thickener |
| Product Form | Aqueous dispersion |
| Appearance | Opaque white to off-white liquid |
| pH (1% aqueous solution) | 3.0 – 4.5 |
| Solids Content (wt%) | 29.0 – 31.0 |
| Viscosity (Brookfield RVT, spindle #3, 20 rpm, 25°C) | 500 – 2,500 cP |
| Primary Applications | Architectural coatings, industrial coatings, textile auxiliaries |
| Key Features | Neutralization-free thickening, shear-thinning rheology, surfactant tolerance |
Q1: What is the primary function of Coapur 817W in water-based formulations?
A: Coapur 817W is a carboxylated associative thickener designed to provide efficient rheology control—particularly enhanced mid-shear viscosity and improved sag resistance—while maintaining good flow and leveling in aqueous systems such as architectural coatings, industrial finishes, and construction mortars.
Q2: How does Coapur 817W differ from non-associative thickeners like CMC or HEC?
A: Unlike cellulose-based or non-associative acrylic thickeners, Coapur 817W functions through both electrostatic repulsion (from its carboxyl groups) and hydrophobic association (via pendant alkyl chains), delivering superior viscosity efficiency at low dosage, better compatibility with surfactants and co-thickeners, and improved resistance to water sensitivity and shear thinning.
Q3: Is Coapur 817W suitable for use in low-VOC or zero-VOC formulations?
A: Yes—Coapur 817W is supplied as a water-based dispersion with negligible VOC content and contains no APEOs or formaldehyde donors, making it well-suited for environmentally compliant, low-VOC coating and adhesive systems.
Q4: What is the recommended method for incorporating Coapur 817W into a formulation?
A: It is typically added during the let-down stage, after pigments and fillers have been dispersed. For optimal performance, dilute with water or co-solvent before addition, and ensure adequate mixing time to allow full hydration and associative network development. Avoid high-shear pre-dilution that may disrupt its microstructure.
Q5: Can Coapur 817W be used alongside other thickeners?
A: Yes—it is commonly combined with cellulosics or non-ionic polyurethane thickeners to balance viscosity profile, improve application properties, and enhance storage stability. Compatibility testing is recommended to verify synergy and avoid antagonistic effects in specific formulations.
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