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High-efficiency rheology modifier delivering excellent viscosity build and shear-thinning behavior in waterborne systems.
Carboxylated acrylic polymer offering outstanding compatibility with latexes, surfactants, and common additives in architectural and industrial coatings.
Enables robust storage stability and freeze-thaw resistance without compromising application performance.
Low-VOC formulation compliant with global environmental regulations including EU Ecolabel and U.S. EPA Safer Choice criteria.
Provides superior sag resistance and leveling balance in high-solids, low-shear formulations.
Interior and exterior architectural paints (flat, satin, and semi-gloss emulsions).
Water-based wood finishes and varnishes requiring non-drip control and brush/roller flow.
Industrial maintenance coatings for metal and concrete substrates.
Tile grouts and cementitious repair mortars where water retention and workability are critical.
Adhesives and sealants requiring controlled rheology and open-time extension.
| Chemical Type | Carboxylated acrylic copolymer |
| Product Form | Aqueous dispersion |
| Appearance | Opaque white liquid |
| pH (10% aqueous solution) | 3.5 – 4.5 |
| Solids Content (wt%) | 28.0 – 32.0 |
| Density (25°C, g/cm³) | 1.02 – 1.06 |
| Viscosity (Brookfield RVT, spindle #3, 20 rpm, 25°C, mPa·s) | 1,500 – 4,500 |
| Primary Applications | Rheology modification in waterborne coatings, adhesives, and construction materials |
Q1: What is the primary function of Coapur 520 W in waterborne formulations?
A: Coapur 520 W is a carboxylated acrylic polymer designed to provide efficient rheology control—particularly high-shear viscosity reduction and improved flow/leveling—while maintaining low-shear viscosity and sag resistance in water-based coatings, adhesives, and construction mortars.
Q2: How does Coapur 520 W differ from non-carboxylated thickeners like HEC or HASE types?
A: Unlike associative thickeners that rely on hydrophobic interactions, Coapur 520 W functions primarily through ionic and hydrogen-bonding mechanisms enabled by its carboxyl groups. This gives it enhanced compatibility with ionic surfactants, better tolerance to freeze-thaw cycling, and reduced sensitivity to pH drift compared to many HASE systems.
Q3: Is Coapur 520 W suitable for use in low-VOC or zero-VOC formulations?
A: Yes—Coapur 520 W is supplied as a water-based dispersion with negligible VOC content and no added APEOs or formaldehyde donors, making it well-suited for compliance with stringent environmental regulations and sustainability-driven formulation goals.
Q4: How should Coapur 520 W be incorporated into a formulation?
A: It is typically added during the let-down stage, after pigments and fillers are dispersed. For optimal performance, gradual addition with moderate agitation is recommended. Pre-dilution with water or co-solvent may improve dispersion uniformity, especially in high-solids systems.
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E-mail: wangxingqiang@ericwchem.com
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