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Delivers excellent rheology control in both low- and high-shear conditions for balanced application and sag resistance.
Provides superior compatibility with acrylic, styrene-acrylic, and vinyl acetate-based emulsions.
Offers outstanding freeze-thaw stability and long-term storage performance in waterborne systems.
Enables low foaming and minimal impact on gloss, clarity, and color development.
Designed for easy incorporation—requires no neutralization or pre-dilution before use.
Interior and exterior architectural wall paints.
Decorative and protective industrial coatings.
Waterborne wood finishes and stains.
Low-VOC and zero-VOC coating formulations.
Textured and specialty decorative coatings.
| Chemical Type | Associative polyurethane (HEUR) |
| Product Form | Clear to slightly hazy liquid |
| Appearance | Colorless to pale yellow, homogeneous liquid |
| Primary Applications | Waterborne architectural and industrial coatings |
| Key Features | Rheology modifier, associative thickener |
| Benefits | Improved leveling, spatter resistance, and brush/roller drag |
| pH Range (as supplied) | 6.5 – 8.5 |
| Active Content (approx.) | 30 wt% |
Q1: What is the primary thickening mechanism of COAPUR 830W?
A: COAPUR 830W functions via associative thickening—its hydrophobic end groups interact with other hydrophobic sites in the formulation (e.g., surfactants, polymer particles, or resin micelles), forming a reversible, three-dimensional network that imparts viscosity and improves rheological performance.
Q2: Is COAPUR 830W compatible with high-shear applications such as spray application or roller coating?
A: Yes—COAPUR 830W delivers strong pseudoplastic behavior and excellent shear-thinning characteristics, enabling good atomization during spraying while maintaining sag resistance and brush/roller drag control under low-shear conditions.
Q3: How does COAPUR 830W perform in low-VOC or waterborne systems?
A: As a non-ionic, solvent-free associative polyurethane thickener, COAPUR 830W is well-suited for low-VOC and waterborne formulations, including acrylic and styrene-acrylic dispersions, where it provides stable viscosity build without compromising film formation or clarity.
Q4: Can COAPUR 830W be used in combination with other thickeners?
A: Yes—COAPUR 830W is frequently combined with cellulosic or acrylic thickeners to fine-tune rheology profiles, balancing high-shear flow, low-shear structure, and storage stability. Compatibility testing is recommended to ensure optimal synergy and avoid antagonistic interactions.
Q5: What is the typical dosage range for COAPUR 830W in architectural coatings?
A: Dosage depends on formulation requirements and desired rheology, but COAPUR 830W is typically used at low concentrations—generally ranging from 0.1% to 2% by weight of the total formulation—to achieve target viscosity and performance attributes.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
