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Elementis Deqian DAPRO W-77 is a special surface tension adjuster for aqueous systems under Elementis Deqian, specially developed for substrate wetting and coating defect optimization of aqueous coatings, adhesives and other systems. It acts as an interfacial tension buffer medium, effectively eliminating uneven coating, fish eyes and pinholes
Interfacial tension adjustment - Acts as a buffer medium for high and low surface tension, optimizing interlayer and substrate wettability
Coating defect inhibition - Effectively eliminates pinholes and fish eyes, improving uneven surface coating
Excellent substrate adaptability - Promotes uniform coating on hard-to-wet/contaminated substrates, improving film formation quality
Superior recoatability - Enhances interlayer adhesion of coatings, ensuring stable secondary coating effect
Compliant and environmental formula - Silicone-free and APEO-free, non-volatile content complies with relevant FDA regulations
Water-based industrial coatings - Various water-based industrial protective coatings, improve substrate wetting and leveling
Water-based wood coatings - Water-based wood coatings, eliminate pinholes and improve film formation flatness
Water-based inks - Water-based printing inks, optimize color development and substrate adhesion
Water-based leather finishing liquids - Leather water-based finishing materials, improve the uniformity of the finishing layer
Water-based architectural coatings - Water-based interior and exterior wall coatings, improve construction leveling and substrate wetting
| Brand | Elementis Deqian |
| Chemical Type | Silicone substrate wetting agent |
| Chemical Composition | Modified polysiloxane |
| Appearance (25°C) | Amber liquid |
| Non-volatile Content | Approx. 100% |
| Specific Gravity (25°C) | Approx. 1.02 |
| Viscosity (25°C) | Approx. 40 cP |
| Recommended Dosage | 0.01-0.5% (based on total formula weight) |
Q1: What types of pigment systems is DAPRO W-77 especially effective for?
A: DAPRO W-77 is particularly effective for wetting and dispersing inorganic pigments such as titanium dioxide, iron oxides, and carbon black, as well as many organic pigments commonly used in waterborne architectural and industrial coatings.
Q2: Is DAPRO W-77 compatible with other common additives in waterborne formulations?
A: Yes, DAPRO W-77 demonstrates good compatibility with typical waterborne coating additives including rheology modifiers, defoamers, coalescing agents, and biocides—though compatibility testing under specific formulation conditions is always recommended.
Q3: How does DAPRO W-77 contribute to stability in pigment dispersions?
A: It functions primarily through steric stabilization, helping to prevent pigment agglomeration during grinding and storage by adsorbing onto particle surfaces and providing a protective layer that resists re-flocculation.
Q4: Can DAPRO W-77 be used in low-VOC or zero-VOC formulations?
A: Yes, DAPRO W-77 is formulated without volatile organic solvents and supports the development of low-VOC and zero-VOC aqueous systems, aligning with current environmental and regulatory expectations for waterborne coatings.
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E-mail: wangxingqiang@ericwchem.com
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