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Hydrophobic and oleophobic surface protection for enhanced dirt resistance.
Excellent thermal stability up to 200 °C for demanding curing conditions.
Low surface energy enabling superior water beading and stain repellency.
Compatible with acrylic, polyester, and alkyd resin systems for broad formulation flexibility.
Non-yellowing performance ensures long-term clarity and color retention in coatings.
Architectural exterior wall coatings requiring weather resistance and self-cleaning properties.
Industrial maintenance coatings for metal substrates exposed to harsh environments.
High-performance wood finishes where moisture barrier and UV resistance are critical.
Automotive refinish clearcoats for improved scratch resistance and gloss retention.
Plastic and composite coatings needing enhanced surface durability and chemical resistance.
| Chemical Type | Alkyl-modified silicone resin |
| Product Form | Liquid concentrate (solvent-based) |
| Appearance | Clear, colorless to pale yellow liquid |
| Solvent System | Aromatic hydrocarbon blend |
| Non-Volatile Content | 50–55 wt% |
| Viscosity (25 °C) | 100–300 cP |
| Density (25 °C) | 0.88–0.92 g/cm³ |
| Flash Point (Tag Closed Cup) | 35–45 °C |
Q1: What is the primary function of COATOSIL DRI in coating formulations?
A: COATOSIL DRI is a hydrophobic silicone resin designed to enhance surface properties—particularly water repellency, stain resistance, and mar resistance—without significantly affecting substrate breathability or film clarity. It functions primarily as a surface modifier that migrates to the air–film interface during cure or drying.
Q2: Is COATOSIL DRI compatible with waterborne systems?
A: Yes, COATOSIL DRI is formulated for compatibility with a broad range of waterborne acrylics, polyurethanes, and hybrid dispersions. It is typically supplied as a stable aqueous dispersion and can be incorporated via simple low-shear mixing at ambient temperature, often during the let-down stage.
Q3: How does COATOSIL DRI differ from conventional silicone oils or emulsions?
A: Unlike fluid silicones, COATOSIL DRI is a reactive, branched silicone resin with silanol and/or alkoxy functionality. This enables covalent integration into the cured film network—providing more durable, non-migrating performance compared to non-reactive silicone additives that may bloom or leach over time.
Q4: Can COATOSIL DRI be used in high-gloss architectural coatings?
A: Yes—it is widely used in premium architectural and industrial coatings where gloss retention, cleanability, and resistance to environmental soiling are critical. Its low surface energy effect is effective even at low addition levels, and it generally does not induce haze or interfere with gloss development when properly dispersed and cured.
Q5: What are typical handling and storage recommendations?
A: Store in original sealed containers at temperatures between 5 °C and 30 °C, away from freezing and direct sunlight. Avoid prolonged exposure to high humidity before use. The product is stable under recommended conditions, but agitation prior to use is advised to ensure uniform dispersion consistency.
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E-mail: wangxingqiang@ericwchem.com
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