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High thermal stability with continuous service temperature up to 200 °C.
Excellent weather resistance and UV stability for long-term outdoor performance.
Good compatibility with organic resins (e.g., acrylics, alkyds) enabling hybrid formulation design.
Low surface energy providing inherent water repellency and anti-soiling properties.
Solvent-based liquid form facilitating easy integration into conventional coating and impregnation processes.
High-performance architectural coatings for façades and concrete protection.
Heat-resistant coatings for industrial equipment and exhaust systems.
Water-repellent impregnations for natural stone, masonry, and concrete substrates.
Binders in silicone-modified plaster and render systems.
Functional additives in fire-retardant and intumescent coating formulations.
| Chemical Type | Methyl-phenyl silicone resin |
| Product Form | Liquid, solvent-based (xylene/white spirit blend) |
| Appearance | Clear to slightly yellowish viscous liquid |
| Non-Volatile Content (1 h at 150 °C) | Approx. 60 wt-% |
| Density (20 °C) | Approx. 0.92–0.95 g/cm³ |
| Viscosity (25 °C, DIN 53019) | Approx. 800–1200 mPa·s |
| Primary Applications | Coating binders, impregnation agents, high-temp protective systems |
| Key Features | Thermal stability, weather resistance, hydrophobicity, organic resin compatibility |
Q1: What is the primary function of SILRES MK in coating formulations?
A: SILRES MK acts as a crosslinking agent and surface modifier, enhancing hardness, scratch resistance, and hydrophobicity in solvent-based and high-solids coatings—especially for architectural and industrial applications.
Q2: Is SILRES MK compatible with common organic resins such as acrylics, alkyds, or polyurethanes?
A: Yes, SILRES MK exhibits good compatibility with many organic binder systems. It can be incorporated via simple blending under standard mixing conditions, though optimal dispersion may require mild heating or extended stirring depending on formulation viscosity.
Q3: How does SILRES MK affect film formation and curing behavior?
A: SILRES MK promotes ambient-temperature condensation curing through reactive silanol groups, contributing to improved crosslink density without requiring high-bake conditions. Final film properties develop progressively over days, with full performance typically achieved within 7–14 days under normal humidity.
Q4: Can SILRES MK be used in waterborne systems?
A: While SILRES MK is supplied in organic solvents and not inherently water-dispersible, it can be successfully integrated into waterborne hybrid systems using appropriate emulsification techniques or co-solvent strategies—often in combination with hydrolytically stable silicone-modified emulsifiers.
Q5: What safety and handling precautions should be observed during processing?
A: Standard industrial hygiene practices apply: use in well-ventilated areas, avoid prolonged skin contact, and wear appropriate PPE including nitrile gloves and safety goggles. As with all solvent-based products, ignition sources must be controlled during storage and handling.
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E-mail: wangxingqiang@ericwchem.com
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