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High thermal stability up to 250 °C in continuous service.
Excellent weather resistance and UV stability for long-term outdoor performance.
Good compatibility with organic resins including acrylics and polyesters.
Low surface energy enabling superior water repellency and anti-soiling properties.
Solvent-based liquid formulation for easy integration into coating and impregnation systems.
High-performance architectural coatings for façades and concrete protection.
Heat-resistant coatings for industrial equipment and exhaust components.
Water-repellent impregnation treatments for natural stone and masonry.
Hybrid silicone–organic topcoats for automotive and transportation applications.
Functional additives in fire-retardant and intumescent coating formulations.
| Chemical Type | Phenyl-methyl silicone resin |
| Product Form | Liquid solution |
| Appearance | Clear, colorless to pale yellow liquid |
| Solvent | Xylene / aromatic hydrocarbon blend |
| Non-Volatile Content | Approx. 60 wt % |
| Density (20 °C) | Approx. 0.92 g/cm³ |
| Viscosity (25 °C) | Approx. 15–25 mPa·s (Brookfield, spindle #1, 60 rpm) |
| Primary Applications | Coating binders, hydrophobic additives, heat-resistant matrices |
Q1: What is the primary function of SILRES 64558 VP in coating formulations?
A: SILRES 64558 VP is a vinyl-functional silicone resin designed to enhance surface hydrophobicity, improve scratch resistance, and increase mar resistance in high-performance architectural and industrial coatings. It functions as a reactive modifier that co-cures with organic binder systems.
Q2: Is SILRES 64558 VP compatible with common waterborne acrylic or polyurethane dispersions?
A: Yes, SILRES 64558 VP demonstrates good compatibility with many waterborne acrylic, styrene-acrylic, and anionic polyurethane dispersions when properly dispersed—typically via high-shear mixing or pre-dilution in a suitable solvent or co-solvent system.
Q3: How should SILRES 64558 VP be incorporated into a formulation to ensure optimal performance?
A: For best results, add SILRES 64558 VP during the let-down stage under controlled shear. Pre-dilution in a low-surface-tension solvent (e.g., isopropanol or xylene) may aid dispersion. Avoid excessive high-shear processing after addition to prevent premature agglomeration.
Q4: Does SILRES 64558 VP require heat curing to achieve full functionality?
A: While ambient crosslinking occurs slowly, optimal film properties—including hydrophobicity and mechanical durability—are typically achieved with thermal curing at elevated temperatures (e.g., ≥100 °C), especially when used with thermally activated catalysts or co-resins.
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