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High thermal stability with continuous service up to 200 °C.
Excellent weather resistance and UV stability for long-term outdoor performance.
Good compatibility with organic resins and pigments, enabling hybrid formulation design.
Low surface energy resulting in superior water repellency and anti-soiling properties.
Solvent-based liquid format ensures easy handling and integration into existing coating processes.
High-performance architectural coatings for façades and concrete protection.
Heat-resistant coatings for industrial equipment and exhaust systems.
Water-repellent impregnation treatments for natural stone and masonry.
Binders in silicone-modified acrylic or epoxy hybrid topcoats.
Functional additives in fire-retardant and intumescent coating systems.
| Chemical Type | Methyl/phenyl silicone resin |
| Product Form | Liquid, solvent-based (xylene/toluene blend) |
| Appearance | Clear to slightly yellowish, low-viscosity liquid |
| Solids Content | Approx. 30 wt.% |
| Density (20 °C) | Approx. 0.89–0.91 g/cm³ |
| Viscosity (25 °C) | Approx. 20–40 mPa·s (Brookfield LVT) |
| Flash Point (PMCC) | Approx. 35–40 °C |
| Primary Applications | Coating binder, hydrophobing agent, heat-resistant modifier |
Q1: What is the primary function of SILRES BS 30 in coating and ink formulations?
A: SILRES BS 30 acts as a surface modifier and crosslinking aid, enhancing scratch resistance, mar resistance, and substrate wetting—particularly on low-energy surfaces such as plastics and treated metals. It improves film integrity without significantly affecting gloss or transparency.
Q2: Is SILRES BS 30 compatible with water-based systems?
A: Yes, SILRES BS 30 is specifically designed for use in aqueous dispersions and emulsions. It can be incorporated directly into water-based acrylics, polyurethanes, and hybrid systems, often without requiring organic co-solvents—though compatibility should always be verified in the final formulation.
Q3: How does SILRES BS 30 differ from standard silicone oils or fluid resins?
A: Unlike linear silicone fluids, SILRES BS 30 is a branched, partially condensed methyl/phenyl silicone resin with reactive silanol groups. This structure enables covalent integration into polymer networks during curing, delivering more durable surface effects and reduced migration compared to non-reactive silicones.
Q4: What is the typical dosage range for optimal performance?
A: Dosage depends on the specific formulation and desired effect, but SILRES BS 30 is generally effective at low concentrations—typically ranging from 0.1% to 2% by weight relative to total solids. Higher levels may increase hydrophobicity or reduce intercoat adhesion if not balanced properly.
Q5: Does SILRES BS 30 require heat curing to achieve full functionality?
A: While thermal energy accelerates condensation reactions between its silanol groups and other functional components, SILRES BS 30 can also participate in ambient-cure systems—especially when formulated with catalysts or reactive resins that promote room-temperature crosslinking.
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