High-Phenyl Silicone Resin
Silico® High-Phenyl Silicone Resin is a high-performance resin with 20–55% phenyl content. It offers excellent heat resistance, UV stability, and electrical insulation.
It works well in harsh conditions over 300 °C, making it ideal for heat-resistant coatings, insulating varnishes, and resin modification.
Product Overview
Designed for use in extreme environments, Silico® high-phenyl resins form durable, crosslinked films that exhibit long-term performance at temperatures exceeding 300 °C, making them ideal for heat-resistant coatings, insulating varnishes, and resin modification.
Typical Technical Specifications
| Property | Typical Value | Notes |
|---|---|---|
| Appearance | Colorless to light yellow transparent liquid | — |
| Phenyl Content | ≥ 20 mol % (some grades ≥ 55 mol %) | Defines “high-phenyl” class |
| Viscosity (25 °C) | 5–60,000 mPa·s (grade dependent) | Flow ranges from low to high viscosity |
| Solids Content | 50–60 wt % (for solvent-based grades) | Compatible with aromatic and eco-solvents |
| Refractive Index | 1.525–1.540 | Increases with phenyl content |
| Specific Gravity | ~1.16 g/cm³ | Measured at 25 °C |
| Thermal Stability | ≤ 5 % weight loss @250 °C for 3 hrs | Thermogravimetric analysis (TGA) |
Key Applications
High-Temperature Coatings
For chimneys, exhausts, engine components, and industrial ovens. Long-term stability at 300 °C+, with short-term resistance up to 650 °C when formulated with aluminum pigments.Electrical Insulation & Encapsulation
Applied in insulating varnishes for motors, transformers, and electrical components. High dielectric strength and corona resistance.Organic Resin Modification
Used as a co-binder or performance modifier for epoxy, polyester, acrylic, and alkyd systems to improve thermal stability, hardness, and weatherability.Transparent Varnishes & Protective Films
Excellent optical clarity, gloss retention, and anti-yellowing performance under UV and high heat.
Core Advantages of Silico® High-Phenyl Resins
Outstanding Thermal Stability
Phenyl-rich structure ensures stable performance at 300–650 °C, making it suitable for extreme temperature applications.Superior UV and Weather Resistance
Phenyl groups absorb UV light (<280 nm), providing long-term durability and anti-yellowing properties.High Mechanical Strength
Forms hard, yet flexible films with excellent adhesion, crack resistance, and hydrophobicity.Excellent Electrical Insulation
High surface and volume resistivity; suitable for electronic coatings and corona-resistant layers.Flexible Processing Options
Available in solvent-based and solvent-free formats, suitable for air-drying or heat-cure systems.
Recommended Grades
| Silico® Product | Phenyl Content | Viscosity | Application |
|---|---|---|---|
| Silico® SP605‑2 | ≥ 55 mol % | 5–20 mPa·s | Clear varnish, optical coatings, modifiers |
| Silico® SP606‑3 | High | 40,000–60,000 mPa·s | Protective coatings, electrical insulation |
| Silico® SR255 | Medium | ~800 mPa·s | Heat-resistant and anti-corrosion coatings |
| Silico® PHM-Q1015 | 100% active | ~50 mPa·s | Solvent-free, ultra-high temperature resistant |
- Custom grades and dilutions available upon request.
Formulation & Curing
Solvent Compatibility: Compatible with xylene, toluene, methylated solvents, and low-VOC carriers.
Curing Options:
Ambient Cure: Moisture-curable for convenience.
Thermal Cure: Recommended curing at 180–250 °C for optimal film strength.
Additive Use: Can be blended with aluminum paste, epoxy/acrylic resins, or fillers to enhance performance.
Packaging & Storage
Packaging: 25 kg pails, 200 kg steel drums, or custom IBC tanks.
Shelf Life: 12 months in original sealed packaging under cool, dry storage.
Handling: Use protective gloves and goggles. Ensure adequate ventilation during processing.
Available Documentation
Technical Data Sheets (TDS)
Safety Data Sheets (SDS)
Application Guidelines & Formulation Templates
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