Phenyl Vinyl Silicone Resin
Silico® Phenyl Vinyl Silicone Resin is a high-performance resin with phenyl and vinyl groups. It has high heat and UV resistance, a high refractive index, and cures easily.
Common uses include LED encapsulation, optical adhesives, potting, and heat-resistant coatings.
Product Overview
Silico® Phenyl Vinyl Silicone Resin is a high-performance MQ-type silicone resin featuring both phenyl and vinyl functional groups. This dual functionality delivers a unique combination of high refractive index (≥1.54), excellent thermal and UV resistance, and strong film-forming ability. The presence of reactive Si–Vi groups allows for platinum-catalyzed addition curing or peroxide crosslinking, making it suitable for use in a wide range of advanced applications.
Typical end uses include LED encapsulation, optical adhesives, electronic potting compounds, heat-resistant coatings, and pressure-sensitive adhesives where clarity, durability, and high-temperature stability are essential.
Technical Specifications
| Property | Typical Value | Notes |
|---|---|---|
| Appearance | Colorless to light yellow transparent liquid | Visual inspection – consistent across suppliers |
| Viscosity (25 °C) | 7,000 – 60,000 mPa·s | Grade-dependent; e.g., PV-39 ≈ 15,000 mm²/s |
| Vinyl Content | 3.0 – 5.6 wt% | Reactive Si–CH=CH₂ groups |
| Phenyl Content | ~49 wt% | Enhances thermal & optical stability |
| Refractive Index (25 °C) | 1.532 – 1.542 (up to 1.5545) | High clarity for optical materials |
| Volatile Content (150 °C/3h) | ≤ 1.0 wt% | Low outgassing; suitable for electronic use |
| Solid Content | Typically ~50 wt% (solvent-based) | 100% active grades available upon request |
Key Applications
LED Encapsulation & Optical Materials
High refractive index and superior transparency make Silico® PV resins ideal for LED lenses, light-diffusing coatings, and display adhesives.Electronic Potting & Protection
Excellent dielectric strength and moisture resistance for use in transformers, coils, and circuit board encapsulation.Heat-Resistant Coatings
Forms durable, glossy films on metal, glass, and ceramic surfaces that withstand high temperatures and UV exposure.Silicone Pressure-Sensitive Adhesives (PSA)
Vinyl reactivity enables co-crosslinking with PDMS systems for strong, long-lasting adhesion even at elevated temperatures.High-Transparency RTV/Liquid Silicone Rubber (LSR)
As a base or co-matrix resin for optical-grade RTVs or high-refractive silicone rubbers.
Core Benefits of Silico® Phenyl Vinyl Silicone Resin
High Refractive Index (≥1.54)
Delivers outstanding brightness and clarity in optical-grade silicone formulations.Excellent UV & Thermal Resistance
Phenyl groups offer strong resistance to yellowing, degradation, and heat-induced discoloration.Si–Vi Functionality for Efficient Curing
Compatible with platinum-catalyzed addition or peroxide crosslinking systems.Hard, Durable Film Formation
Produces scratch-resistant, high-gloss films with excellent adhesion to substrates.Customizable Formulations
Available in various viscosities and functional group contents to meet specific application demands.
Recommended Silico® Grades
| Grade | Viscosity (25 °C) | Vinyl Content | Refractive Index | Recommended Use |
|---|---|---|---|---|
| Silico® PV‑39 | ~15,000 mm²/s | ~5.0 wt% | ~1.541 | LED optics, optical adhesives |
| Silico® LR‑MQP‑72 | 7,000–9,000 mPa·s | 5.17–5.38 wt% | 1.525–1.529 | General coatings & PSAs |
| Silico® LR‑MQP‑171 | 17,000–20,000 mPa·s | 5.30–5.65 wt% | 1.538–1.542 | High-hardness protective coatings |
- Customized grades with specific vinyl or phenyl content available upon request.
Formulation & Processing Guidelines
Curing Methods:
Suitable for platinum-catalyzed Si–Vi addition curing (at 100–180 °C) or peroxide-initiated systems.Blending Options:
Compatible with PDMS, phenyl siloxanes, fumed silica, and various fillers.Dilution:
Soluble in xylene, toluene, and other common organic solvents.
Packaging & Storage
Standard Packaging: 25 kg PE drums, 200 kg steel drums, or IBC containers.
Storage Conditions: Keep in cool, dry, ventilated area away from acids, alkalis, and catalysts.
Shelf Life: 6–12 months in sealed original packaging.
Safety Note: Avoid moisture contamination to prevent premature crosslinking.
Why Choose Silico®?
With over 15 years of silicone material innovation, Silico® provides tailored solutions for optical, electronic, and industrial markets. Our phenyl vinyl silicone resins offer outstanding clarity, thermal reliability, and crosslinking control—making them ideal for manufacturers seeking performance, quality, and consistency.
Jessica G.
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