Phenyl MQ Silicone Resin
Silico® Phenyl MQ Silicone Resin is a high-quality methyl-phenyl MQ resin with phenyl-modified M and Q units. It offers excellent heat and UV resistance, high refractive index (1.53–1.54), strong film hardness, and low volatility. Ideal for LED encapsulation, UV coatings, PSAs, release liners, and insulation.
Product Overview
Silico® Phenyl MQ Silicone Resin is a premium-grade methyl-phenyl MQ-type organosilicon resin composed of monofunctional trimethylsiloxy (M) units and tetrafunctional siloxane (Q) units, partially substituted with phenyl groups. This structure delivers exceptional thermal stability, UV resistance, high refractive index (1.53–1.54), excellent film hardness, and low volatility.
Thanks to its outstanding compatibility with other silicones and polymers, Silico® Phenyl MQ Silicone Resin is widely used in:
High-temperature resistant and UV-curable coatings
LED encapsulation materials and optical adhesives
Pressure-sensitive adhesives (PSAs)
Release liners and electrical insulation systems
Technical Specifications
| Property | Typical Value | Notes |
|---|---|---|
| Appearance | Colorless to light yellow transparent liquid | Visual clarity ensures optical-grade applications |
| Viscosity @ 25°C | 7,000–60,000 mPa·s | Grade-dependent (custom grades available) |
| Refractive Index (25°C) | 1.530 – 1.542 | High clarity for optical materials |
| Vinyl Content (if modified) | 5.0 – 5.9 wt% (optional) | Vinyl-modified versions available |
| Solid Content | 50 ± 2 wt% | Typically dissolved in xylene or toluene |
| Volatile Content (150°C/3h) | ≤ 1.0 wt% | Low VOC, suitable for sensitive applications |
| Phenyl Content | Adjustable (Standard ~45–55%) | Enhances heat and UV stability |
Key Applications
High-Temperature Resistant Coatings
Provides long-lasting performance on metals, glass, and ceramic substrates in industrial or automotive environments.LED Encapsulation & Optical Films
High refractive index and transparency make it suitable for encapsulating LEDs and producing optical-grade silicones.Silicone Pressure-Sensitive Adhesives (PSA)
Improves cohesive strength and thermal stability, especially when blended with polydimethylsiloxanes (PDMS).Release Liners
Enhances film formation and release performance in silicone-coated release papers and protective films.Electrical Insulation Coatings
High dielectric strength and low moisture absorption make it ideal for electrical potting, insulation, and protective varnishes.
Key Features & Advantages
✅ High Refractive Index (1.53–1.54) – Enhances optical clarity and brightness in transparent formulations.
✅ Thermal Stability (≥300°C) – Suitable for extreme environments and high-temperature curing.
✅ Excellent Film Hardness & Flexibility – Balances mechanical durability with adaptability to curved or elastic substrates.
✅ Superior UV & Weather Resistance – Phenyl functionality resists yellowing and oxidation under prolonged exposure.
✅ Good Compatibility – Mixes well with other silicone fluids, gums, and resins to tailor specific properties.
✅ Low VOC – Minimizes emissions in line with global environmental standards.
Recommended Silico® Grades
| Grade | Viscosity (25 °C) | Refractive Index | Vinyl Modified | Typical Use |
|---|---|---|---|---|
| Silico® MQP-72 | ~8,000 mPa·s | ~1.532 | No | High-temp coatings, PSAs |
| Silico® MQP-171 | ~18,000 mPa·s | ~1.538 | Yes (5.3 wt%) | Optical adhesives, LED encapsulation |
| Silico® MQP-451 | ~45,000 mPa·s | ~1.540 | Yes (5.6 wt%) | Electrical coatings, thick film systems |
- Customizations available for phenyl ratio, vinyl content, viscosity range, and solvent composition upon request.
Processing & Compatibility
Curing Methods: Compatible with platinum-catalyzed addition cure and peroxide crosslinking systems.
Solvent Compatibility: Fully soluble in aromatic hydrocarbons such as toluene and xylene.
Blend Recommendations: Ideal for use with hydroxyl-terminated or vinyl-functional silicones, phenyl fluids, and silicone rubbers.
Packaging & Storage
Packaging Options: 25 kg PE drums / 200 kg steel drums / 1000 kg IBC.
Shelf Life: 12 months in unopened containers under dry, cool conditions.
Storage Note: Keep away from heat, moisture, acids, alkalis, and catalysts.
Why Choose Silico®?
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