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Home » Product » Silicone Resins » Methyl Silicone Resin
Methyl Hydride Silicone Resin
Methyl Hydride Silicone Resin is a silicone resin with M and Q units and reactive Si–H groups. It provides thermal stability, clarity, and high reactivity, making it ideal for LED encapsulants, optical adhesives, LSR reinforcement, and electronic potting.
Product Overview
Methyl Hydride Silicone Resin, also known as Methyl Hydrogen MQ Silicone Resin, is a specialty organosilicon compound composed of monofunctional trimethylsiloxy (M) units and tetrafunctional siloxane (Q) units, with reactive Si–H groups in the molecular backbone. This resin is widely used as a crosslinking agent, reinforcing additive, and release control component in advanced silicone systems. It offers excellent thermal stability, optical clarity, and reactivity in hydrosilylation reactions, making it ideal for use in high-performance applications such as LED encapsulants, optical adhesives, LSR reinforcement, and electronic potting materials.
Key Properties
| Property | Typical Value |
|---|---|
| Appearance | Clear, colorless liquid |
| Viscosity (25 °C) | 30–300 mm²/s (model-dependent) |
| Active Si–H content | 0.45–0.75 wt% |
| Refractive Index | Approx. 1.410 |
| Volatile Content (150 °C, 2h) | <3% |
| M/Q Ratio | 0.6–1.0 |
| Molecular Weight | 2,000–8,000 g/mol |
Performance Advantages
✅ Excellent Crosslinking Reactivity
High Si–H content allows efficient hydrosilylation curing with vinyl-functional silicones under platinum catalysis, supporting fast and complete curing.✅ Mechanical Enhancement
Improves the hardness, tensile strength, and tear resistance of silicone rubbers and gels, particularly in addition-cure RTV/HTV systems.✅ High Optical Transparency
Low haze and high light transmittance make it suitable for LED encapsulation, optical lens bonding, and transparent sealing.✅ Outstanding Thermal & UV Stability
The MQ resin structure ensures excellent thermal resistance (up to 250–300 °C) and resistance to UV degradation and oxidation.✅ Low VOC & Safe Formulation
Exhibits minimal volatile organic compounds (VOCs), making it safer to handle and ideal for low-emission silicone formulations.
Main Applications
LED & Optical Materials:
Used in LED potting compounds, lens adhesives, and high-refractive-index optical encapsulants due to its clarity and heat stability.Liquid Silicone Rubber (LSR) Reinforcement:
Enhances strength and elongation in addition-cured RTV/LSR systems, especially in medical-grade and electronic silicone compounds.High-Performance Coatings & Release Agents:
Functions as a crosslinker or film-forming additive in non-stick coatings, anti-fouling paints, and thermosetting resins.Electronic Potting & Encapsulation:
Provides electrical insulation, thermal resistance, and dimensional stability in encapsulation materials for PCBs, sensors, and modules.
Recommended Silico® Grades
| Product Code | Si–H Content (wt% / mmol/g) | Refractive Index (25°C) | Remarks |
|---|---|---|---|
| SI-MHQ-4 | Approx. 0.45 wt% | 1.410 ± 0.002 | Used as optical silicone enhancer for LED encapsulants; medium Si–H content for balanced crosslinking. |
| SI-MHQ-8 | Approx. 0.75 wt% | 1.410 ± 0.002 | Low-viscosity grade suitable for transparent silicone preparations and liquid silicone adhesives. |
| SI-GP-236 | Approx. 45.2 wt% Si–H | — | High Si–H content with free Si–H groups; ideal for crosslinking and moisture resistance applications. |
| SI-GP-535 | Approx. 43 wt% Si–H | — | Terminal hydroxyl-functional hydride silicone oil; widely used in chain extension reactions. |
| SI-MQH-8 | Approx. 8.0 mmol/g Si–H | — | Enhances hardness and tear strength in silicone rubber formulations. |
| SI-MQH-9 | Approx. 9.5 mmol/g Si–H | — | Provides superior tear strength enhancement. |
| SI-Phenyltris | Approx. 9.1 mmol/g Si–H | — | Accelerates crosslinking and improves physical properties. |
Packaging & Storage
Standard Packaging: 25 L PE drum; 50 kg and 200 kg containers available on request.
Shelf Life: 6 months in original unopened packaging.
Storage Conditions: Store in a cool, dry, and well-ventilated area. Keep sealed and protected from heat and direct sunlight.
Handling & Safety Instructions
Wear suitable protective gloves, goggles, and clothing during handling.
Avoid contact with skin and eyes. In case of accidental contact, rinse thoroughly with water.
Store away from nitrogen-, sulfur-, or phosphorus-containing compounds to prevent catalyst deactivation during formulation.
Refer to the Safety Data Sheet (SDS) for detailed safety and first-aid procedures.
Jessica G.
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