Anhui IOTA’s IOTA 207 Methyl Phenyl Hydrogen Silicone Resin is a specialized crosslinking agent designed for high-refractive-index LED encapsulation gels and addition-cured high-temperature silicone rubber. Synthesized through a unique phenyl monomer process, this product features highly reactive Si-H bonds, significantly enhancing thermal resistance, optical performance, and mechanical strength. It is widely used in advanced electronic encapsulation and specialty rubber applications.

Key Advantages

✅ High Reactivity: Si-H content 0.27%-0.31%, enabling efficient low-temperature crosslinking with platinum catalysts
✅ Optical Clarity: Refractive index 1.54, ideal for high-refractive LED encapsulation (1.50-1.55 range)
✅ Thermal Stability: Solid content ≥96%, decomposition temperature >350°C, suitable for high-temperature silicone rubber
✅ Eco-Friendly & Safe: Non-hazardous for transport, solvent-free, compliant with RoHS/REACH

Technical Specifications

Applications

1. LED Encapsulation Gels

• Refractive Index Matching: Combined with phenyl silicone oil, achieves 1.54 RI, minimizing light loss

• Low Yellowing: Platinum-catalyzed addition reaction produces no byproducts, ensuring long-term clarity

2. High-Temperature Silicone Rubber

• Fast Curing: Vulcanizes in 10-30 minutes at 80-120°C

• Enhanced Heat Resistance: Enables short-term 300°C endurance (ASTM D638 tested)

3. Electronic Coatings

• Dielectric Protection: Used in PCB conformal coatings, volume resistivity >10¹⁵Ω·cm

Usage Guidelines

1. Recommended Ratios:

   • LED encapsulation: 3-8% addition

   • High-temp silicone rubber: 1-5% addition

2. Catalyst Conditions: 10-50ppm platinum catalyst, 80-150°C

3. Precautions:

   • Avoid direct mixing with OH/NCO-reactive substances

   • Store in cool, dry conditions to prevent moisture absorption