Direct synthesis of zirconium containing phenyl silicone resin for LED encapsulation

Zirconium containing phenyl silicone resin were synthesized through hydrolysis among zirconium n-propoxide (ZP), diphenyldimethoxysilane, and 3-(trimethoxysily)propyl methacrylate under acidic conditions. The results indicated that the resins have favorable thermal stability for practical usage, and the thermal weightless of all resins are less than 3% under 200°C.The refractive index of the materials is positively correlated with zirconium content, and tunable between 1.57 and 1.59, and light transmittance does not change significantly with the increase of zirconium element. In addition, the resins can be stably stored for more than 6 months without any effect on the application.