Researchers use N- (trimethoxysilylpropyl) -4-azide-2,3,5,6-tetrafluorobenzamide to modify nano-sized zinc oxide and graft it onto the silicone polymer chain The grafting reaction changes the refractive index of the nanocomposite, and makes the refractive index of the ZnO nanoparticles and the silicone matrix more compatible, which improves the refractive index of the silicone polymer, and has great prospects for application in LED packaging materials. Zhan Xibing and others used a non-hydrolyzed sol-gel to prepare a series of transparent titanium hybrid silicone resins with a refractive index as high as 1.62. At the same time, the products obtained had good light transmission and thermal stability. Our company uses phenyltrimethoxysilane, methylphenyldiethoxysilane, methylvinyldimethoxysilane as raw materials, organic acids as catalysts, and synthesizes vinyl phenyl silicone resins. Phenyl silicone resin and hydrogen-containing silicone resin are cured. The hardness of Shore D is 55-75 D, the refractive index is greater than 1.53, and the light transmittance is greater than 99%. It is better for LED packaging materials.