LED silicone packaging adhesive is a new type of high-end liquid silicone and also a kind of optical packaging. It can maintain high transparency in the visible light region, has a high absorption rate of ultraviolet light, and can improve the light output rate and service life of lighting devices.

In recent years, due to the rapid development of the LED industry, the demand for LED packaging materials has increased. LED silicone packaging adhesive has become the leader in LED packaging materials due to its excellent physical and chemical properties. With the aggravation of the energy crisis, the LED industry will continue to grow. Therefore, the market potential of LED packaging materials is huge. High-power LED packaging materials require their raw materials to have high transmittance and refractive index. Phenyl silicone oil has become an important component of LED packaging materials. With the increase of phenyl mole fraction, the high temperature resistance, radiation resistance and refractive index of organic silicon materials have been improved, and the importance of phenyl silicone oil for LED packaging adhesive has increased day by day.

Phenyl silicone oil for LED packaging mainly includes vinyl terminated methyl phenyl silicone oil and phenyl hydrogen-containing silicone oil. Phenyl silicone oil can be further divided into: low phenyl silicone oil (phenyl mole fraction 5% - 10%) according to phenyl content; Medium phenyl silicone oil (phenyl mole fraction 25%); High phenyl silicone oil (phenyl mole fraction 45%). Different LED packaging adhesives have different requirements for phenyl content. High-power LED packaging adhesives generally require higher phenyl content in order to achieve high refractive index and reduce the loss of light source energy.