With the rapid development of the LED industry, the demand for LED packaging materials is constantly increasing. LED organic silicon packaging adhesive has become a leader in the field of LED packaging materials due to its excellent physical and chemical properties. Phenyl silicone oil has become an important component of LED packaging adhesives. With the increase of phenyl mole fraction, the high temperature resistance, radiation resistance, and refractive index of organic silicon materials have been improved.

The phenyl silicone oil used for LED packaging mainly includes end vinyl methyl silicone oil and phenyl hydrogen silicone oil. According to the type of phenyl group, it can be divided into methyl phenyl chain node type, diphenyl chain node type, and mixed type (containing both types of phenyl chains). Phenyl hydrogen containing silicone oil is divided into terminal hydrogen phenyl silicone oil and side hydrogen containing phenyl silicone oil. The former is mainly used as a diluent or chain extender for packaging adhesive, while the latter is mainly used as a concentrated crosslinking agent for packaging adhesive. End vinyl methyl phenyl silicone oil and phenyl hydrogen containing silicone oil are the basic raw materials for producing high refractive index LED packaging adhesive.