Vinyl terminated methylphenyl silicone oil

Vinyl-terminated methylphenyl silicone oil refers to a silicone oil having a vinyl group at its end group and a methyl atom and a phenyl group attached to silicon atoms in the main chain. According to the type of phenyl, it can be divided into methylphenyl chain type, diphenyl chain type and mixed type (contains two phenyl chains at the same time)

Section). Phenyl hydrogen-containing silicone oil is divided into hydrogen-terminated phenyl silicone oil and side hydrogen-containing phenyl silicone oil. The two have different uses. The former is mainly used as a diluent or chain extender when it is added to the encapsulant, and the latter is mainly used as a concentrated crosslinking agent for the encapsulant, which functions as a crosslinking center. The phenyl hydrogen-containing silicone oil is prepared by a cationic polymerization method, and generally uses sulfuric acid. In order to reduce the process flow, acidic resins can also be used for catalytic polymerization, the step of neutralizing the catalyst is omitted, and the acidic resins are directly filtered, and the acidic resins can also be reused multiple times.

Vinyl-terminated methyl phenyl silicone oil and phenyl hydrogen-containing silicone oil are the basic raw materials for high-refractive index LED encapsulants. With the rapid development of the LED industry, the potential of the LED packaging industry is unlimited, and the demand for phenyl silicone oil is huge. In recent years, with the further improvement of domestic phenyl monomer and intermediate production technology, research on this type of product has made some progress, but there is still a certain gap compared with foreign products, and it is urgent to improve. At present, high refractive index LED packaging Both the rubber preparation technology and the market are monopolized by foreign organic silicon companies. The phenyl material is the key to development and is the focus of urgent research.