Diphenyldiethoxysilane CAS NO: 2553-19-7 QM-B22

Diphenyldiethoxysilane is a key monomer in the synthesis of high-performance organosilicon materials. Through hydrolysis and condensation polymerization, it can prepare silicone oil containing phenyl side groups, i.e., phenyl silicone oil. Compared to ordinary methyl silicone oil, phenyl silicone oil has a lower freezing point, a higher refractive index, and better radiation resistance and high/low temperature resistance. These properties make phenyl silicone oil widely used in high-temperature lubrication in the aerospace field, as an insulating medium in the electronics and electrical fields, and as a cosmetic additive in the daily chemical industry.

Furthermore, diphenyldiethoxysilane can also be used as a crosslinking agent and chain extender for silicone resins. During the preparation of silicone resins, it can copolymerize with other siloxane monomers to improve the heat resistance, hardness, and chemical corrosion resistance of the silicone resin. Modified silicone resins are often used to manufacture high-temperature coatings, insulating varnishes, and electronic packaging materials.

Due to the presence of hydrolyzable ethoxy groups and lipophilic phenyl groups in its molecule, diphenyldiethoxysilane can be used as a silane coupling agent. It can undergo hydrolysis and condensation reactions on the surfaces of inorganic materials such as glass, ceramics, and metal oxides to form a dense monomolecular organosilicon layer. This organosilicon layer contains both silicon-oxygen bonds that can firmly bond with the surface of inorganic materials and organic groups that can interact with organic resins. This improves the dispersibility of inorganic fillers in organic resins and significantly enhances the mechanical strength, water resistance, and electrical insulation properties of the composite material.

Technical Specifications: