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Oct 12, 2024
The main components of pure silicone resin adhesive are methylphenyl silicone resin, zinc oxide, iron oxide, toluene, etc. It has excellent high temperature resistance, with the maximum operating temperature up to 400℃. It also has good water resistance and atmospheric aging resistance, but it is brittle and has low bonding strength. It is used for bonding metal, glass, pottery, and mica parts used at heat-resistant temperatures of 400-500℃. It can be used in the aerospace, rocket and atomic energy industries.
The main components of polyester modified silicone resin adhesive are polyester modified silicone resin, ethyl orthosilicate, organic tin, etc. Characteristics: The bonding process is simpler than that of pure silicone resin, and the bonding strength is higher than that of pure silicone resin, but its heat resistance is somewhat worse. It is used for bonding metal, ceramics and plastics at 200℃, and can be used in the motor and electrical appliance industries.
The silicone resin used to prepare adhesives is generally made of methyl chlorosilane, phenyl chlorosilane, etc., with a ratio of RI Si = 1.3 1.5, through hydrolysis and polycondensation under the action of alcohol, water and other media. In order to improve some properties of silicone resin, some other resins such as epoxy resin, polyester resin and phenol resin can be added for modification. One of the modification methods is blending modification, which is generally made of silicone resin. Resin mixed with other resins. The other is cocondensation modification, which is a condensation reaction between the tibia functional group in the low molecular resin and the tibia and alkoxy functional groups in the silicone resin or the monomers of the silicone resin and the monomers of other resins. Made by copolymerization.
The main components of epoxy resin modified silicone resin adhesive are silicone resin and epoxy resin reactants, epoxy resin curing agent, etc. The bonding process is simpler than that of pure silicone resin, and the bonding strength is higher than that of pure silicone resin, but its heat resistance is somewhat worse. It can be used for bonding metal, ceramics, silicone rubber, plastics and packaging of electronic devices at 200℃.