Preparation Of Organic Silicone Adhesive

- Mar 22, 2019-

The organic silicone adhesive can be divided into two types: silicone resin as the binder and silicone rubber as the binder. The chemical structure of the two is structured. Many people ask if the silicone adhesive is toxic? Rest assured, it is non-toxic. Organic silicone adhesives are characterized by high and low temperature resistance, corrosion resistance and radiation resistance. At the same time, it has excellent electrical insulation, water resistance and weather resistance. It can bond metals, plastics, rubber glass, ceramics, etc. The market of organic silicone adhesives is also quite extensive, mainly used in space navigation, aircraft manufacturing, electronics industry, machinery. Bonding and sealing in processing, automotive manufacturing, and construction and medical.

The silicone adhesive formulation was prepared by adding 30 parts of the obtained silicone resin to a four-neck glass reactor equipped with a condenser, a stirrer, an addition funnel and a thermometer. After heating to 50~C under constant stirring, add 30 parts of E-42 epoxy resin adhesive and 30 parts of xylene solution, 7.5 parts of polyvinyl butyral solution, stir constantly, and the temperature Controlled at 50 ~ 60 ~ C, reaction for 60min, to obtain a light brown transparent viscous liquid, add 2.5 parts of curing agent dicyandiamide when cooling to room temperature, stir evenly, that is, get silicone modified epoxy resin adhesive. N-Ethylacetamide NEA CAS 625-50-3 is produced

Epoxy resin has good adhesion to a variety of materials, high bonding strength, wide bonding surface, curing mainly depends on open-loop addition polymerization, does not produce small molecular substances, low shrinkage, good storage stability, flexible formulation It can be cured at room temperature with an amine curing agent, and is easy to operate. It is an adhesive widely used at present. However, after curing, the crosslink density is high, the internal stress is large, the brittleness is large, the impact resistance is poor, and the use temperature generally does not exceed 150 ° C, so its application is limited. High temperature resistant epoxy resin adhesive, silicone has low temperature flexibility, high temperature and heat oxidation stability, low surface energy, electrical insulation, etc. It is used to modify epoxy resin to reduce epoxy internal stress and improve epoxy. An effective technical approach to resin toughness and high temperature resistance....