Application of vinyl silicone oil in potting of electronic appliances

After electronic products are manufactured, they often need to undergo a potting process to isolate them from the outside world. This can improve the earthquake resistance and waterproof performance of electronic products, prevent electronic components from being eroded by the natural environment, and extend the service life of electronic products. . There are many kinds of potting materials currently used for pouring into electronic components, and the most commonly used ones are: polyurethane materials, epoxy resin materials and silicone materials. Among them, the most commonly used potting glue is silicone material, which is widely used due to its various excellent properties.

Due to its special silicon-oxygen bond backbone structure, silicone polymer materials have unique weather resistance and aging resistance, excellent high and low temperature resistance, good hydrophobic mechanical properties, electrical insulation, etc., and are therefore widely used in electronic appliances. Potting protection of components.

Properties of silicone

1) It has excellent high and low temperature resistance. After curing, the silicone potting glue remains elastic even if it withstands thermal shock between -60℃~200℃.

2) It does not absorb or release heat during curing, does not shrink after curing, will not have any impact on electronic components, and has good bonding performance.

3) It has excellent electrical and insulation properties and is non-corrosive to materials.

4) Strong thermal conductivity, effectively improving the heat dissipation capacity of electronic products.

5) It can be cured at room temperature or heated, and is easy to operate. Common two-component addition-shaped silicone rubber potting glue: composed of vinyl-terminated silicone oil as the base glue, hydrogen-containing silicone oil as the cross-linking agent, and aluminum oxide (AI2O3) as the thermally conductive filler. Methacryloyloxypropyltrimethoxysilane (KH570) can be added as coupling agent and platinum catalyst (PL-2600) as catalyst.

 

Silicone gel material has become an indispensable sealing material in the field of electronic devices (such as LED displays, IGBT packaging, etc.) because of its excellent temperature resistance, waterproof, electrical insulation properties, colorless transparency, and resistance to yellowing.

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