Advantages and disadvantages of potting compound

SILICONE POTTING

Advantages: the silicone potting adhesive is soft after curing, which can eliminate most of the mechanical stress and play a shock-absorbing and protective role. It has stable physical and chemical properties, good high and low temperature resistance, and can work for a long time in the range of - 50 ~ 200 ℃. Silicone potting has excellent weather resistance, can still play a good protective role in outdoor for more than 20 years, and is not easy to yellowing. Silicone adhesive has excellent electrical performance and insulation ability. After potting, it can effectively improve the insulation between internal components and lines, and improve the stability of electronic components. With the repair capability, the sealed components can be quickly and conveniently taken out for repair and replacement.

Disadvantages: bonding performance is not strong.

POLYURETHANE POTTING

Advantages: polyurethane potting adhesive has excellent low-temperature resistance, and the material is slightly soft. It has good adhesion to general potting materials. The adhesion is between epoxy resin and silicone, and it has good waterproof, moisture-proof and insulation properties.

Disadvantages; Poor high temperature resistance and easy to have bubbles, vacuuming must be adopted; After curing, the colloid surface is uneven, the toughness is poor, the anti-aging ability, anti-seismic and ultraviolet rays are weak, and the colloid is easy to change color