What are the advantages of silicone electronic potting adhesives compared with other potting adhesives? Advantage 1: It provides long - term protection for sensitive circuits or electronic components. For electronic modules and devices, regardless of their simple or complex structures and shapes, it can offer long - term and effective protection. Advantage 2: It has stable dielectric insulation properties and serves as an effective barrier against environmental pollution. After curing, it forms a soft elastomer that can eliminate the stress caused by impact and vibration within a wide range of temperature and humidity. Advantage 3: It can maintain its original physical and electrical properties in various working environments, resist degradation by ozone and ultraviolet light, and has good chemical stability. Advantage 4: It is easy to clean and remove after potting, facilitating the repair of electronic components. New potting adhesive can be re - injected into the repaired parts.

1. Polyurethane Potting Adhesive

Polyurethane potting adhesive, also known as PU potting adhesive, is mostly soft and elastic after curing and can be repaired, simply referred to as soft glue. Its adhesiveness is between that of epoxy and silicone. Its temperature resistance is average, generally not exceeding 100°C. There are relatively many bubbles after potting, and the potting must be carried out under vacuum conditions. Its adhesiveness is between that of epoxy and silicone. Advantages: It has good low - temperature resistance, and its shock - proof performance is the best among the three. It has characteristics such as low hardness, moderate strength, good elasticity, water resistance, mildew prevention, shock - proofing, and transparency. It has excellent electrical insulation and flame - retardant properties, is non - corrosive to electrical components, and has good adhesiveness to metals such as steel, aluminum, copper, and tin, as well as to materials such as rubber, plastic, and wood. Disadvantages: Its high - temperature resistance is poor. After curing, the surface of the colloid is not smooth, and its toughness is poor. Its anti - aging and anti - ultraviolet abilities are weak, and the colloid is prone to discoloration. (However, for flexible lighting products, modified polyurethane is the best choice as it has excellent toughness and better yellowing resistance than silicone and epoxy.) Scope of Application: It is suitable for potting indoor electrical components with low heat generation. It can protect the installed and debugged electronic components and circuits from the effects of vibration, corrosion, moisture, and dust. It is an ideal potting material for moisture - proof and anti - corrosion treatment of electronic and electrical parts.
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