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How to choose epoxy resin, silicone and polyurethane potting compound?

2025-09-09

Epoxy resin offers high hardness, excellent insulation properties, and strong adhesion, but suffers from poor toughness and weak resistance to thermal shock. Silicone demonstrates superior elasticity, temperature tolerance, aging resistance, and electrical performance, though it has relatively weaker adhesion and higher costs. Polyurethane provides good flexibility, flexural strength, and moderate adhesion, but performs poorly in damp heat and high-temperature environments. The optimal choice should be determined by comprehensively evaluating the product's application environment (temperature, humidity, stress), performance requirements (hardness, insulation, thermal conductivity), and cost considerations.