128A+ Electronic Grade Liquid Epoxy Resin

The 128A+ Electronic Grade Liquid Epoxy Resin is a high-purity bisphenol A liquid resin formulated for precision electronic applications where ionic contamination control and long-term reliability are critical. Produced via an electronics-grade refining process, it achieves ultra-low levels of inorganic chloride, organic chloride, and sodium ions — well below standard industrial grades — effectively eliminating ionic migration risk in sensitive electronic assemblies.

Key electrical properties include a volume resistivity exceeding 1×10¹⁶ Ω·cm and a stable dielectric constant of 3.8–4.0, maintaining consistent insulation performance under high-temperature and high-humidity conditions. The resin exhibits moderate viscosity at 25°C with excellent flowability and degassing behavior, enabling vacuum casting and automated dispensing in precision manufacturing. Cured specimens demonstrate a shrinkage rate below 1.5%, ensuring dimensional accuracy and minimal residual stress — critical for high-precision electronic packages.

The product complies with IPC and UL electronic material standards and has demonstrated robust resistance to moisture-heat aging and thermal cycling. Recommended curing agents include modified aliphatic amines and anhydrides, with cure cycles adjustable from ambient temperature to 150°C.

Typical applications: encapsulation of semiconductors, ICs, and sensors; insulation bonding for 5G PCB boards and high-frequency copper-clad laminates; potting of automotive ECUs and EV battery management systems (BMS); insulation casting for high-voltage transformers and reactors.