Mixing and flow properties of thermally conductive epoxyJanuary 07, 2020
Master Bond EP39MAOHT is a two-component, thermally conductive, electrically insulative epoxy for bonding, sealing, coating, potting and encapsulation. Its low exotherm makes it well suited for large castings and potting applications. It withstands rigorous thermal cycling, vibration and shock. It also passes MIL-STD-810G for fungus resistance.
Master Bond EP39MAOHT is a room temperature curing system. It has a low mixed viscosity of 3,000–6,000 cps, a convenient one to one mix ratio by weight, and a long working life of 120–150 minutes for a 100 g batch. It is a versatile product that combines convenient handling, good flow, thermal conductivity, electrical insulation and high temperature resistance up to 400 F. This dimensionally stable system has very low shrinkage upon curing, and bonds well to a wide variety of substrates including metals, ceramics, composites and glass as well as many rubbers and plastics.
This formulation features reliable thermal conductivity of 9–10 BTU•in/ft2•hr•F while retaining superior electrical insulation properties, including a volume resistivity of >1014 ohm-cm and a dielectric constant of 4.8 at 60 Hz. It offers chemical resistance to water, fuels, hydraulic fluids, and several acids and bases. The combination of these performance properties makes it fitting for applications in the aerospace, electronic, electrical, optical and specialty OEM industries. Please watch the video to learn more.