Thermally conductive, electrically insulative epoxy serves medical devices

MASTER BOND EP40TCMed two part, room temperature curing epoxy system meets the requirements of ISO 10993-5 for non-cytotoxicity. Product is thermally conductive, electrically non-conductive and can be utilized as an adhesive or sealant in various medical and wearable device applications. The toughened epoxy delivers an elongation of 60-70%, and it has improved strength properties with a tensile lap shear strength between 2,300 and 2,500 psi, a T-peel strength of 40-60pli and a low tensile modulus of 5,000-15,000psi at room temperature, making it suitable for applications where low stress is needed. System’s small particle size filler allows for effective heat transfer when applied in thin layers, lowering its thermal resistance. It is also capable of withstanding exposure to EtO, radiation and several sterilants, as well as anti-microbial cleaning agents. Serviceable from -100°F to +300°F [-73°C to +149°C], EP40TCMed features reliable electrical insulation characteristics with a dielectric constant of 4.4 at 60 Hz and a volume resistivity greater than 10¹⁵ ohm-cm. Its thermal conductivity is 8-11 BTU•in/(ft²•hr•°F) [1.16-1.60 W/(m•K)].

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