Design

Master Bond's new electrically isolating epoxy

17th November 2022
Beth Floyd

Master Bond EP5TC-80 is a thermally conductive, electrically insulating, one part epoxy system for bonding, sealing and small encapsulating applications. It meets NASA low outgassing requirements.

Master Bond EP5TC-80 is a one part, NASA low outgassing rated epoxy that achieves a thermal conductivity of 3.3-3.7 W/(m·K), while also retaining its electrical non-conductivity. It requires a cure at only 80°C for 1.5 to 2 hours. To optimise performance properties a post cure of 1-2 hours at 80°C is recommended. Featuring a thixotropic paste consistency, this compound adheres well to a variety of substrates such as metals, composites, glass, ceramics, and many plastics. It is formulated for bonding, sealing and small encapsulating applications.

EP5TC-80 is electrically insulating, with a volume resistivity greater than 1014 ohm-cm. It features a low thermal resistance of 6-10 x 10-6 K·m2/W and can be applied in very thin sections due to its ultra-fine particle filler. This high strength system has a tensile modulus exceeding 1.5 million psi, and a compressive strength ranging between 25,000 and 27,000 psi.

EP5TC-80 exhibits good dimensional stability with a low shrinkage upon cure, a Shore D hardness of 90-100, and an elongation of 0.5 to 1.5%. It is serviceable over the temperature range of -50°C to +150°C and has a glass transition temperature of 110-115°C. Packaging is available in 3cc, 5cc, 10cc and 30cc syringes and ships in dry ice.

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