Toughened One Part Epoxy Withstands Thermal Cycling
Master Bond EP17TF is a one part epoxy with a paste consistency, that can be readily dispensed evenly and uniformly. It has a moderately high glass transition temperature (Tg) of 150-155°C and a wide service temperature range from -150°F to +550°F. Designed to compensate for thermal mismatches, this compound resists impact, vibration, shock, and rigorous thermal cycling.
EP17TF is a reliable electrical insulator, possessing a volume resistivity greater than 1015 ohm-cm and a dielectric constant of 4.5 at 60 Hz at room temperature. It maintains its electrical insulation properties, even at higher temperatures. The system has good toughness, with an elongation of 5%-10%. EP17TF exhibits superior strength properties, bonding well to similar and dissimilar substrates such as metal, ceramics, plastics, and composites. It offers a high lap shear strength of 3,200-3,400psi, a tensile strength of 8,000-9,000psi, and a tensile modulus of 350,000-400,000psi at 75°F.
EP17TF requires an elevated temperature cure of 300°F for five to six hours, followed by a post cure at 350°F for four to five hours. The additional post cure is recommended to achieve optimal strength, chemical resistance, and thermal properties. EP17TF withstands many chemicals, including acids, bases, fuels, oils, and many solvents. It is available in standard packaging from ½ pint containers up to five gallon pails. Containers should be refrigerated to extend shelf life.
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