Two component epoxy system has excellent thermal shock resistance

Master Bond EP110F8-3 is a two-part epoxy system perfect for sealing, potting, encapsulating, and casting applications. “This toughened system offers very good flexibility and maintains a relatively high elongation of 120-150%”, says Rohit Ramnath, senior product engineer. “It offers a low tensile modulus of around 5,000-15,000psi and a shore A hardness of 40-50 at room temperature.” The system offers exceptional thermal cycling and shock resistance, passing ten cycles from -55C to +125C with no signs of cracking. It has an excellent electrical insulation profile with a low dielectric constant of 2.67 and also a low dissipation factor of 0.006, both measured at 75F for 1KHz. The system has a convenient mix ratio of one to two by weight; the colour of Part A is clear while the colour of Part B is amber. It has a low mixed viscosity of 1,000-2,000cps and flows readily. Working life for a 100g batch is 2-3 days at room temperature and can be cured within a few hours at 250-300F.