D.E.N. 438-MK75 is a general purpose, widely used epoxy novolac resin. It is recognized as a standardfor high temperature applications. D.E.N. 438 has multiepoxy functionality(±3.6). These additional reactive sites produce tightly cross-linked cured systems. D.E.N. 438-MK75 is used alone or in combination with bisphenol-A based epoxy resins in solution formulations where ease of mixing and processing is required. The thermal stability offered by epoxy novolac resins is a widely accepted asset in pre-preg manufacture for electrical laminates where they improve the resistance to hot solder as well as elevated temperature service. It isalso used in coating applications where an increased corrosion/chemical resistance is desired.
Solution of D.E.N. 438 in methyl iso-butyl ketone mainly for laminating or prepreg applications.