D.E.N 438-MK75 Epoxy novolac 28064-14-4 Dow Chemical Epoxy Resins >> Phenol & Cresol (Novolacs) Marine /Anti-Corrosive / Protective >> Marine Marine /Anti-Corrosive / Protective >> Heavy duty (anti-corrosive) Coil Coating methyl isobutyl ketone D.E.N.* 438-MK75 epoxy novolac resin is a solution of a semi-solid reaction product of epichlorohydrin and phenol-formaldehyde novolac in methyl isobutyl ketone. D.E.N. 438 epoxy novolac resin is a general purpose, widely used epoxy novolac resin. It is recognized as a standard for high temperature applications from which variations have been developed. D.E.N. 438 has multiepoxy functionality (±3.6). These additional reactive sites produce tightly cross-linked cured systems. D.E.N. 438-MK75 epoxy novolac resin solution 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. They are also used in coating applications where an increased corrosion/ chemical resistance is desired. Coil Coatings Marine & Protective Coatings Standard semi-solid reaction product of epichlorohydrin and phenol-formaldehyde novolac in methyl isobutyl ketone. Used for high temperature applications such as coil, marine and protective coatings. Produces tightly crosslinked cured systems. Can be used alone or in combination with bisphenol-A based epoxy resins. Offers ease of mixing and processing, thermal stability and increased corrosion and chemical resistance.