Epoxy Chemistry

• Epoxy: O H H

C C H + H2N (C) N (C) NH2

H H H H

epoxide group + amines (DETA) epoxy

• Other epoxy resins

  • diglycidyl ether of bisphenol A (DGEBRA)
  • tetraglycidyl methylene dianiline (TGMDA
  • epoxy phenol cresol novolac
  • cycloaliphatic epoxies (CA)

• Curing agents (hardeners, catalysts, cross-linking agents)

  • aliphatic or aromatic amines (DETA, TETA, hexamethylene tetramine,etc.)
  • acid anhydrides (phthalic anhydride, pyromellitic dianhydride, etc.)

• Active hydrogen react with epoxide groups.

• As much as 15% hardener is needed

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