tetra com TTA520 (4,4' diaminodiphenylmethane tetraglycidylamine) is a multifunctional high temperature resistant special epoxy resin. Its structure is characterized by the non-glycidyl ether structure with polyphenyl ring and polycyclic oxygen group in the... moreTTA520 (4,4' diaminodiphenylmethane tetraglycidylamine) is a multifunctional high temperature resistant special epoxy resin. Its structure is characterized by the non-glycidyl ether structure with polyphenyl ring and polycyclic oxygen group in the molecule.