NPPN-638S has two advantageous properties，heat resistively of phenolic backbone and reactivity of an epoxy.Comparing with BPA-based epoxides which have two epoxides per molecule，NPPN-638S has an average of 3.6 epoxy groups per molecule.
NPPN-638S provides tightly cross-linked cured systems having better
elevated temperature performance，chemical resistance and adhesion than the BPA-based resins.