Abstract: The effect of a novel latent accelerator, neodymium acetylacetonate(AD), on the properties of cured resin for bisphenol A epoxy resin(E-44)/Tung oil acid anhydride(TOA)systemis reported in this paper. Presence of AD decreased the gel time at 150℃ and increased theactivation energy with increasing amount of AD. The E-44/TOA/AD system displayed bet-ter storage stability at 40℃ than the control. The incorporation of AD into the epoxy resin caused an increase in the T_g values anddepressed the dielectric loss Tano at 130℃、155℃ of Nd ion-containin g epoxy. The mechanical properties were raised as compared with the control. It might be due to the specialelectron structure of rare-earth elements which makes the epoxy system having higher T_g owing to the higher crosslink density or more homogenoous network structure.

Key words: epoxy resin, latent accelerator, physical property