| abstract |
A lightly-crosslinked thermosettable formulation comprises (a) a diepoxy resin, (b) an aromatic diamine of the structural formula <IMAGE> in which each R is a divalent linking moiety selected from C1-6 alkylene, -S- and -O-, and R' is ethyl, (c) an amine or phenolic crosslinking agent, and (d) 2,6-dialkyl aniline. The formulation exhibits relatively long outlife and can be used as the matrix resin in aerospace composites applications. |