Heat-curable mixtures, which are stable on storage, of epoxide compounds .beta.-aminocrotonic acid derivatives and polyamine

A heat-curable mixture which is stable on storage, which contains (a) an epoxide compound with, on average, more than one epoxide group in the molecule, (b) a .beta.-aminocrotonic acid derivative of the formula I to X ##STR37## in which R.sup.1 and R.sup.2 independently of one another are each a hydrogen atom, alkyl having 1 to 6 C atoms, cycloalkyl having 5 or 6 C atoms or aryl having 6 to 10 C atoms, Y is a n-valent organic radical having 2 to 30 C atoms, R is an aromatic or aliphatic radical having not more than 30 C atoms, E, together with the two N atoms, is a heterocyclic, five-membered or six-membered ring and n is a number from 1 to 3, and (c) a polyamine of the formula XI

• G--(NH.sub.2).sub.y (XI)
• in which the radical G is a y-valent organic radical having 2 to 40 C atoms and y is a number from 2 to 4;
• the curable mixture containing 2 to 8 epoxide equivalents per 1 equivalent of .beta.-aminocrotonic acid derivative, containing the grouping ##STR38## and a maximum of 70% of amino group equivalents, based on the sum of the equivalents of .beta.-aminocrotonic acid derivative and amino group.