Meat-curable mixture, which are stable on storage, of epoxide resin, 3-aminocrotonic acid derivatives and maleimide compound

Claim 1

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 β-amino-crotonic acid derivative of the formulae I to X ##STR37## in which R 1 and R 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 maleimide of the formula XIII ##STR38## in which A is a x-valent organic radical having 2 to 30 C atoms, Z is vinylene or methylvinylene and x is a number from 1 to 3; the curable mixture containing 2 to 8 epoxide equivalents per 1 equivalent of β-aminocrotonic acid derivative, containing the grouping ##STR39## and a maximum of 70% of imide group equivalents, based on the sum of equivalents of β-aminocrotonic acid derivative and imide group.