Condensation products prepared from cyclic carboxylic anhydrides of
dicarboxylic acids, tricarboxylic anhydrides or tetracarboxylic anhydrides and
difunctional polyamines, in particular polyoxyalkyleneamines, are suitable as a
builder component for epoxy resin compositions. The reaction products based on
tricarboxylic anhydrides or tetracarboxylic anhydrides are distinguished by having
on average more than one imide group and carboxyl group per molecule. The compositions
may optionally also contain condensation products obtained from tri- or poly-functional
polyols and/or tri- or poly-functional amino-terminated polymers and cyclic carboxylic
anhydrides, wherein the latter reaction products contain on average more than one
carboxyl group per molecule. These compositions additionally contain conventional
rubber-modified epoxy resins together with liquid and/or solid polyepoxy resins
and conventional hardeners and accelerators and optionally fillers and rheology
auxiliaries. Such compositions are particularly suitable as impact-resistant, impact/peel-resistant
and peel-resistant adhesives in vehicle construction and in electronics. Particularly
at very low temperatures, these adhesives exhibit very good impact and peel properties
combined with very good corrosion resistance and ageing resistance of the adhesive bond.
