Premix and process for producing a thermally expandable and curable epoxy-based mass

Two-component premix for producing a thermally expandable and curable epoxy-based composition comprising a component A and a component B, wherein component A B containing at least one Isocanat and the component at least one diol or polyol, and wherein additionally at least one of components A or B at least one epoxy prepolymer, at least one of components a or B a and B is a thermally activated blowing agent comprises a heat-activatable curing agent for epoxy prepolymers and at least one of the components; A method for producing a thermally expandable and curable epoxy-based composition, wherein the components A and B are mixed together at a temperature in the range of 20 to 100 ° C, the mixture is introduced into a mold and in the mold at a temperature in the range of can be pre-cure to a up to 40 ° C dimensionally stable mass 20 to 100 ° C; at 22 ° C dimensionally stable mass which is obtainable by this process; Process for reinforcement and / or insulation of a component, which comprises applying such a composition to the component or introduced into the component and foaming at a temperature in the range of 120-220 ° C and hardens.