Epoxy-based substance for fixing purposes, the use thereof and the use of specific components

A composition for a curable substance for fixing purposes, comprising an epoxy component (a), which contains curable epoxides, and a hardener component (b), which comprises

• (i) a Mannich base formulation obtainable by reaction of one or more specific amines with phenols and aldehydes,
• the specific amines being those of the formula
• wherein
• “CYC” is a monocyclic saturated ring having from 3 to 12 ring atoms or a condensed dicyclic saturated ring system having from 6 to 12 ring atoms, wherein in each case the ring atoms are selected from 0 to 2 nitrogen atoms, 0 to 1 oxygen atoms and 0 to 1 sulfur atoms and from carbon atoms;
• X is CH2, wherein for each group —[X]n—NH2 one X can be NH, O or S, with the proviso that in the case of an X═O or S, in the group —[X]n—NH2 in question n is at least 2 and the O or S is not bonded directly to a nitrogen atom and in the case of one X═NH, n is at least 2 and the X═NH is bonded neither directly to a nitrogen ring atom nor to a nitrogen atom present in the group —[X]n—NH2 in question;
• n is from 0 to 5, with the proviso that at least in one of the groups —[X]n—NH2 n is from 1 to 5;
• and
• m is a whole positive number greater than or equal to 2, especially 2 to 3;
• or salts thereof,
• and/or
• (ii) mixtures of styrenated phenols with one or more low molecular weight amines, which are di- or poly-amines, or salts thereof.