Product of mono or polyamine and polyepoxide-amine precursor, epoxy resin-amine adduct, monoepoxide-amine adduct and epoxide thinner

A curing agent for epoxy resins comprises:

• a) a reaction product of at least one polyalkylene polyether monoamine and/or polyamine having a molecular weight of from 148 to 5000 with a polyepoxide and, optionally, a monoepoxide, in a ratio of amine hydrogen, optionally remaining after reaction with the monoepoxide, and epoxide groups of the polyepoxide of from 1:1.4 to 1:6 to obtain an epoxide group-containing precursor, the precursor further reacted with a primary monoamine and/or a primary or secondary polyamine in at least a 10% molar excess relative to the epoxide groups of the precursor, the reaction product being substantially free of non-reacted amines;
• b) an amine-terminated adduct of an epoxy resin and a primary monoamine and/or a primary or secondary polyamine being substantially free of non-reacted amines;
• c) an amine-terminated adduct of an epoxide group-containing reactive thinning agent and a primary monoamine and/or a primary or secondary polyamine being substantially free of non-reacted amines and
• d) with up to 50 mol %, relative to the amino groups, of reactive thinning agents containing one or more epoxide groups per molecule.