Ciba-geigy Corporation

Dieter Trachsler

Friedrich Lohse

Roland Moser

Claude Jeannerat

Hardenable mixtures which contain a polyepoxide compound with, on average, more than one epoxide group in the molecule, and a hardener of the formula I ##STR1## The symbol n is an integer from 3 to 5. The methylene carbon atoms can be substituted by one or two methyl or ethyl groups. The hardenable mixtures can be used, for example, in the fields of the protection of surfaces or of adhesives technology.

Hardenable epoxide resin mixtures containing cyanolactams

A mixture for the preparation of novel crosslinked nitrogen-containing polyadducts, which comprises

Mixture containing N-cyanolactam for the preparation of

A mixture for the preparation of novel cross-linked nitrogen-containing polyadducts, which contains (a) a N-cyanolactam of the formula I or II ##STR1## and (b) a monomeric or oligomeric organic compound having not less than 2 C atoms and not less than 2 hydroxyl groups. The mixture, with or without addition of a monohydroxy compound, can be used as a casting resin or adhesive, or for the production of foams or coatings. The symbols in the formula are all as defined in claim 1.

Mixtures for the preparation of nitrogen-containing polyadducts

The invention provides a process for the production of N-cyanolactams of the formula I ##STR1## which process comprises reacting a compound of the formula II ##STR2## in the presence of an inorganic hydrogen halide acceptor, with cyanamide or with a salt thereof. The N-cyanolactams obtained by the process of the invention are valuable intermediates for the production of polyadducts, or they can be used as activators in polymerization reactions. The symbols in formulae (I) and (II) are as defined in claim 1.

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Kaiseraugst, Switzerland

Dieter Trachsler