Patent ID: 8563796

Claim:
Encapsulating composition for the storage or containment of waste that is toxic to the environment and/or health, wherein said encapsulating composition comprises 50 to 80% by weight of a resin composition based on epoxy resin and 20 to 50% by weight of a hardening composition comprising a hardener constituted by at least one amidoamine, said hardening composition being devoid of aromatic amine hardening agent and in that the hardening composition comprises a hardener constituted by at least one amidoamine chosen from the products of the reaction between one or more aliphatic polyethylene polyamine(s) and one or more C 12 -C 18 mono- or polyunsaturated fatty acid(s), and in that said epoxy resin has an aromaticity content of the order of 40 to 50% and in that said composition is devoid of any other water-absorbing substance, apart from the reactive components of the epoxy-amine system, wherein the resin composition comprises at least one additive which is a reactive diluent and is selected from the group consisting of p-tert-butylphenyl glycidyl ether, cresyl glycidyl ether, ethylhexyl glycidyl ether, trimethylolpropane triglycidyl ether and glycerol triglycidyl ether.