FIELD: chemistry.
SUBSTANCE: invention relates to the preparation of curing agents for epoxy resins. Process for the preparation of microencapsulated epoxy resin curing agent involves mixing the active amine curing agent with the isocyanate component in a solution of ethyl acetate. In this case, a mixture of a condensation product of formaldehyde, phenol and an aliphatic amine and a more aliphatic amine more active with respect to isocyanate groups is used as the microencapsulated component, and as the encapsulating component – technical product – aromatic polyisocyanate, consisting of a mixture of phosgenating isomers of diaminodiphenylmethane admixed with tri- and tetraaromatic amines.
EFFECT: method provides rapid curing of the resins and simultaneously allows the production of epoxy compositions with high viability.
1 cl, 3 ex
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