Hardener for water-based epoxy resin, e.g. floor coating material, obtained by reacting epoxides and phenolic compounds together, reacting with polyamine and then with unsaturated carbonyl compound or nitrile

摘要

Hardeners (H) for water-based epoxy resins, obtained by reacting (A) epoxidised polyalkylene oxide(s) (polyethylene, polypropylene or polyethylene-propylene oxide), (B) epoxidised phenol(s) (Bisphenol A or F epoxide) and (C) phenolic compound(s) (Bisphenol A or F), reacting the resulting intermediate (Z1) with a polyamine (E) to form a second intermediate (Z2) and then reacting Z2 with alpha ,beta -unsaturated carbonyl compound(s) or nitrile(s) (F) so that 1-99% of the prim. amino groups in Z2 undergo reaction. Independent claims are included for (1) hardeners (H) obtained by the method described above, except that the reactants in the first stage comprise (A), (B) and (C) plus compound(s) (D) selected from triglycidyl ethers of triols and diglycidyl ethers of diols (2) a method for the production of clearcoats, coating materials and the like by reacting (H) in aqueous media with epoxide compounds (3) hardened materials obtained by this method .