Epoxy resin hardening agents from Mannich bases and method for curing
AssigneeSchering Corporation
InventorsUlrich Goeke, Michael Richter
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Abstract
Amine compounds, adaptable to use as a hardener for epoxy compounds, prepared by the reaction, with amine exchange and liberation of secondary amine, of a Mannich base and a member selected from the group consisting of aminoamides, aminoimidazolines, aminoamides containing an imidazoline group, and polyamines, said Mannich base being prepared by reacting formaldehyde, a monophenol or polyphenol, and a secondary amine are disclosed, as are a method of making epoxy polyadducts (i.e. cured epoxy resins) by the reaction of said amine hardener compounds with an epoxy compound and the epoxy polyadducts (i.e. cured epoxy resins) so prepared.
Claims17
The method of curing an epoxy resin to form a crosslinked duroplast product, which method comprises reacting an epoxy compound having an average of more than one epoxy group per molecule with a liquid amine compound having an average of more than two active amine hydrogen atoms per molecule, which liquid amine compound is prepared by the reaction, with amine exchange and liberation of secondary amine, of a Mannich base and an amount of a member selected from the group consisting of aminoamides, aminoimidazolines, aminoamides containing an imidazoline group, and polyamines such that the amine compound reaction product has an average of more than two active hydrogen atoms per molecule, said Mannich base being prepared by reacting formaldehyde, a monophenol or polyphenol, and a secondary amine.
Dependencies are inferred from the claim text.