Patent ID: 9221959
Filing Date: 2015-12-29
Classification: C08G,C08K,C08L,C09D,C09J

Abstract:
1. A curing agent for epoxy resins comprising: (a) a first amine adduct, which is a reaction product of an amine-terminated intermediate and a monofunctional epoxy compound, wherein the amine-terminated intermediate is prepared by reacting at least one polyamine or polyamidoamine, having at least 3 active amine hydrogen atoms per molecule, and at least one epoxy resin having a functionality of at least 1.5, in a mole ratio of 0.9:1 to 1:10 of an epoxy functionality equivalents to polyamine or polyamidoamine, wherein the excess of the polyamine or polyamidoamine being eliminated, and wherein the monofunctional epoxy compound is present in an amount calculated to react away the primary amines still present in the amine-terminated intermediate, (b) an optional second amine adduct which is prepared from a cycloaliphatic alkyl amine or polyamine and an epoxy compound, (c) a sterically hindered hydrophobic alkyl amine or diamine, a hydrophobic hydrocarbon resin, or both, (d) a component having amino or polyamino polyalkyleneglycol moieties a medium to low molecular weight amino silane, or both, and (e) an optional metal powder.