Meister Lackierer Practice Questions - Meisterprüfung Lackierer (Austria) Exam

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In 2K epoxy resin primers (2K-Epoxidharz-Grundierung) used for anti-corrosive protection on bare metals, what is the standard chemical reaction between the epoxy prepolymer (bisphenol-A diglycidyl ether) and the polyamidoamine hardener?

Condensation of ester bonds with zinc ions releasing volatile hydrochloric acid Oxidative drying where atmospheric oxygen crosslinks the aliphatic side chains via peroxides Nucleophilic ring-opening addition of the oxirane (epoxy) rings by active amine hydrogen atoms, forming beta-hydroxyamine crosslinks with high adhesion and barrier properties Cycloaddition of vinyl groups stimulated by ultraviolet radiation forming cyclobutane rings

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Nucleophilic ring-opening addition of the oxirane (epoxy) rings by active amine hydrogen atoms, forming beta-hydroxyamine crosslinks with high adhesion and barrier properties

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