Лако-красочные материалы — производство

Most frequently, for ambient curing systems, aliphatic or cycloa­liphatic polyamines or amine functional polymeric or oligomeric derivatives are the curing agents of choice. Epoxy groups can react with primary and secondary amine groups, respectively forming secondary and tertiary amine groups. The reactivity depends on type of amine. The general order of reactivity of amines is primary > secondary >> tertiary and aliphatic > cycloaliphatic > aromatic. These reactions are catalyzed by water, alcohols, tertiary amines, and weak acids (such as phenols). The generalized curing reaction of a two-component epoxy-amine system is depicted in Figure 2.44.