| Abstract: | A new CH-acidic enamine crosslinking system is described. These crosslinking resins are prepared by the reaction of acetoacetate polymers with amines to increase the CH acidity; thus it is possible to cure ,β-unsaturated resins via Michael addition at room temperature, even without strong base catalysis. Furthermore, the high reactivity of the crosslinkers allows curing in water as the solvent. Extensive curing studies via IR spectroscopy are described to investigate shelflife, and the dependence the enamine/ketimine equilibrium on curing speed, which is influenced by the polarity of the solvents. Although the enamine function can be hydrolyzed in acidic media, the crosslinked films are resistant to a multitude of both organic and inorganic compounds. |
