| abstract |
Crosslinkable composition comprising a. a component A with at least 2 C-H acidic protons in activated methine or methylene groups (the RMA donor group 5), and b. a component B with at least 2 activated unsaturated groups (the RMA acceptor group), and c. a catalyst system C that contains, or can generate a basic catalyst that can activate the RMA reaction between components A and B, d. characterized in that the crosslinkable composition further comprises a component D containing XH groups which is also a donor of the addition of Michael that can react with component B under the action of catalyst C, in which X is N, P, O, S or in which X is C as part of an acidic methyl group (CH3), in which component A is malonate or acetoacetate and in which group XH of component D has greater acidity than CH groups in component A, characterized in that component D has a pKa (defined in an aqueous environment) of at least one unit smaller than that of the CH groups in component A. |