Energy-induced dual curable compositions

Claim 1

An energy polymerizable composition comprising a) at least one ethylenically-unsaturated monomer, b) one of (1) polyurethane precursors, said polyurethane precursors comprising at least an additional monomer different from a) which is at least one monomer having at least two isocyanate groups and at least one monomer having at least two isocyanate-reactive hydrogen atoms, (2) at least one epoxy monomer different from the monomer in a), and c) a curing agent comprising (1) an organometallic compound, and (2) an onium salt selected from halonium compounds and cationic compounds of hypervalent Group VIA elements, said organometallic compound having the formula, L¹L²L³M wherein L¹   represents none, or 1 to 12 ligands contributing pi-electrons that can be the same or different ligand selected from substituted and unsubstituted acyclic and cyclic unsaturated compounds and groups and substituted and unsubstituted carbocyclic aromatic and heterocyclic aromatic compounds, each capable of contributing 2 to 24 pi-electrons to the valence shell of M; L²   represents none, or 1 to 24 ligands that can be the same or different contributing an even number of sigma-electrons selected from mono-, di-, and tridentate ligands, each donating 2, 4, or 6 sigma-electrons to the valence shell of M; L³   represents none, or 1 to 12 ligands that can be the same or different, each contributing no more than one sigma-electron each to the valence shell of each M; Ligands L¹, L², and L³   can be bridging or non-bridging ligands; M   represents 1 to 4 of the same or different metal atoms selected from the elements of Periodic Groups IVB, VB, VIB, VIIB, and VIII when polyurethane precursors are present, or from Periodic Groups VB, VIB, VIIB, and VIII when an epoxy monomer is present in the polymerizable composition; with the proviso that said organometallic compound contains at least one of a metal-metal sigma bond and L³, and with the proviso that L¹, L², L³, and M are chosen so as to achieve a stable configuration.