Light-curable compositions useful for forming composite materials

A light-curable composition useful for forming a composite material, wherein the light-curable composition comprises:

• a) a photoinitiator system comprising a combination of at least one ferrocene compound of formula (I) and at least one acylgermane compound of formula (II) or formula (III):
• wherein R1 is hydrogen or C1-C4 alkyl, each R1 group is the same or different, and one or more R1 groups are present in one or both cyclopentadienyl groups;
• wherein R2 is methyl or phenyl;
• wherein R3 is hydrogen or methoxy;
• b) at least one cyanoacrylate;
• c) at least 20% by weight, based on total weight of the light-curable composition, of carbon fibers;
• and
• d) at least one acid stabilizer compound selected from the group consisting of Lewis acids.

A composite material which is the cured reaction product of a light-curable composition comprised of:

• a) a photoinitiator system comprising at least one of i) a combination of at least one metallocene compound comprising a transition metal of Group VIII of the periodic table and aromatic electron system ligands and at least one photocleavable compound which generates an acyl radical when exposed to light or ii) a photocleavable metallocene compound comprising a transition metal of Group VIII of the periodic table and aromatic electron system ligands which generates an acyl radical when exposed to light;
• b) at least one cyanoacrylate;
• and
• c) at least 10% by weight, based on total weight of the light-curable composition, of at least one filler.