Patent ID: 7091255

Claim:
A multiphoton-activatable, photoreactive composition comprising (a) at least one reactive species that is capable of undergoing an acid- or radical-initiated chemical reaction other than a curing reaction; and (b) at least one multiphoton photoinitiator system comprising photochemically effective amounts of (1) at least one multiphoton photosensitizer that is capable of simultaneously absorbing at least two photons, (2) at least one electron donor compound that is different from said multiphoton photosensitizer, different from said reactive species, and capable of donating an electron to an electronic excited state of said photosensitizer, and (3) at least one photoinitiator that is capable of being photosensitized by accepting an electron from an electronic excited state of said photosensitizer, resulting in the formation of at least one free radical and/or acid; with the proviso that said composition contains no curable species.