LIQUID, HYBRID UV/VIS RADIATION CURABLE RESIN COMPOSITIONS FOR ADDITIVE FABRICATION

摘要

Described herein are thermoset compositions suitable for hybrid polymerization when processed via additive fabrication equipment utilizing sources of actinic radiation with peak spectral intensities in the UV and/or visible region containing a photoinitiating package, a cationically curable constituent, a free-radically curable component, and optionally, one or more additives. Such thermoset compositions contain a Norrish Type I photoinitiator that is an alkyl-, aryl-, or acyl-substituted compound having a Group 14 atom, and/or possesses specified ranges of ionization potential values with respect to its known triplet state. Also disclosed are methods of creating three-dimensional parts via additive fabrication processes utilizing sources of actinic radiation with peak spectral intensities in the UV and/or visible regions employing the claimed thermosetting compositions, along with the parts cured therefrom.