The present invention is drawn toward compositions, methods, and systems
for solid free-form fabrication of three-dimensional objects. In one
embodiment, a system for solid free-form fabrication of three-dimensional
objects can comprise a particulate composition, a substrate configured
for supporting at least a layer of the particulate composition in a
defined region, and a liquid phase binder configured for being jetted in
the defined region to polymerize at least a portion of the particulate
composition to form a polymeric cement. Using this system in a layer by
layer deposition process, three-dimensional objects can be formed. The
particulate composition can include from 70 wt % to 99.9 wt % of
polymeric particulates, and from 0.1 wt % to 10 wt % of a polymerization
initiator. The liquid phase binder can include from 70 wt % to 90 wt % of
polymerizable monomers and from 0.1 wt % to 10 wt % of a polymerization
accelerator.