Acrylic photopolymer resins are widely used in stereolithographic
3D printing. However, the growing demand for such thermosetting resins
is weighing on global issues such as waste management and fossil fuel
consumption. Therefore, there is an increasing demand for reactive
components that are biobased and enable recyclability of the resulting
thermoset products. In this work, the synthesis of a photo-cross-linkable
molecule containing dynamic imine bonds based on biobased vanillin
and dimer fatty diamine is described. Using the biobased building
blocks, formulations containing reactive diluent and a photoinitiator
were prepared. The mixtures could be rapidly cross-linked under UV
light, yielding vitrimers. Using digital light processing, 3D-printed
parts were prepared, which were rigid, thermally stable, and reprocessed
within 5 min at elevated temperature and pressure. The addition of
a building block containing a higher concentration of imine bonds
accelerated the stress relaxation and improved the mechanical rigidity
of the vitrimers. This work will contribute to the development of
biobased and recyclable 3D-printed resins to facilitate the transition
to a circular economy.