Development of polythiourethane based resins for 3D printing applications using photobase generators

[ENG] Recently additive manufacturing (AM) is gaining importance as new technologies for on demand applications are being developed. However, the variety of materials available for photopolymerization printing (VAT) is limited. Consequently, in this work photocurable resins based on polythiourethanes were studied with the aim of developing new materials for 3D printing applications by VAT photopolymerization. Different thiol-isocyanate systems were studied to find a system that can meet the requirements for the 3D printing applications. To this effect, various photobase generators (PBG) were investigated to achieve an on demand base catalyzed thiol-isocyanate reaction. Moreover, printing parameters were optimized to obtain high quality pieces demonstrating the use of the reported system as a competitive alternative for VAT 3D printing applications.[EUS] Azkenaldian fabrikazio gehigarria garrantzia hartzen ari da teknologia berriak garatzen ari diren heinean. Hala ere, fotopolimerizazio imprimaketa (VAT) prozesurako eskura dauden materialen aniztasuna mugatua da. Ondorioz, lan honetan politiouretanoak sintetizatu dira erretxina fotopolimerizagarri gisa, VAT fotopolimerizazio prozesuaren bidez 3D imprimaketa aplikaziorako material berriak garatzeko helburuarekin. Tiol-isozianato sistema desberdinak aztertu dira 3D imprimaketaren aplikaziorako baldintzak betzetzen dituen sistema aurkitzeko. Horretarako zenbait fotobase-sorgailu (PBG) ikertu dira base latentez katalizatutako tiol-isozianato erreakzio kontrolatua lortzeko. Hortaz gain, imprimaketa parametro desberdinak optimizatu dira kalitate handiko piezak lortuz, politiouretano sistemaren erabilera VAT fotopolimerizazio prozesu bidezko 3D imprimaketa aplikazioetarako frogatzeko