公开(公告)号：US12252619B2

公开(公告)日：2025-03-18

申请号：US16981115

申请日：2019-03-30

Applicant: Virginia Tech Intellectual Properties, Inc.

Inventor： Daniel Rau ,  Jana Herzberger ,  Timothy Long ,  Christopher Williams

IPC: B33Y70/00 ,  C08G69/40 ,  C09D11/101 ,  C09D11/102 ,  C09D11/38 ,  B29C64/124 ,  B29K79/00 ,  B33Y10/00

Abstract: In various aspects, a polymer resin is provided for vat or ultraviolet-assisted direct ink writing (UV-DIW) photopolymerization. The resin can include a polyamic acid salt formed from the addition of a photocrosslinkable amine to a polyamic acid. The resin can include a photoinitiator suitable for initiating crosslinking of the photocrosslinkable amine when exposed to a light source of a suitable wavelength and intensity. The polyamic acid can be formed, for instance, by the addition of a diamine to a suitable dianhydride. Methods of additive manufacturing using the resins are also provided.