Additive manufacturing of aromatic thermoplastics from photocurable precursor salts
US12018127B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Feb 13, 2019 |
| Grant date | Jun 25, 2024 |
| Priority date | — |
| Expiry date | Sep 26, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0002
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In various aspects, a polymer resin is provided for vat 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.