Additive manufacturing of aromatic thermoplastics from photocurable precursor salts
US12252619B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Mar 30, 2019 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | Nov 21, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y10/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.