Producing semi-crystalline pulverulent polycarbonate and use thereof in additive manufacturing
US11365284B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2020 |
| Grant date | Jun 21, 2022 |
| Priority date | — |
| Expiry date | Jul 21, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2369/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Ways of preparing a partially crystalline polycarbonate powder are provided that include dissolving an amorphous polycarbonate in a polar aprotic solvent to form a first solution of solubilized polycarbonate at a first temperature. The first solution is then cooled to a second temperature, the second temperature being lower than the first temperature, where a portion of the solubilized polycarbonate precipitates from the first solution to form a second solution including the partially crystalline polycarbonate powder. Certain partially crystalline polycarbonate powders resulting from such methods are particularly useful in additive manufacturing processes, including powder bed fusion processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.