Polyetherimide powders for additive manufacturing
US11352498B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Dec 22, 2017 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Nov 21, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2379/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Provided are amorphous and at least partially crystalline polyetherimide compositions having a comparatively narrow particle size distribution and are particularly suited for additive manufacturing processes. The compositions comprise a population of polyetherimide particulates are characterized as having a zero-shear viscosity sufficiently low so as to achieve a coalescence of at least 0.5, and preferably of about 1.0, as characterized by the Frenkel model at a temperature less than 450° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.