Method of preparing polymer particles and polymer particles prepared thereby
US12371538B2 · kind B2 · utility
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13References
9Claims
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Key dates
| Filing date | Sep 14, 2020 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Apr 30, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2381/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Fine polymer particles are prepared by dissolving a polycarbonate, a poly(arylene ether), or a poly(arylene ether sulfone), each in a specific solvent, to form a slurry, heating the slurry to a temperature greater than the solvent boiling point to form a homogeneous solution, cooling the solution to form a dispersion of fine particles, and isolating the fine particles. A volume-based distribution of the isolated fine particles has a median equivalent spherical diameter less than or equal to 125 micrometers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.