Optimized emulsion drying process for making micronized polyetherimide polymers
US9181395B2 · kind B2 · utility
5Cited by
2References
30Claims
0Family size
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Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Jun 29, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for making ultra-fine particles of a high performance polymer in a yield greater than 90%, which includes dissolving the high performance polymer in an organic solvent capable of dissolving the polymer to form a solution; emulsifying the solution by combining the solution with water and a surfactant to form an emulsion; transferring the emulsion into a receiving water containing a surfactant to remove the organic solvent and form a slurry; and recovering particles of less than 75 microns in diameter in a yield greater than 90%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.