Polymer matrices prepared by supercritical fluid processing techniques
US6521258B1 · kind B1 · utility
47Cited by
13References
23Claims
0Family size
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Key dates
| Filing date | Sep 8, 2000 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Sep 8, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Polymer matrices for use in orthopedic, pharmaceutical, and similar mixtures are prepared by mixing two or more polymers and a process medium in a reactor to form a supercritical fluid slurry. The process medium preferably is carbon dioxide which is supplied to the reactor in a supercritical state or which is heated and pressurized in the reactor to attain a supercritical state. After mixing for a period of time, the slurry either is left in the reactor or is discharged into a receiving vessel. The process medium is separated from the polymers and removed, leaving behind finely divided particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.