Biodegradable polyester polymer and method for preparing the same using compressed gas
US6913826B2 · kind B2 · utility
8Cited by
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20Claims
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Key dates
| Filing date | Oct 8, 2003 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Jan 9, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In polymerizing biodegradable polymer material, a compressed gas is used as a reaction solvent for a solution-polymerization, in order to prepare biodegradable polyester homopolymer and copolymer with a high molecular weight in a fine powder form with a particle size of 0.01˜1000 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.