Simplified method of producing biodegradable aliphatic polyesters
US7253250B2 · kind B2 · utility
1Cited by
8References
17Claims
0Family size
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Key dates
| Filing date | Feb 17, 2005 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Feb 17, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of synthesizing biodegradable aliphatic polyesters from one or more aliphatic dicarboxylic acids or diesters of the said acids and one or more linear or branched aliphatic glycols, comprising a first esterification or transesterification step and a second deglycolation under vacuum step, in which the catalyst is monobutylstannoic acid both for the esterification or transesterification step and for the deglycolation under vacuum step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.