Polymer, production and use thereof
US4849228A · kind A · utility
75Cited by
10References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Nov 6, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J13/125
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention provides a biodegradable high molecular polymer characterized in that the content of water-soluble low molecular compounds, as calculated on the assumption that said compounds each is a monobasic acid, is less than 0.01 mole per 100 grams of said high molecular polymer. The thus-obtained high molecular polymer has good aging stability and can be used advantageously as an exipient for pharmaceutical preparations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.