Preparation of polylactic acid and copolymers of lactic acids
US4797468A · kind A · utility
134Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 1987 |
| Grant date | Jan 10, 1989 |
| Priority date | — |
| Expiry date | Dec 10, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D319/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a method for preparing high molecular polylactic acid or copolymers of lactic acids using lactide that is purified by extraction with water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.