Polyhydroxycarboxylic acid and preparation process thereof
US5310865A · kind A · utility
74Cited by
5References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Dec 18, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing polyhydroxycarboxylic acid by conducting a dehydration condensation of a hydroxycarboxylic acid or an oligomer thereof in a reaction mixture containing an organic solvent substantially in the absence of water and the polyhydroxycarboxylic acid thus obtained. The process provides polyhydroxycarboxylic acid having excellent properties and processability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.