Method for preparing polyhydroxycarboxylic acid resin
US5734007A · kind A · utility
0Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1996 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Jul 2, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is provided a method for easily preparing a polyhydroxycarboxylic acid resin in a one pot reaction by adding 1,3-substituted-1,1,3,3-tetraorganodistanoxan as a polymerization catalyst to a hydroxycarboxylic acid, such as L-lactic acid containing 10 to 50% of water as a starting material, and stirring while heating under a reduced pressure condition or in an organic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.