Polyaspartic acid manufacture
US5315010A · kind A · utility
20Cited by
0References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1993 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Jun 21, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/528
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyaspartic acid having a weight average molecular weight of 1000 to 5000 is produced by hydrolysis of anhydropolyaspartic acid that has been produced by condensation polymerization of L-aspartic acid. Conversion in excess of 80 percent is achievable utilizing "temperature vs. time" profiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.