Polyaspartic acid manufacture
US5391764A · kind A · utility
8Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1994 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Mar 29, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K8/528
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyaspartic acid is produced by hydrolysis of anhydropolyaspartic acid that has been produced by thermal 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.