Production of high molecular weight polysuccinimide and high molecular weight polyaspartic acid from maleic anhydride and ammonia
US5219952A · kind A · utility
61Cited by
5References
10Claims
0Family size
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Key dates
| Filing date | Sep 18, 1992 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Sep 18, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1092
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of producing high molecular weight polysuccinimide and high molecular weight polyaspartic acid. Reacting maleic anhydride with ammonia and further reacting with polymerized polysuccinimide. Hydrolyzing the resultant product to form polyaspartic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.