Production of polysuccinimide and polyaspartate in thioether solvents
US5939522A · kind A · utility
4Cited by
4References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Sep 5, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for the preparation of a desired molecular weight polysuccinimide by the catalytic polymerization of aspartic acid in the presence of a thioether solvent. Polysuccinimide of relatively high weight average molecular weight and high purity can be produced in relatively high yields while employing a relatively low catalyst loading and relatively low temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.