Polyaspartate (salt) by polymerizing aspartic acid and hydrolyzing
US5939518A · kind A · utility
2Cited by
4References
1Claims
0Family size
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Key dates
| Filing date | May 26, 1998 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | May 26, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1092
- 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 cyclic carbonate 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.