N-Substituted aspartic acid derivatives as curing agents for epoxide resins
US4284755A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1980 |
| Grant date | Aug 18, 1981 |
| Priority date | — |
| Expiry date | Apr 30, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G59/52
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
N-Substituted aspartic acid monoesters of the formula ##STR1## wherein for example R.sub.1 is an alkyl group having 1 to 12 C atoms, a cyclohexyl, phenyl, tolyl or benzyl group, R.sub.2 is an alkyl group having 3 or 4 C atoms, or a cyclohexyl, phenyl, tolyl or methoxyphenyl group, and x is 2 or 3, are obtained by adding, by means of an addition reaction, to 1 mol of a maleic acid monoester of the formula ##STR2## 1 mol of an amine of the formula EQU H.sub.2 N--(CH.sub.2 ).sub.x NH--R.sub.2 in the presence of a tertiary amine. The novel N-substituted aspartic acid monoesters are valuable curing agents for epoxide resins, and are particularly suitable for producing storage-stable B-stage resins.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.