Preparation of flame-resistant halogenated imides
US5137948A · kind A · utility
5Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1988 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Jul 22, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3417
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to the preparation of halogenated imides derived from hydrazine and halogenated dicarboxylic acid anhydride and which can be used as flameproofing agents for plastics. The condensation of hydrazine and halogenated dicarboxylic acid anhydride is carried out in an aqueous medium, at a temperature ranging from 40.degree. to 225.degree. C., with a molar ratio of anhydride/hydrazine equal to between 0.5 and 3, preferably between 1 and 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.