Production of isocyanates
US4145360A · kind A · utility
2Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1977 |
| Grant date | Mar 20, 1979 |
| Priority date | — |
| Expiry date | Mar 28, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/701
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the preparation of organic isocyanates in which a furoxan is heated in the presence of a vicinal diketo compound containing two adjacent keto carbonyl groups. When the furoxan ring is fused to an organic ring system di-isocyanates are produced. An adduct of the furoxan and the diketo compound may be isolated from the reaction mixture and used as a stable isocyanate precursor, for example, a "one-pot" polyurethane composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.