Preparation of methylenedi (phenylurethane)
US5068391A · kind A · utility
0Cited by
8References
14Claims
0Family size
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Key dates
| Filing date | Jun 29, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Jun 29, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C271/28
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The bis-(N-carboalkoxyanilino)methanes, optionally in the presence of at least one alkyl N-phenylcarbamate, are selectively rearranged into methylenedi(phenylurethane), MDU, in the presence of an effective amount of hydrofluoric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.