Process for the preparation of polymeric alpha, omega-dialdehydes and diacids
US5681903A · kind A · utility
1Cited by
18References
20Claims
0Family size
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Key dates
| Filing date | Dec 20, 1995 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Dec 20, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08C19/38
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the preparation of polymeric alpha,omega-dialdehydes, diacids and mixtures thereof, which process comprises reacting a corresponding polymeric aliphatic alkanediol with a stable free radical nitroxide in the presence of a NO.sub.x -generating compound, an oxidant and, optionally, a solvent and/or a bromide-containing compound, and thereafter separating out the polymeric alpha,omega-dialdehyde and/or diacid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.