Process for the preparation of sterically hindered nitroxyl ethers
US8481726B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Jun 25, 2007 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Dec 27, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/94
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a novel process for the preparation of specific sterically hindered nitroxyl ethers from their corresponding sterically hindered nitroxyl radicals by reacting it with an aldehyde and a hydroperoxide. This nitroxyl ether formation may be carried out from different starting nitroxyl radicals, which are subsequently further reacted to the desired compounds. The compounds prepared by this process are effective as stabilizers for polymers against harmful effects of light, oxygen and/or heat and as flame-retardants for polymers.
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