O-substituted N-hydroxy hindered amine stabilizers
US5204473A · kind A · utility
94Cited by
4References
36Claims
0Family size
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Key dates
| Filing date | May 12, 1992 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | May 12, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/34926
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Hindered amines based on various 2,2,6,6-tetraalkylated nitrogen-containing heterocyclic moieties wherein the hindered nitrogen atom on the ring is substituted with OR.sub.1 substituents and the 4-position of the ring is substituted with a variety of groups, are effective as light stabilizers in diverse substrate systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.