3-Alkyl-4-oxo-imidazolidines and their 1-oxyls
US3971757A · kind A · utility
21Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1974 |
| Grant date | Jul 27, 1976 |
| Priority date | — |
| Expiry date | Jun 5, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K15/30
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2,2,5,5-Tetraalkyl- and 2,5-Dispiroalkylene-4-oxoimidazolidines which are substituted in 3-position by mono- to tetravalent radicals, are exellent light-stabilizers for organic polymers. They possess a higher compatibility with organic polymers than the corresponding imidazolines unsubstituted in 3-position, from which they may synthesized by reactions known for N-substitution. The preferred substituents in 3-position are alkyl, alkylene, alkenyl, aralkyl and esteralkyl groups. The 1-nitroxyls derived from the imidazolidines by oxidation with hydrogen peroxide or percarboxylic acids too are good light stabilizers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.