Hindered piperidine ligands
US4377690A · kind A · utility
4Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1981 |
| Grant date | Mar 22, 1983 |
| Priority date | — |
| Expiry date | Jun 8, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0091
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel ligands of the general formula wherein r is 1 or 2, and L is a piperidine which is substituted by at least one enolate group in the 1-position or 4-position and wherein the ring nitrogen is sterically hindered by alkyl substituents in the adjacent positions. These ligands are useful in preparing light stabilizers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.