Hindered piperidine carboxylic acids, metal salts thereof and stabilized compositions
US4116933A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1976 |
| Grant date | Sep 26, 1978 |
| Priority date | — |
| Expiry date | Jun 28, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/46
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds having the formula ##STR1## WHEREIN R.sub.1 and R.sub.2 are lower alkyl or together lower alkylene, PA1 R.sub.3 is hydrogen, alkyl, methoxyethyl, alkenyl, propargyl, benzyl, alkyl substituted benzyl, or acyl, PA1 R.sub.4 is alkylene, alkyl-thio-alkyl or alkyl-oxo-alkyl, PA1 M is hydrogen or a metal, and PA1 z has a value of from 1 to 4, and either (a) R.sub.5 is alkyl of 1 to 6 carbon atoms, R.sub.6 is alkyl of 1 to 6 carbon atoms, and R.sub.7 and R.sub.8 are independently hydrogen or alkyl of 1 to 5 carbon atoms, provided that R.sub.7 and R.sub.8 are not both hydrogen, or PA1 (b) R.sub.5 and R.sub.6 are together lower alkylene and R.sub.7 and R.sub.8 are independently hydrogen or alkyl of 1 to 5 carbon atoms, Are good light stabilizers. The carboxylic acids are prepared for example, from 2,3,6-trimethyl-2,6-diethylpiperidin-4-ol and sebacic acid to give 2,3,6-trimethyl-2,6-diethyl-4-piperidyl hydrogen sebacate. The metal salts of the acids are readily prepared by reacting the acids or their salts with a reactive form of the metal or metal complex.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.