Hindered piperidine carboxylic acids, metals salts thereof and stabilized compositions
US4031095A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Jun 30, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/94
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds having the formula ##STR1## WHEREIN R.sub.1 and R.sub.2 are lower alkyl or cycloalkyl, PA1 R.sub.3 is hydrogen, alkyl, methoxyethyl, alkenyl, propargyl, benzyl or alkyl substituted benzyl, PA1 R.sub.4 is alkylene of 1 to 4 carbon atoms substituted with alkyl of 1 to 18 carbon atoms or alkenyl of 2 to 18 carbon atoms, alkenylene of 1 to 4 carbon atoms, cycloalkylene, cycloalkenylene, bicycloalkylene, bicycloalkenylene, or phenyllene, PA1 M is hydrogen or a metal, and PA1 z has a value of from 1 to 4, Are good light stabilizers. The carboxylic acids are prepared for example, from 2,2,6,6-tetramethylpiperidin-4-ol and cyclohexane-1,2-dicarboxylic anhydride to give (0-mono (2,2,6,6-tetramethylpiperidin-4-ol)cyclohexane(1,2-dicarboxylate. 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.