Hindered piperidine carboxylic acids, metal salts thereof and stabilized compositions
US4056507A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1975 |
| Grant date | Nov 1, 1977 |
| Priority date | — |
| Expiry date | Nov 19, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K15/30
- 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, PA0 R.sub.3 is hydrogen, alkyl, methoxyethyl, alkenyl, propargyl, benzyl or alkyl substituted benzyl, PA0 R.sub.4 is alkylene, alkyl-thio-alkyl or alkyl-oxo-alkyl, PA0 M is hydrogen or a metal, and PA0 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-tetramethyl-piperidin-4-ol and sebacic acid to give o-mono(2,2,6,6-tetramethyl-piperidin-4-ol)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.