Metal salts of hindered piperidine carboxylic acids and stabilized compositions
US3939163A · kind A · utility
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4References
10Claims
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Key dates
| Filing date | Dec 28, 1973 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Dec 28, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K15/30
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds having the formula ##EQU1## 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 lower alkylene, PA1 M is a metal, and PA1 z has a value of from 1 to 4, And good light stabilizers. The carboxylic acids are prepared, for example, from 2,2,6,6-tetramethyl-piperidin-4-ol and succinic acid to give o-mono(2,2,6,6-tetramethyl-piperidin-4-ol)succinate. 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.