Hindered piperidine carboxamide acids, metal salts thereof, and stabilized compositions
US4001181A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1975 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Jul 30, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3435
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds having the formula ##STR1## WHEREIN R.sub.1 and R.sub.2 are lower alkyl or form a cycloalkyl ring, PA1 R.sub.3 is hydrogen, alkyl, .beta.-methoxyethyl, alkenyl, propargyl, benzyl or alkyl substituted benzyl, PA1 R.sub.4 is alkylene, alkyl-thio-alkyl or alkyl-oxo-alkyl, PA1 M is hydrogen or a metal, and PA1 z is an integer of from 1 to 4, are good stabilizers against actinic radiation. These compounds are prepared, for example, from 4-amino-2,2,6,6-tetramethylpiperidine and succinic anhydride to give N-(2,2,6,6-tetramethylpiperidyl-4)succinamic acid. 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.