Bicyclic hindered amino acids, metal salts thereof and stabilized compositions
AssigneeCiba-Geigy Corporation
InventorsChester E. Ramey, John J. Luzzi
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Abstract
Compounds having the formula ##STR1## wherein R is alkylene, M is hydrogen or a metal, and m has a value of from 1 to 4, Are good light stabilizers. The amino acids may be formed, for example, from 1,3,3-trimethyl-3-azabicyclo[2.2.2]octane-5-ol and sebacic acid to give o-mono(1,3,3-trimethyl-2-azabicyclo[2.2.2]octane-5-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.
Claims14
A composition of matter stabilized against ultraviolet deterioration which comprises a synthetic organic polymer normally subject to ultraviolet deterioration containing from 0.005 to 5% of a stabilizing compound of the formula ##STR7## wherein R is straight- or branched-chain alkylene having 1 to 20 carbon atoms,
- M is hydrogen or a metal selected from the group consisting of barium, nickel, manganese, calcium, zinc, iron, sodium, cobalt, tin, and dialkyl tin, and
- m has a value of from 1 to 4, the value of m being the same as the available valence of M.
Dependencies are inferred from the claim text.