Piperidyl esters of higher di-tri-, and polybasic aliphatic carboxylic acids as stabilizers for polymeric materials
AssigneeCiba-Geigy Corporation
InventorsChester E. Ramey, John J. Luzzi
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Abstract
Piperidyl esters of the formula ##STR1## wherein R.sub.1 is hydrogen or lower alkyl, R.sub.2 is hydrogen, oxyl alkyl, alkenyl, alkinyl, alkoxy-alkyl, aralkyl or lower acyl and n is 2 or 3, and when n is 2, R.sub.3 is a diacyl of 36 carbons and when n is 3, R.sub.3 is a triacyl of 37 to 54 carbons. These compounds are useful as light stabilizers of polymeric materials.
Claims16
A piperidyl ester having the formula ##STR5## wherein R.sub.1 is hydrogen or a lower alkyl group of 1 to 5 carbon atoms, R.sub.2 is hydrogen, oxyl, alkyl having 1-12 carbon atoms, alkoxyalkyl of 2 to 21 carbons, alkenyl of 3 to 6 carbons, alkinyl of 3 to 6 carbons benzyl or benzyl substituted by alkyl groups of 1 to 4 carbons, or acyl derived from a saturated or unsaturated aliphatic acid of 1 to 4 carbons or aliphatic, cycloaliphatic or aromatic carbamic acid of the formula --CO--NH--R or aliphatic, cycloaliphatic or aromatic carbonic acid half ester of the formula --COOR wherein R is alkyl of 1 to 6 carbons,
- n is an integer of 2 or 3;
- when n = 2, R.sub.3 is a diacyl group derived from a straight or branched chain aliphatic or alicyclic, saturated or unsaturated carboxylic acid, having 36 carbon atoms
- when n is 3, R.sub.3 is a tri-acyl group derived from a straight or branched chain aliphatic or alicyclic saturated or unsaturated carboxylic acid having from 37 to 54 carbon atoms.
Dependencies are inferred from the claim text.