- Piperidine derivatives
-
Compounds of formula (I): wherein:, R represents H or a mono- or poly- carboxylic acyl group;, R1 represents H or a carboxylic ester moiety;, R2 represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or an aralkyl group, said groups being optionally substituted, or R2 represents a carboxylic ester moiety;, n = 1 - 4;, Y is O or S;, and esters thereof, are useful as heat and photo- stabilisers for polymeric materials.
- -
-
-