Piperidine derivatives and their use as stabilizers

Details Piperidine derivatives and their use as stabilizers Piperidine derivatives and their use as stabilizers

1973-07-19

1976-02-24

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4575N, 260 458NZ, 26029363, 26029364, 2602948G, 260295SP, 260296D, C08K 500

Patent

active

039403637

ABSTRACT:
Piperidine derivatives having the formula ##SPC1##
Wherein
R' represents an alkylene group which may be interrupted with an oxygen or sulfur atom, an alkenylene group, an alkynylene group, an aralkylene group, an aliphatic diacyl group, a group of the formula ##EQU1## IN WHICH N IS AN INTEGER OF 1 OR 2 AND X is an alkylene group, or o-, m- or p-phenylene group or the carbon atoms of CO groups may be directly joined in the absence of X or a group of the formula ##EQU2## in which Y is an alkylene group or O-, m- or p-phenylene group; R represents hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group, an aryl group, an alkoxycarbonylalkenyl group, an aliphatic, aromatic or heterocyclic monoacyl group, a N-substituted carbamoyl group, a N-substituted thiocarbamoyl group or a monovalent radical derived from an oxoacid;
R.sub.1 and R.sub.2 individually represent a lower alkyl group or they jointly represent, together with the oxygen atoms, a group of the formula ##SPC2##
In which R.sub.3 is hydrogen atom, a lower alkyl group or hydroxymethyl or a group of the formula ##SPC3##
In which R.sub.4 and R.sub.5 may be the same or different and each represents hydrogen atom, a lower alkyl group or hydroxymethyl group and R.sub.6 is hydrogen atom or a lower alkyl group; and
R.sub.7 represents an alkyl group or an aralkyl group.
They are prepared from the corresponding piperidine derivatives by the reaction with a halide R'--(Q).sub.2 wherein R' is as defined above and Q is a halogen atom and useful as stabilizers against photo- and thermal-deterioration of various synthetic polymers.

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