Derivatives of 2,2,6,6-tetramethyl-4-piperidinol for use as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials
AssigneeCiba-Geigy Corporation
InventorsValerio Borzatta, Roberto Scrima, Primo Carrozza
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Abstract
The present invention relates to novel piperidine compounds of the formula (I) V5 V pV ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 are as defined in the text. The compounds of the invention can be used as fight stabilizers, heat stabilizers and oxidation stabilizers for organic materials, in particular synthetic polymers.
Claims12
A compound of the formula (I) ##STR23## in which R.sub.1 is hydrogen, C.sub.1 -C.sub.8 alkyl, O.sup..cndot., OH, CH.sub.2 CN, C.sub.1 -C.sub.18 alkoxy, C.sub.5 -C.sub.12 cycloalkoxy, C.sub.3 -C.sub.6 alkeny C.sub.7 -C.sub.9 phenylalkyl unsubstituted or mono-, di- or tri-substituted on the phenyl by C.sub.1 -C.sub.4 alkyl or R.sub.1 is aliphatic C.sub.1 -C.sub.8 acyl;
- R.sub.2 is a direct bond, methylene, carbonyl or a group ##STR24## the group R.sub.4 being bound to the group ##STR25## R.sub.3 is C.sub.5 -C.sub.18 alkyl, C.sub.3 -C.sub.18 alkenyl, C.sub.5 -C.sub.12 cycloalkyl unsubstituted or mono-, di- or tri-substituted by C.sub.1 -C.sub.4 alkyl, or R.sub.3 is C.sub.7 -C.sub.9 phenylalkyl which is mono-, di- or tri-substituted on the phenyl by C.sub.1 -C.sub.4 alkyl;
- R.sub.4 is linear C.sub.1 -C.sub.4 alkylene, a group ##STR26## a group ##STR27## C.sub.2 -C.sub.4 oxaalkylene, C.sub.5 -C.sub.7 cycloalkyl-1,2-ene or C.sub.5 -C.sub.7 cycloalken-1,2-ylene;
- R.sub.5 is C.sub.1 -C.sub.18 alkyl or C.sub.3 -C.sub.18 alkenyl;
- and
- R.sub.6 is hydrogen or C.sub.1 -C.sub.4 alkyl,
- with the proviso that, when R.sub.1 is hydrogen and R.sub.3 is --C.sub.16 H.sub.33, R.sub.2 is not a direct bond or a carbonyl group.
A composition which contains an organic material susceptible to degradation induced by light, heat and oxidation and at least one compound of the formula (II) ##STR37## in which R.sub.1 is hydrogen, C.sub.1 -C.sub.8 alkyl, O.sup..cndot., OH, CH.sub.2 CN, C.sub.1 -C.sub.18 alkoxy, C.sub.5 -C.sub.12 cycloalkoxy, C.sub.3 -C.sub.6 alkenyl, C.sub.7 -C.sub.9 phenylalkyl unsubstituted or mono-, di- or tri-substituted on the phenyl by C.sub.1 -C.sub.4 alkyl;
- or aliphatic C.sub.1 -C.sub.8 acyl,
- R.sub.2 is a direct bond, methylene, carbonyl or a group ##STR38## the group R.sub.4 being bound to the group ##STR39## R.sub.3 is C.sub.5 -C.sub.18 alkyl, C.sub.3 -C.sub.18 alkenyl, C.sub.5 -C.sub.12 cycloalkyl unsubstituted or mono-, di- or tri-substituted by C.sub.1 -C.sub.4 alkyl;
- or C.sub.7 -C.sub.9 phenylalkyl unsubstituted or mono-, di- or tri-substituted on the phenyl by C.sub.1 -C.sub.4 alkyl,
- R.sub.4 is linear C.sub.1 -C.sub.4 alkylene, a group ##STR40## a group ##STR41## C.sub.2 -C.sub.4 oxaalkylene, C.sub.5 -C.sub.7 cycloalkyl-1,2-ene, C.sub.5 -C.sub.7 cycloalken-1,2-ylene or 1,2-phenylene,
- R.sub.5 is C.sub.1 -C.sub.18 alkyl or C.sub.3 -C.sub.18 alkenyl, and
- R.sub.6 is hydrogen or C.sub.1 -C.sub.4 alkyl.
Dependencies are inferred from the claim text.