Polymeric malonates
AssigneeCiba-Geigy Corporation
InventorsAndreas Schmidt, Hansjorg Heller
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Abstract
The polymeric malonates of the invention have the formula ##SPC1## Wherein R.sub.1 and R.sub.2 are alkyl groups, R.sub.3 is an alkyl or hindered hydroxybenzyl group, A is oxygen or amino group, X is a divalent group such as unsubstituted or substituted alkylene or thioalkylene, Y is hydrogen or a hindered hydroxybenzyl group, Z is hydrogen, hydroxy, alkoxy or thioalkyl group, and n is 2 to 100. These compounds are prepared by reacting esters of malonates with divalent alcohols or with diamines and then with a monovalent alcohol. They are useful as stabilizers of organic materials subject to oxidative and thermal degradation.
Claims3
A polymer resin of the general formula I ##SPC15##
- wherein R.sub.1 and R.sub.2 denote alkyl with 1 to 5 carbon atoms, cycloalkyl with 6 to 8 carbon atoms or aralkyl with 7 to 9 carbon atoms, R.sub.3 denotes hydrogen, alkyl with 1 to 18 carbon atoms, or the group ##SPC16##
- A denotes --O--;
- --NH--;
- or ##EQU5## wherein R.sub.4 is an alkyl group with 1 - 4 carbon atoms, X denotes alkylene with 2 to 18 carbon atoms, alkenylene with 4 to 18 carbon atoms wherein A is directly linked to a saturated carbon atom in the alkenylene, oxaalkylene with 4 to 18 carbon atoms wherein A is directly linked to a carbon atom in the oxaalkylene which does not carry any further hetero-atoms, thiaalkylene with 4 to 18 carbon atoms wherein A is directly linked to a carbon atom in the thiaalkylene which does not carry any further hetero-atoms, mercaptoalkylene with 3 to 18 carbon atoms, alkylthioalkylene with 4 to 21 carbon atoms, hydroxyalkylene with 3 to 18 carbon atoms, acyloxyalkylene with 5 to 21 carbon atoms, phenoxyalkylene with 9 to 20 carbon atoms, or alkoxyalkylene with 4 to 21 carbon atoms, wherein the mercapto, alkylthio, hydroxyl, acyloxy, phenoxy or alkoxy group of the mercaptoalkylene, alkylthioalkylene, hydroxyalkylene, acyloxyalkylene, phenoxyalkylene or alkoxyalkylene is bonded to a carbon atom not linked to the group A, or a group ##SPC17##
- wherein m.sub.1 and m.sub.2 are 1, 2, or 3, Y denotes hydrogen or the group ##SPC18##
- Z denotes OR.sub.5 or, if Y denotes hydrogen, also denotes the group
- -- A -- X -- A -- H,
- with the abovementioned meanings for A and X and R.sub.5 denotes hydrogen, alkyl with 1 to 18 carbon atoms, oxaalkyl with 3 to 20 carbon atoms, wherein the carbon atom in R.sub.5 linked to oxygen does not carry any further hetero-atoms, thiaalkyl with 3 to 20 carbon atoms wherein the carbon atom in R.sub.5 linked to the oxygen does not carry any further hetero-atoms, or 1-phospha-2,6,7-trioxabicyclo[2,2,2]-oct-4-yl-methyl, and n denotes 2 to 100.
Dependencies are inferred from the claim text.