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US 4,378,443 AGranted
2,2,6,6-Tetraalkyl-4-piperidyl-bix-spiro-ethers as light stabilizers for synthetic polymers
AssigneeAdeka Argus Chemical Co., Ltd.
InventorsMotonobu Minagawa, Naohiro Kubota, Toshihiro Shibata
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Abstract
2,2,6,6-Tetraalkyl-4-piperidyl-bis-spiro-ethers are provided, useful as stabilizers for lessening deterioration due to exposure to light of organic polymeric materials, and having the general formula: ##STR1##
Claims27
A 2,2,6,6-tetraalkyl-4-piperidyl-bis-spiro-ether useful as a stabilizer for lessening deterioration due to exposure to light of organic polymeric materials, having the formula:
- ##STR31## wherein:
- R.sub.1 and R.sub.2 each are selected from the group consisting of hydrogen, alkyl, hydroxyalkyl, acyl, aryl, alkaryl, carbamoyl and ester having one to about twenty carbon atoms;
- Z is selected from the group consisting of alkylene;
- arylene;
- alkylene-arylene;
- ##STR32## R.sub.6 being alkyl or aryl and R.sub.7 being alkylene, cycloalkylene or arylene, each having from one to about twenty carbon atoms;
- R.sub.3 is selected from the group consisting of alkyl and aryl having from one to about eighteen carbon atoms;
- and ##STR33## R.sub.5 is selected from the group consisting of hydrogen and lower alkyl;
- X is selected from the group consisting of hydrogen, oxyl (O.sup..) and lower alkyl having from one to about five carbon atoms;
- m is zero, one or two;
- and
- n is a number from one to ten.
9 more elements
A 2,2,6,6-tetraalkyl-4-piperidyl-bis-spiro-ether useful as a stabilizer for lessening deterioration due to exposure to light of organic polymeric materials, having the formula:
- ##STR43## wherein:
- R.sub.1 is selected from the group consisting of hydrogen, alkyl, hydroxyalkyl, acyl, aryl, alkaryl, carbamoyl and ester having one to about twenty carbon atoms;
- R.sub.2 is selected from the group consisting of alkyl, hydroxyalkyl, acyl, aryl, alkaryl, carbamoyl and ester having one to about twenty carbon atoms;
- R.sub.5 is selected from the group consisting of hydrogen and lower alkyl;
- X is selected from the group consisting of hydrogen, oxyl (O.degree.) and lower alkyl having from one to about five carbon atoms.
2 more elements
Dependencies are inferred from the claim text.