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US 5,004,770 AGranted
Polymeric substrates stabilized with N-substituted hindered amines
AssigneeCiba-Geigy Corporation
InventorsFrank P. Cortolano, Raymond Seltzer, Ambelal R. Patel
Life of this patent
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Abstract
Hindered amines based on various 2,2,6,6-tetralkylated nitrogen-containing heterocyclic moieties wherein the hindered nitrogen atom on the ring is substituted with OH or OR substituents and the 4-position of the ring is substituted with a diversity of substituents are effective in protecting a variety of non-polyolefin substrates against the adverse effects of light, heat and oxygen.
Claims23
A stabilized composition comprising
- (a) an organic polymer containing hetero atoms, double bonds or aromatic rings and
- (b) an effective stabilizing amount of a substituted hindered amine derivative containing the group ##STR16## wherein R is hydrogen or methyl, and R.sub.1 is hydrogen, C.sub.1 -C.sub.18 alkyl, C.sub.2 -C.sub.18 alkenyl, C.sub.2 -C.sub.18 alkynyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.6 -C.sub.10 bicycloalkyl, C.sub.5 -C.sub.8 cycloalkenyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.9 aralkyl, C.sub.7 -C.sub.9 aralkyl substituted by alkyl or aryl, or ##STR17## wherein D is C.sub.1 -C.sub.18 alkyl, C.sub.1 -C.sub.18 alkoxy, phenyl, pheny substituted by hydroxy, alkyl or alkoxy, or amino or amino mono- or disubstituted by alkyl or phenyl.
Dependencies are inferred from the claim text.