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US 4,898,901 AGranted
Long chain N-alkyl-alpha-alkyl nitrones and polyolefin compositions stabilized therewith
AssigneeCiba-Geigy Corporation
InventorsRamanathan Ravichandran, Stephen D. Pastor, Raymond Seltzer, Ambelal R. Patel
Life of this patent
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Abstract
Long chain N-alkyl-alpha-alkyl nitrones represent particularly valuable process stabilizers for polyolefin compositions. The nitrone derived from the long chain alkyl mixture present in di(hydrogenated tallow)amine is especially useful for this purpose.
Claims28
A long chain N-alkyl-alpha-alkyl nitrone compound of the formula ##STR3## wherein T is a straight or branched chain alkyl of 16 to 18 carbon atoms,
- G is hydrogen, methyl or ethyl,
- E is a straight or branched chain alkyl of 13 to 17 carbon atoms, and
- where the sum of the carbon atoms in G plus E is equal to 15 to 17.
A stabilized composition which comprises
- (a) a saturated polyolefin or mixture thereof, and
- (b) a stabilizing amount of a long chain N-alkyl-alpha-alkyl nitrone of the formula ##STR4## wherein T is a straight or branched chain alkyl of 16 to 18 carbon atoms,
- G is hydrogen, methyl or ethyl,
- E is a straight or branched chain alkyl of 13 to 17 carbon atoms, and
- where the sum of the carbon atoms in G plus E is equal to 15 to 17.
2 more elements
Dependencies are inferred from the claim text.