Long chain N-alkyl-alpha-alkyl nitrones and polyolefin compositions stabilized therewith

Claim 2

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.

Claim 3

A compound according to claim 1 where T is hexadecyl, heptadecyl or octadecyl or is the alkyl mixture found in hydrogenated tallow amine.

Claim 4

A compound according to claim 2 where T is the alkyl mixture found in hydrogenated tallow amine.

Claim 5

A compound according to claim 1 where G is hydrogen or methyl.

Claim 6

A compound according to claim 4 where G is hydrogen.

Claim 7

A compound according to claim 1 where E is tridecyl, pentadecyl, hexadecyl, heptadecyl or is the alkyl mixture found in hydrogenated tallow amine with one less carbon atom per alkyl group.

Claim 8

A compound according to claim 6 where E is the alkyl mixture found in hydrogenated tallow amine with one less carbon atom per alkyl group.

Claim 9

A nitrone according to claim 1 wherein T is the alkyl mixture found in hydrogenated tallow amine, G is hydrogen, and E is the alkyl mixture found in hydrogenated tallow amine with one less carbon atom per alkyl group.

Claim 10

The compound according to claim 1 which is N-octa-decyl-alpha-heptadecyl nitrone.

Claim 11

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.

Claim 12

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.

Claim 13

A composition according to claim 10 wherein component (a) is a polyolefin which is a homopolymer or copolymer of an alpha-olefin.

Claim 14

A composition according to claim 11 wherein the polyolefin is selected from the group consisting of polypropylene, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, poly(butene-1), ethylene/vinyl acetate copolymer, ethylene/propylene copolymer and copolymers of ethylene or of propylene with other alpha-olefins.

Claim 15

A composition according to claim 12 wherein the polyolefin is polypropylene, high density polyethylene, ethylene/propylene copolymer or a copolymer of ethylene or of propylene with another alpha-olefin.

Claim 16

A composition according to claim 10 where in component (b) T is hexadecyl, heptadecyl or octadecyl or is the alkyl mixture found in hydrogenated tallow amine.

Claim 17

A composition according to claim 14 wherein T is the alkyl mixture found in hydrogenated tallow amine.

Claim 18

A composition according to claim 10 where in component (b) G is hydrogen or methyl.

Claim 19

A composition according to claim 16 wherein G is hydrogen.

Claim 20

A composition according to claim 10 where in component (c) E is tridecyl, pentadecyl, hexadecyl heptadecyl or is the alkyl mixture found in hydrogenated tallow amine with one less carbon atom per alkyl group.

Claim 21

A composition according to claim 18 wherein E is the alkyl mixture found in hydrogenated tallow amine with one less carbon atom per alkyl group.

Claim 22

A composition according to claim 10 which additionally contains a stabilizing amount of a stabilizer or mixture of stabilizers selected from the group consisting of the phenolic antioxidants, the hindered amine light stabilizers, the ultraviolet light absorbers, the organic phosphorus compounds, the alkaline metal salts of fatty acids, the thiosynergists and the hydroxylamines.

Claim 23

A composition according to claim 20 wherein the additional stabilizer is (c) a stabilizing amount of an alkaline metal salt of a fatty acid or mixture thereof.

Claim 24

A composition according to claim 21 wherein component (c) is calcium stearate, zinc stearate, magnesium behenate, sodium ricinoleate or potassium palmitate.

Claim 25

A composition according to claim 22 wherein component (c) is calcium stearate or zinc stearate.

Claim 26

A composition according to claim 20 wherein the additional stabilizer is (d) a stabilizing amount of a phenolic antioxidant or mixture thereof.

Claim 27

A composition according to claim 24 wherein the phenolic antioxidant of component (d) is selected from the group consisting of n-octadecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate, neopentanetetrayl tetrakis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), di-n-octadecyl 3,5-di-tert-butyl-4-hydroxy-benzylphosphonate, 1,3,5-tris-(3,5,-di-tert-butyl-4-hydroxybenzyl)isocyanurate, thiodiethylene bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl)-benzene, 3,6-di-oxaoctamethylene bis(3-methyl-5-tert-butyl-4-hydroxyhydrocinnamate), 2,6-di-tert-butyl-p-cresol, 2,2'-ethylidene-bis(4,6-di-tert-butylphenol), 1,3,5-tris(2,6-dimethyl-4-tert-butyl-3-hydroxybenzyl) isocyanurate, 1,1,3-tris-(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, 1,3,5-tris-[2-(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy)-ethyl] isocyanurate, 3,5-di-(3,5-di-tert-butyl-4-hydroxybenzyl)-mesitol, hexamethylene bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate),1-(3,5-di-tert-butyl-4-hydroxyanilino)-3,5-di(octylthio)-s-triazine, N,N'-hexamethylene-bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamamide), calcium bis(ethyl-3,5-di-tert-butyl-4-hydroxybenzylphosphonate), ethylene bis[3,3-di(3-tert-butyl-4-hydroxyphenyl)butyrate], octyl 3,5-di-tert-butyl-4-hydroxybenzylmercaptoacetate, bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl)hydrazide, and N,N'-bis[2-(3,5-tert-butyl-4-hydroxyhydroxo-cinnamoyloxy)ethyl]-oxamide.

Claim 28

A composition according to claim 25 wherein the phenolic antioxidant is neopentanetetrayl tetrakis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), n-octadecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 2,6-di-tert-butyl-p-cresol or 2,2'-ethylidene-bis-(4,6-di-tert-butylphenol).

Claim 29

A composition according to claim 20 wherein the additional stabilizer is (e) a stabilizing amount of an N,N-dialkylhydroxylamine where alkyl is of 8 to 18 carbon atoms.

Claim 30

A composition according to claim 27 wherein component (e) is N,N-di(hydrogenated tallow)hydroxylamine and component (b) is N-octadecyl-alpha-heptadecyl nitrone.