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oxides contammg at least two tertiary amine oxides per molecule. Illustrative poly(amine oxides), also called "poly ( tertiary amine oxides)", include the tertiary amine oxide analogues of aliphatic and alicyclic diamines such as, for example, 1,4-diaminobutane; 1,6-diaminohexane; 1,10- diaminodecane; and 1,4-diaminocyclohexane, and aromatic based diamines such as, for example, diamino anthraquino› nes and diaminoanisoles. 

Also included are tertiary amine oxides derived from oligomers and polymers of the aforementioned diamines. Useful amine oxides also include amine oxides attached to polymers, for example, polyolefins, polyacrylates, polyesters, polyamides, polystyrenes, and the like. When the amine oxide is attached to a polymer, the average number of amine oxides per polymer can vary widely as not all polymer chains need to contain an amine oxide. All of the aforemen› tioned amine oxides may optionally contain at least one -0-, -S-, -SO-, -CO$_{2}$ -, -CO-, or -CONE$_{4}$ - moiety. In a preferred embodiment, each ter- tiary amine oxide of the polymeric tertiary amine oxide contains a C$_{1 }$ residue. 

The groups E$_{1}$ , E$_{2 }$ and E$_{3 }$ of formula (I) may be attached to a molecule containing a hindered amine. Hindered amines are known in the art and the amine oxide of the present invention may be attached to the hindered amine in any manner and structural position of the hindered amine. Useful hindered amines when part of a compound of the amine oxide coadditive include those of the general formulas (II) and (III): 

wherein L$_{1 }$ and Rx are as described above. Also included are amine oxides containing more than one hindered amine and more than one saturated amine oxide per molecule. The hindered amine may be attached to a poly(tertiary amine oxide) or attached to a polymeric substrate, as discussed above. 

The co-stabilizers, with the exception of the benzofura› nones listed under 11, are added for example in concentra› tions of 0.01 to 10%, relative to the total weight of the material to be stabilized. 

Further preferred compositions comprise, in addition to components (a) and (b) further additives, in particular phe› nolic antioxidants, light stabilizers or processing stabilizers. 

Particularly preferred additives are phenolic antioxidants (item 1 of the list), sterically hindered amines (item 2.6 of the list), phosphites and phosphonites (item 4 of the list) and peroxide-destroying compounds (item 5.) of the list. 

Additional additives (stabilizers) which are also particu› larly preferred are benzofuran-2-ones, such as described, for example, in U.S. Pat. No. 4,325,863, U.S. Pat. No. 4,338, 244 or U.S. Pat. No. 5,175,312. 

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The phenolic antioxidant of particular interest is selected from the group consisting of n-octadecyl 3,5-di-tert-butyl- 4-hydroxyhydrocinnamate, neopentanetetrayl tetrakis(3,5- di-tert-butyl-4-hydroxyhydrocinammate ), di-n-octadecyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate, 1,3,5-tris(3, 5-di-tert-buty 1-4-hydroxybenzy l)isocyanurate, thiodiethy 1- ene bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate), 1,3,5- trimethy l-2,4,6-tris(3 ,5-di-tert-buty 1-4-hydroxybenzy 1) benzene, 3,6-dioxaoctamethylene bis(3-methyl-5-tert-butyl- 4-hydroxyhydrocinnamate ), 2,6-di-tert-butyl-p-cresol, 2,2’› ethy lidene-bis( 4,6-di-tert-buty lp henol), 1,3,5-tris(2,6- dimethyl-4-tert-butyl-3-hydroxybenzyl)isocynurate, 1,1,3,› tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, 1,3,5- tris-[ 2-( 3 ,5-di-tert-bu ty 1-4-hydroxy h ydrocinnamo y lo xy) e thy 1] iso cyan ur ate, 3 ,5 -di-(3 ,5 -di-te rt-but y 1-4- hydroxybenzyl)mesitol, hexamethylene bis(3,5-di-tert› butyl-4-hydroxyhydrocinnamate ), 1-(3,5-di-tert-buty 1-4- h y droxy anilino )-3,5-di( octy lthio )-s-triazine, N ,N’ - hex am e th yle n e -bis( 3, 5 -di-te rt- but yl-4- hydroxyhydrocinnamamide ), calcium bis( ethyl 3,5-di-tert› butyl-4-hydroxybenzylphosphonate ), ethylene bis[3,3-di(3- tert-buty l-4-hydroxyphenyl)butyrate ], octyl 3,5-di-tert› buty 1-4-hydroxybenzy lmercaptoacetate, bis(3,5-di-tert› butyl-4-hydroxyhydrocinnamoyl)hydrazide, and N,N’-bis [ 2-( 3,5-di-tert-buty 1-4-hydroxyhydrocinnamoy loxy )-ethy 1 ]› oxamide. 

A most preferred phenolic antioxidant is neopentanetet- rayl tetrakis(3,5-di-tert-butyl-4-hydroxyhydrocinnamate ), n-octadecyl 3,5-di-tert-butyl-4-hydroxyhydrocinnamate, 1,3 ,5 -trim e thyl-2 ,4, 6-tris(3 ,5 -di-tert-bu tyl-4- hydroxybenzy l)benzene, 1,3,5-tris(3,5-di-tert-buty 1-4- hydroxybenzyl)isocyanurate, 2,6-di-tert-butyl-p-cresol or 2,2’-ethylidene-bis( 4,6-di-tert-buty lphenol). 

(II) 30 

The hindered amine compound of particular interest is selected from the group consisting of bis(2,2,6,6- tetramethy lpiperidin-4-y 1) sebaca te, bis(l ,2,2,6 ,6- pen tame thy lpiperidin-4-y 1) sebacate, di(l ,2,2,6,6- pen tame thy 1 pip eridin-4-y 1) (3 ,5 -di-tert-but y 1-4- hydroxybenzy 1) bu ty lmalona te, 4-benzoy 1-2,2,6 ,6- te tr am ethyl pipe ridine, 4-s teary lo xy-2, 2, 6, 6- tetramethylpiperidine, 3-n-octyl-7, 7,9 ,9-tetramethyl-1,3,8- tr i a z a-sp iro [ 4. 5] de cane -2 ,4-dio ne, tris(2 ,2, 6, 6- tetramethylpiperidin-4-yl) nitrilotriacetate, 1,2-bis(2,2,6,6- te tr ame thy 1-3-oxopip erazin-4-y 1 )ethane, 2,2,4,4- tetramethyl-7-oxa-3,20-diaza-21-oxodispiro[ 5 .1.11.2] heneicosane, polycondensation product of 2,4-dichloro-6- tert-octy lamino-s-triazine and 4,4’-hexamethylenebis ( amino-2,2,6,6-tetramethylpiperidine ), polycondensation product of l-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4- hydroxypiperidine and succinic acid, polycondensation product of 4,4’-hexamethylenebis-(amino-2,2,6,6- tetramethylpiperidine) and 1,2-dibromoethane, tetrakis(2,2, 6,6-tetramethylpiperidin-4-yl) 1,2,3,4- butanetetracarboxylate, tetrakis(l,2,2,6,6- pentamethylpiperidin-4-yl) 1,2,3,4-butanetetracarboxylate, polycondensation product of 2,4-dichloro-6-morpholino-s› triazine and 4,4’-hexamethylenebis(amino-2,2,6,6- tetramethylpiperidine ), N,N’ ,N" ,N"’-tetrakis[( 4,6-bis(butyl- 1,2,2,6,6-pe ntamethy lpiperidin -4-y l)-aminos-triazin-2-y 1 ]- 1,10-diamino-4,7-diazadecane, polycondensation product of 2,4-dichloro-6-morpholino-s-triazine and 4,4’› hexamethylenebis( amino-1,2,2,6,6-pentamethylpiperidine ), mixed [2,2,6,6-te tramethy lpiperidin-4-y 1/~, ~, ~ ’, ~ ’› tetramethyl-3,9-(2,4,8,10-tetraoxaspiro[ 5 .5]undecane) diethyl] 1,2,3,4-butanetetracarboxylate, mixed [1,2,2,6,6- pentamethylpipeidin-4-yW,~,~•,~•-tetramethyl-3,9-(2,4,8, 10-te tr ao xasp iro[ 5. 5 ]unde cane) die thy 1] 1,2, 3 ,4- 

(III) 

