27  US 6,872,832 B2  28  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- 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.  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.  Further preferred compositions comprise, in addition to  components (a) and (b) further additives, in particular phe› nolic antioxidants, light stabilizers or processing stabilizers.  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.  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.  (II) 30  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).  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.  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):  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.  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.  (III) 