Field of the Invention

The presently claimed invention relates to a stabilizer mixture comprising at least one com- pound selected from compound of formula (A) and compound of formula (B), and at least one antioxidant compound, wherein the weight ratio of at least one compound of formula (A) and/or the compound of formula (B) to at least one antioxidant is in the range of 1:2 to 1:20. Further, the presently claimed invention relates to a composition comprising an organic ma- terial and a stabilizer mixture. The presently claimed invention also relates to the use of the stabilizer mixture for stabilizing an organic material exposed to light.

Background of the Invention

Organic materials namely synthetic polymers such as polyolefins, polyethylenes, and the like are used in wide variety of applications due to their ease of use in the manufacturing of a variety of extruded and moulded articles. However, these articles frequently suffer from gen- eral stability due to repeated exposure to the UV light. To prevent the detrimental effects of UV light on the articles prepared from the organic material, different additives or additive mixtures are used. However, some classes of additives (for e.g., antioxidants) are not light stable. Thus, it is an object of the present invention to provide a stabilizer mixture to stabilize the non-light stable additives.

Summary of the Invention

Surprisingly, it has been found that the stabilizer mixture of the presently claimed invention stabilize the non-light stable additives in articles when exposed to light.

Thus, in one aspect, the presently claimed invention is directed to a stabilizer mixture com- prising

(i) at least one compound selected from compound of formula (A) and compound of formula (B), wherein E ₁ is C _1- C ₁₈ alkyl; and

E ₂ , E ₃ , E ₄ and E ₅ independently of one another are hydrogen, C _1- C ₁₈ alkyl, phenyl or phenyl substituted by 1, 2 or 3 C _1- C ₄ a I ky I ; and

Wherein

L is ROCOR’, wherein R and R’ inde- pendently of one another are C ₁ to C ₁₈ al- kylidene

E6, E7, E8, E9, E10, Ell, E12, E13 independently of one another are hydro- gen, C _1- C ₁₈ alkyl, phenyl or phenyl substi- tuted by 1, 2 or 3 C _1- C ₄ a I ky I ; and

(ii) at least one antioxidant compound, wherein the weight ratio of at least one compound of formula (A) and/or the compound of formula (B) to at least one antioxidant is in the range of 1:2 to 1:20.

In another aspect, the presently claimed invention is directed to a composition comprising an organic material and a stabilizer mixture as defined above.

In yet another aspect, the presently claimed invention is directed to the use of the stabilizer mixture as defined above for stabilizing an organic material exposed to light.

Detailed Description of the Invention

Before the present compositions and formulations of the invention are described, it is to be under-stood that this invention is not limited to particular compositions and formulations de- scribed, since such compositions and formulation may, of course, vary. It is also to be under- stood that the terminology used herein is not intended to be limiting, since the scope of the presently claimed invention will be limited only by the appended claims.

If hereinafter a group is defined to comprise at least a certain number of embodiments, this is meant to also encompass a group which preferably consists of these embodiments only. Further-more, the terms "first", "second", "third" or "(a)", "(b)", "(c)", "(d)" etc. and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and that the embod- iments of the invention de-scribed herein are capable of operation in other sequences than described or illustrated herein. In case the terms "first", "second", "third" or “(A)”, “(B)” and “(C)” or "(a)", "(b)", "(c)", "(d)", "i", "ii" etc. relate to steps of a method or use or assay there is no time or time interval coherence between the steps, that is, the steps may be carried out simultaneously or there may be time intervals of seconds, minutes, hours, days, weeks, months or even years between such steps, unless other-wise indicated in the application as set forth herein above or below.

In the following passages, different aspects of the invention are defined in more detail. Each aspect so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature indicated as being preferred or advantageous may be combined with any other feature or features indicated as being preferred or advantageous.

Reference throughout this specification to "one embodiment" or "a preferred embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the presently claimed invention. Thus, appearances of the phrases "in one embodiment" or "in a preferred embodiment" or “in an- other embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment but may. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner, as would be apparent to a person skilled in the art from this disclosure, in one or more embodiments. Furthermore, while some embodiments described herein include some, but not other features included in other em- bodiments, combinations of features of different embodiments are meant to be within the scope of the invention, and form different embodiments, as would be understood by those in the art. For example, in the appended claims, any of the claimed embodiments can be used in any combination.

Furthermore, the ranges defined throughout the specification include the end values as well i.e. a range of 1 to 10 implies that both 1 and 10 are included in the range. For the avoidance of doubt, the applicant shall be entitled to any equivalents according to the applicable law.

Certain terms are first defined so that this disclosure can be more readily understood. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the inven- tion pertain.

In an aspect, the presently claimed invention is directed to a stabilizer mixture comprising i. at least one compound selected from compound of formula (A) and compound of for- mula (B), wherein

Ei is C _1- C ₁₈ alkyl; and

E ₂ , E _g , E ₄ and E _: independently of one another are hydrogen, C _1- C ₁₈ alkyl, phenyl or phenyl substituted by 1, 2 or 3 C ₁ -C ₄ a I ky I ; and

Wherein

L is ROCOR’, wherein R and R’ inde- pendently of one another are C ₁ to C ₁₈ al- kylidene E6, E7, E8, E9, E10, Ell, E12, E13 independently of one another are hydro- gen, C _1- C ₁₈ alkyl, phenyl or phenyl substi- tuted by 1, 2 or 3 C ₁ -C ₄ alkyl; and ii. at least one antioxidant compound, wherein the weight ratio of at least one compound of formula (A) and/or the compound of formula (B) to at least one antioxidant is in the range of 1:2 to 1:20, preferably 1:2 to 1:15, and more preferably 1:2 to 1:10.

In an exemplary embodiment, the weight ratio of at least one compound of formula (A) to at least one antioxidant is 1:3.33.

In an embodiment, the presently claimed invention is directed to a stabilizer mixture com- prising: at least one compound selected from compound of formula (A), wherein

E ₁ is C _1- C ₁₈ alkyl; and

E ₂ , Eg, E ₄ and E _: independently of one another are hydrogen, C _1- C ₁₈ alkyl, phenyl or phenyl substituted by 1, 2 or 3 C ₁ -C ₄ a I ky I ; and ii. at least one antioxidant, wherein the weight ratio of at least one compound of formula (A) to at least one antioxi- dant is in the range of 1:2 to 1:20, preferably 1:2 to 1:15, and more preferably 1:2 to 1:10.

Compound of formula (A):

In an embodiment, the stabilizer mixture comprises at least one compound of formula (A)

I n an embodiment, E ₄ is C _1- C ₁₈ alkyl, preferably C ₁ -C ₈ alkyl.

I n an embodiment, E ₂ , E ₃ , E ₄ and E ₅ independently of one another are hydrogen, C _1- C ₁₈ alkyl, phenyl or phenyl substituted by 1, 2 or 3 C ₁ -C ₄ alkyl, preferably E ₂ , E ₃ , E ₄ and E ₅ independently of one another are hydrogen, C ₁ -C ₄ alkyl or phenyl.

Examples of alkyl having up to 18 carbon atoms are methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, 2 -ethyl butyl , n-pentyl, isopentyl, 1-methylpentyl, 1,3-dimethyl- butyl, n-hexyl, 1-methylhexyl, n-heptyl, isoheptyl, 1 ,1 ,3,3-tetra methyl butyl , 1-methylheptyl, 3- methylheptyl, n-octyl, 2-ethy I hexyl , 1,1,3-trimethyl hexyl , 1,1,3,3-tetramethylpentyl, nonyl, decyl, undecyl, 1-methylundecyl, dodecyl, 1,1,3,3,5,5-hexamethylhexyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl and octadecyl.

In a preferred embodiment, the at least one compound of formula (A) is selected from the formulae (A-l), (A-2) and (A-3).

Most of the compounds of the formulae (A) are known and can be prepared in analogy to processes known to those skilled in the art. The compounds of the formula (A) can be prepared for example in analogy to the methods described in US-B-6,255,483.

Compound of formula (B):

In an embodiment, the stabilizer mixture comprises at least one compound of formula (B).

In an embodiment, L is ROCOR’, wherein R and R’ independently of one another are C ₁ to C ₁₈ alkylidene.

In an embodiment, E ₆ , E ₇ , E ₈ , E _g , E ₁₀ , E ₁₁ , E ₁₂ , and E ₁₃ independently of one another are hydro- gen, C _1- C ₁₈ alkyl, phenyl or phenyl substituted by 1, 2 or 3 C ₁ -C ₄ alkyl, preferably E ₆ , E ₇ , E ₈ , E ₉ , E ₁₀ , E ₁₁ , E ₁₂ , and E ₁₈ independently of one another are hydrogen, C ₁ -C ₄ alkyl or phenyl.

Examples of alkylidene having up to 18 carbon atoms are methylidene, ethylidene, propy- lidene, butylidene, pentylidene, hexylidene, heptylidene, octylidene, nonylidene, decylidene, undecylidene, dodecylidene, tridecylidene, tetradecylidene, pentadecylidene, hexadecyli- dene, heptadecylidene, and octadecylidene.

Examples of alkyl having up to 4 carbon atoms are methyl, ethyl, propyl, isopropyl, n-butyl, sec- butyl, isobutyl, tert-butyl, and 2-ethylbutyl. In a preferred embodiment, the at least one compound of formula (B) is selected from the formula (B- 1). The antioxidant is selected from the group consisting of 2,4-bis(octylmercapto)-6-(3,5-di- tert- butyl -4-hyd roxya ni I i no) -1 ,3.5-triazi ne, 2-octylmercapto-4,6-bis(3,5-di-tert-butyl-4-hy- droxyanilino)-1,3,5-triazine, 2-octylmercapto-4,6-bi(3,5-di-tert-butyl-4-hydroxyphenoxy)- 1 ,3.5-triazi ne, 2,4,6-tris(3,5-d i-tert- butyl -4-hyd roxy phenoxy) -1,2,3-triazine, 1,3,5-tris(3,5-di- tert- butyl -4- hydroxy benzyl) isocyan urate, 1,3,5 -tris(4-tert- butyl -3- hydroxy-2,6-di methyl ben- zyl) isocyan urate, 2, 4,6-tris (3,5 -d i-tert- butyl -4- hydroxy phenyl ethyl)- 1,3,5 -triazine, 1,3,5- tris (3,5 -d i -tert- butyl -4-hyd roxy p he ny I propionyl)-hexa hydro- 1,3,5 -triazine, 1,3,5-tris(3,5-di- cyc I o hexyl -4- hydroxy benzyl) isocyan urate, pentaerythritol tetra kis [3- [3,5 -d i-tert- butyl -4- hy- droxy phenyl] propionate, 1, 3,5 -tris(3,5-d i-tert- butyl -4- hydroxy benzyl) -2, 4,6-tri methyl ben- zene, 1,4- bis (3,5 -d i-tert- butyl -4- hydroxy be nzyl)-2,3,5,6-tetra methyl benzene, 2,4,6-tris(3,5- d i-tert- butyl -4- hydroxy benzyl) phenol, octadecyl 3 -(3,5 -d i-tert- butyl -4- hydroxy phenyl) propi- onate, octyl-3, 5-di-tert-butyl-4-hydroxy-hydrocinnamate, Hexamethylene bis[3-(3,5-di-tert- buty I -4- hydroxy phenyl) propionate], 3-(3,5-ditert-butyl-4- hyd roxy ph e ny I) -N-[6-[3-(3,5- ditert-butyl-4-hydroxyphenyl)propanoylamino]hexyl]propenamid e, calcium bis[mo- noethyl(3,5-di-tert-butyl-4-hydroxylbenzyl)phosphonate], triethylene glycol bis(3-tert-butyl- 4-hydroxy-5-methylphenyl)propionate, 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid 1,3,5- tris(2-hydroxyethyl)-s-triazinetrione ester, 3-tert-butyl-2-hydroxy-5-methylphenyl sulfide, 2- Methyl-4,6-bis(n-octylsulfanylmethyl)phenol, 2,2'-thiodiethylene bis [3- (3,5 -d i-tert- butyl -4- hydroxyphenyl)propionate], 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate, 4- ((4,6- bis(octy Ithio) -1 ,3,5-triazi n-2-yl)amino) -2,6-d i-tert-buty I phenol , bis (1,2, 2,6,6- pen tame- thyl-4-piperidyl) [[3,5-bis(l,l-dimethylethyl)-4-hydroxyphenyl]methyl]butylmal onate, α -to- copherol, 3 -(3,5 -ditert- butyl -4- hyd roxy phenyl) -N'- [3- (3,5 -ditert- butyl -4- hyd roxy phenyl) pro- panoyl]propanehydrazide, tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate, eth- ylene bis [3,3 - bis [3 -(1,1-di methyl ethyl) -4- hyd roxy p he nyl]butanoate], benzyl-2-acetamido-2- deoxy- α -D-galactopyranoside, 2,2'-Methylenebis(6-tert-butyl-4-methylphenol) monoacry- late, 2-propenoic acid,2 -(1,1 -dimethyl ethyl) -6- [1- [3 -(1,1 -dimethyl ethyl) -5 -(1,1 -dimethyl pro- pyl) -2 -hyd roxy phenyl] ethyl] -4- (1,1 -dim ethyl propyl) phenyl ester, tris[2-tert-butyl-4-(5-tert- butyl-4-hydroxy-2-methylphenyl)sulfanyl-5-methylphenyl] phosphite, (1,2-dioxoeth- ylene) bis(i mi noethylene) bis (3- (3,5 -d i-tert- butyl -4- hyd roxy phenyl) propionate), phenol,

2,6- bis [[3- (1,1 -dimethyl ethyl) -2-hydroxy-5-methylphenyl]octahydro-4,7-methano -lH-in- denyl]-4-methyl-, 4,4' -thiobis(2-tert-butyl-5-methylphenol), 4,6-bis (octylthiomethyl) -o- cresol, - bis(octadecyl)hydroxylamine, benzenamine, N-phenyl-, reaction products with

2,4,4-trimethylpentene, 3,3’-thiodipropionic acid di-n-octadecyl ester, didodecyl 3,3' -thiodi- propionate, 4,4’- bis( α , α -dimethylbenzyl)diphenylamine, 3,3’-thiodipropionic acid dimyristyl ester, dioctadecyl disulfide, and 2,2-Bis[[3-(dodecylthio)-l-oxopropoxy]methyl]propane-1,3- diyl bis [3 - (dodecy I thio) propionate].

In a preferred embodiment, the antioxidant is selected from the group consisting of 2,4- bis(octylmercapto)-6-(3,5-di-tert-butyl-4-hydroxyanilino)-1, 3,5-triazine, 2-octylmercapto- 4,6-bis(3,5-d i-tert- buty I -4- hyd roxyan i lino)-1,3,5-triazine, 2-octylmercapto-4,6-bi(3,5-di-tert- butyl-4-hydroxyphenoxy)-1,3,5-triazine, 2,4,6-tris(3,5-di-tert-butyl-4-hydroxyphenoxy)- 1,2,3-triazine, 1, 3,5 -tris (3,5 -d i-tert- buty I -4- hydroxy benzyl) isocyan urate, 1, 3,5 -tris(4-tert- bu- ty I -3- hyd roxy-2,6-di methyl benzyl) isocyan urate, 2, 4,6-tris (3,5 -d i-tert- buty I -4- hydroxy- phenyl ethyl) -1,3,5 -triazine, 1, 3,5 -tris (3,5 -d i-tert- buty I -4- hydroxy phenyl pro pionyl) - h exa hy- dro- 1,3,5 -triazine, 1,3,5 -tris (3,5 -dicyc I o hexyl -4- hydroxy benzyl) isocyan urate, pentaerythritol tetra kis [3 - [3,5 -d i-tert- buty I -4- hydroxy phenyl] propionate, 1,3,5 -tris (3,5 -d i-tert- buty I -4- hy- droxy benzyl) -2, 4,6-tri methyl benzene, 1,4- bis (3,5 -d i-tert- buty I -4- hydroxy benzyl) -2,3,5,6-tet- ramethylbenzene, 2,4,6-tris(3,5-di-tert-butyl -4- hyd roxy be nzy I) phenol, octadecyl 3- (3,5-d i- tert- buty I -4- hydroxy phenyl) propionate, octyl -3,5-d i-tert-butyl-4-hydroxy-hydrocinnamate,

H exa methylene bis [3 -(3,5-d i-tert- buty I -4- hyd roxy phenyl) propionate], 3-(3,5-ditert-butyl-4- hydroxyphenyl)-N-[6-[3-(3,5-ditert-butyl-4-hydroxyphenyl)pro panoylamino]hexyl]propena- mide, calcium bis[monoethyl(3,5-di-tert-butyl-4-hydroxylbenzyl)phosphonate ], triethylene glycol bis(3-tert-butyl -4- hydroxy-5- methyl phenyl) propionate, 3,5 -d i-tert- buty I -4- hyd roxy hy- drocinnamic acid 1,3,5-tris(2-hydroxyethyl)-s-triazinetrione ester, 3-tert-butyl-2-hydroxy-5- methylphenyl sulfide, 2-Methyl-4,6-bis(n-octylsulfanylmethyl)phenol, 2,2'-thiodiethylene bis [3 -(3,5-d i-tert- buty I -4- hyd roxy phenyl) propionate], 2, 4-d i-tert- buty I phenyl 3,5-d i-tert- bu- ty I -4- hyd roxy benzoate, 4-((4,6-bis(octylth io) -1 ,3,5-triazi n -2-yl) ami no) -2,6-d i-tert- buty I phe- nol, bis(l,2,2,6,6-pentamethyl-4-piperidyl) [ [3,5 -bis (1,1 -dimethyl ethyl) -4- hyd roxy- phenyl]methyl]butylmalonate, α -tocopherol, 3-(3,5-ditert-butyl-4- hyd roxy p he ny I) -N'-[3- (3,5 -ditert- buty I -4- hyd roxy phenyl) pro pa noyl] pro pane hyd razide, tris (4-tert- buty I -3 -hydroxy- 2, 6-dimethylbenzyl) isocyanurate, ethylene bis[3,3-bis[3-(l,l-dimethylethyl) -4- hyd roxy- phenyl]butanoate], benzyl-2-acetamido-2-deoxy- α -D-galactopyranoside, 2,2'-Meth- ylenebis(6-tert-butyl-4-methylphenol) monoacrylate, 2-propenoic acid, 2-(l, 1-di- methyl ethyl) -6- [1- [3- (1,1 -dimethyl ethyl) -5 -(1,1 -dimethyl propyl) -2 -hyd roxy phenyl] ethyl] -4- (1,1 -dimethyl propyl) phenyl ester, tris [2 -te rt- buty I -4- (5 -tert- buty I -4- hyd roxy-2 - methylphenyl)sulfanyl-5-methylphenyl] phosphite, (l,2-dioxoe0thylene)bis(i mi noethylene) bis (3 -(3,5-d i-tert- buty I -4- hyd roxy phenyl) propionate), phenol, 2, 6-bis[ [3 -(1,1 -di- methyl ethyl) -2-hydroxy-5-methylphenyl]octahydro-4,7-methano -lH-indenyl] -4- methyl-, 4,4' -thiobis(2-tert-butyl-5-methylphenol), and 4,6-bis (octylthiomethyl) -o-cresol. In a more preferred embodiment, the antioxidant is selected from the group consisting of

1.3.5 -tris (3,5 -di-tert- butyl -4- hydroxy benzyl) isocyan urate, pentaerythritol tetrakis[3-[3,5-di- tert- butyl -4- hydroxy phenyl] propionate, and 1 ,3,5-tris(3,5-d i-tert- butyl -4-hyd roxybenzy I) -

2.4.6-tri methyl benzene.

In an embodiment, the stabilizer mixture further comprises at least one thiosynergist. The at least one thiosynergist is selected from the group consisting of dilauryl thiodipropionate, dim- istryl thiodipropionate, pentaerythritol tetrakis[3-(dodecylthio) propionate], distearyl thiodi- propionate and distearyl disulphide, preferably distearyl thiodipropionate.

In another aspect, the presently claimed invention is directed to a composition comprising: a. an organic material, and b. a stabilizer mixture as defined above.

In an embodiment, the organic material is selected from:

1. Polymers of monoolefins and diolefins, for example polypropylene, polyisobutylene, poly- but-l-ene, poly-4-methylpent-l-ene, polyvinylcyclohexane, polyisoprene or polybutadiene, as well as polymers of cycloolefins, for instance of cyclopentene or norbornene, polyethylene (which optionally can be crosslinked), for example high density polyethylene (HDPE), high density and high molecular weight polyethylene (HDPE-HMW), high density and ultrahigh molecular weight polyethylene (HDPE-UHMW), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), (VLDPE) and (ULDPE).

Polyolefins, i.e. the polymers of monoolefins exemplified in the preceding paragraph, prefer- ably polyethylene and polypropylene, can be prepared by different, and especially by the fol- lowing, methods: a) radical polymerisation (normally under high pressure and at elevated temperature). b) catalytic polymerisation using a catalyst that normally contains one or more than one metal of groups IVb, Vb, Vlb or VIII of the Periodic Table. These metals usually have one or more than one ligand, typically oxides, halides, alcoholates, esters, ethers, amines, alkyls, alkenyls and/or aryls that may be either p- or s-coordinated. These metal complexes may be in the free form or fixed on substrates, typically on activated magnesium chloride, titan i u m (111) chloride, alumina or silicon oxide. These catalysts may be soluble or insoluble in the polymerisation medium. The catalysts can be used by themselves in the polymerisation or further activators may be used, typically metal alkyls, metal hydrides, metal alkyl halides, metal alkyl oxides or metal alkyloxanes, said metals being elements of groups la, 11 a and/or Ilia of the Periodic Table. The activators may be modified conveniently with further ester, ether, amine or silyl ether groups. These catalyst systems are usually termed Phillips, Standard Oil Indiana, Ziegler (-Natta), TNZ (DuPont), metallocene or single site catalysts (SSC). 2. Mixtures of the polymers mentioned under 1), for example mixtures of polypropylene with polyisobutylene, polypropylene with polyethylene (for example PP/HDPE, PP/LDPE) and mixtures of different types of polyethylene (for example LDPE/HDPE).

3. Copolymers of monoolefins and diolefins with each other or with other vinyl monomers, for example ethylene/propylene copolymers, linear low density polyethylene (LLDPE) and mixtures thereof with low density polyethylene (LDPE), propylene/but-l-ene copolymers, propylene/isobutylene copolymers, ethylene/but-l-ene copolymers, ethylene/hexene copol- ymers, ethylene/methylpentene copolymers, ethylene/heptene copolymers, ethylene/octene copolymers, ethylene/vinylcyclohexane copolymers, ethylene/cycloolefin copolymers (e.g. ethylene/norbornene like COC), ethylene/l-olefins copolymers, where the 1-olefin is gener- ated in-situ; propylene/butadiene copolymers, isobutylene/isoprene copolymers, eth- ylene/vinylcyclohexene copolymers, ethylene/alkyl acrylate copolymers, ethylene/alkyl methacrylate copolymers, ethylene/vinyl acetate copolymers or ethylene/acrylic acid copol- ymers and their salts (ionomers) as well as terpolymers of ethylene with propylene and a diene such as hexadiene, dicyclopentadiene or ethylidene-norbornene; and mixtures of such copolymers with one another and with polymers mentioned in 1) above, for example polypro- pylene/ethylene-propylene copolymers, LDPE/ethylene-vinyl acetate copolymers (EVA), LDPE/ethylene-acrylic acid copolymers (EAA), LLDPE/EVA, LLDPE/EAA and alternating or random polyalkylene/carbon monoxide copolymers and mixtures thereof with other polymers, for example polyamides.

4. Hydrocarbon resins (for example C ₅ -C ₉ ) including hydrogenated modifications thereof (e.g. tackifiers) and mixtures of polyalkylenes and starch.

Homopolymers and copolymers from 1.) - 4.) may have any stereostructure including syndio- tactic, isotactic, hemi-isotactic or atactic; where atactic polymers are preferred. Stereoblock polymers are also included.

5. Polystyrene, poly(p-methylstyrene), poly( α -methylstyrene).

6. Aromatic homopolymers and copolymers derived from vinyl aromatic monomers including styrene, α -methylstyrene, all isomers of vinyl toluene, especially p-vinyltoluene, all isomers of ethyl styrene, propyl styrene, vinyl biphenyl, vinyl naphthalene, and vinyl anthracene, and mixtures thereof. Homopolymers and copolymers may have any stereostructure including syndiotactic, isotactic, hemi-isotactic or atactic; where atactic polymers are preferred. Ste- reoblock polymers are also included.

6a. Copolymers including aforementioned vinyl aromatic monomers and comonomers selec- ted from ethylene, propylene, dienes, nitriles, acids, maleic anhydrides, maleimides, vinyl ac- etate and vinyl chloride or acrylic derivatives and mixtures thereof, for example styrene/bu- tadiene, styrene/acrylonitrile, styrene/ethylene (interpolymers), styrene/alkyl methacrylate, styrene/butadiene/alkyl acrylate, styrene/butadiene/alkyl methacrylate, styrene/maleic an- hydride, styrene/acrylonitrile/methyl acrylate; mixtures of high impact strength of styrene co- polymers and another polymer, for example a polyacrylate, a diene polymer or an eth- ylene/propylene/diene terpolymer; and block copolymers of styrene such as styrene/butadi- ene/styrene, styrene/isoprene/styrene, styrene/ethylene/butylene/styrene or styrene/eth- ylene/propylene/styrene. 6b. Hydrogenated aromatic polymers derived from hydrogenation of polymers mentioned un- der 6.), especially including polycyclohexylethylene (PCHE) prepared by hydrogenating atac- tic polystyrene, often referred to as polyvinylcyclohexane (PVCH).

6c. Hydrogenated aromatic polymers derived from hydrogenation of polymers mentioned un- der 6a.).

Homopolymers and copolymers may have any stereostructure including syndiotactic, isotac- tic, hemi-isotactic or atactic; where atactic polymers are preferred. Stereoblock polymers are also included.

7. Graft copolymers of vinyl aromatic monomers such as styrene or α -methylstyrene, for ex- ample styrene on polybutadiene, styrene on polybutadiene-styrene or polybutadiene-acrylo- nitrile copolymers; styrene and acrylonitrile (or methacrylonitrile) on polybutadiene; styrene, acrylonitrile and methyl methacrylate on polybutadiene; styrene and maleic anhydride on polybutadiene; styrene, acrylonitrile and maleic anhydride or maleimide on polybutadiene; styrene and maleimide on polybutadiene; styrene and alkyl acrylates or methacrylates on polybutadiene; styrene and acrylonitrile on ethylene/propylene/diene terpolymers; styrene and acrylonitrile on polyalkyl acrylates or polyalkyl methacrylates, styrene and acrylonitrile on acrylate/butadiene copolymers, as well as mixtures thereof with the copolymers listed under 6), for example the copolymer mixtures known as ABS, MBS, ASA or AES polymers.

8. Halogen-containing polymers such as polychloroprene, chlorinated rubbers, chlorinated and brominated copolymer of isobutylene-isoprene (halobutyl rubber), chlorinated or sulfo- chlorinated polyethylene, copolymers of ethylene and chlorinated ethylene, epichlorohydrin homo- and copolymers, especially polymers of halogen-containing vinyl compounds, for ex- ample polyvinyl chloride, polyvinylidene chloride, polyvinyl fluoride, polyvinylidene fluoride, as well as copolymers thereof such as vinyl chloride/vinylidene chloride, vinyl chloride/vinyl ac- etate or vinylidene chloride/vinyl acetate copolymers.

9. Polymers derived from α,β-unsaturated acids and derivatives thereof such as polyacrylates and polymethacrylates; polymethyl methacrylates, polyacrylamides and polyacrylonitriles, im- pact-modified with butyl acrylate.

10. Copolymers of the monomers mentioned under 9) with each other or with other unsatu- rated monomers, for example acrylonitrile/ butadiene copolymers, acrylonitrile/alkyl acrylate copolymers, aery lo n itri I e/ a I koxya I ky I acrylate or acrylonitrile/vinyl halide copolymers or acry- lonitrile/ alkyl methacrylate/butadiene terpolymers.

11. Polymers derived from unsaturated alcohols and amines or the acyl derivatives or acetals thereof, for example polyvinyl alcohol, polyvinyl acetate, polyvinyl stearate, polyvinyl benzo- ate, polyvinyl maleate, polyvinyl butyral, polyallyl phthalate or polyallyl melamine; as well as their copolymers with olefins mentioned in 1) above.

12. Homopolymers and copolymers of cyclic ethers such as polyalkylene glycols, polyethylene oxide, polypropylene oxide or copolymers thereof with bisglycidyl ethers.

13. Polyacetals such as polyoxymethylene and those polyoxymethylenes which contain eth- ylene oxide as a comonomer; polyacetals modified with thermoplastic polyurethanes, acry- lates or MBS. 14. Polyphenylene oxides and sulfides, and mixtures of polyphenylene oxides with styrene polymers or polyamides.

15. Polyurethanes derived from hydroxyl-terminated polyethers, polyesters or polybutadienes on the one hand and aliphatic or aromatic polyisocyanates on the other, as well as precursors thereof.

16. Polyamides and copolyamides derived from diamines and dicarboxylic acids and/or from aminocarboxylic acids or the corresponding lactams, for example polyamide 4, polyamide 6, polyamide 6/6, 6/10, 6/9, 6/12, 4/6, 12/12, polyamide 11, polyamide 12, aromatic polyamides starting from m-xylene diamine and adipic acid; polyamides prepared from hexamethylene- diamine and isophthalic or/and terephthalic acid and with or without an elastomer as modi- fier, for example poly-2,4,4,-tnmethylhexamethylene terephthalamide or poly-m-phenylene isophthalamide; and also block copolymers of the aforementioned polyamides with polyole- fins, olefin copolymers, ionomers or chemically bonded or grafted elastomers; or with poly- ethers, e.g. with polyethylene glycol, polypropylene glycol or polytetramethylene glycol; as well as polyamides or copolyamides modified with EPDM or ABS; and polyamides condensed during processing (RIM polyamide systems).

17. Polyureas, polyimides, polyamide-imides, polyetherimides, polyesterimides, polyhydan- toins and polybenzimidazoles.

18. Polyesters derived from dicarboxylic acids and diols and/or from hydroxycarboxylic acids or the corresponding lactones or lactides, for example polyethylene terephthalate, polybutyl- ene terephthalate, poly-1, 4-dimethylolcyclohexane terephthalate, polyalkylene naphthalate and polyhydroxybenzoates as well as copolyether esters derived from hydroxyl-terminated polyethers, and also polyesters modified with polycarbonates or MBS. Copolyesters may com- prise, for example - but are not limited to - polybutylenesuccinate/terephtalate, polybutyl - eneadipate/terephthalate, polytetramethyleneadipate/terephthalate, poly butyl ensued nate/- adipate, polybutylensuccinate/carbonate, poly-3-hydroxybutyrate/octanoate copolymer, poly-3-hydroxybutyrate/hexanoate/decanoate terpolymer. Furthermore, aliphatic polyesters may comprise, for example - but are not limited to - the class of poly(hydroxyalkanoates), in particular, poly(propiolactone), poly(butyrolactone), poly(pivalolactone), poly(valerolactone) and poly(caprolactone), polyethylenesuccinate, polypropylenesuccinate, polybutylenesuccin- ate, polyhexamethylenesuccinate, polyethyleneadipate, polypropyleneadipate, poly butyl - eneadipate, polyhexamethyleneadipate, polyethyleneoxalate, polypropyleneoxalate, poly- butyleneoxalate, polyhexamethyleneoxalate, polyethylenesebacate, polypropylenesebacate, polybutylenesebacate and polylactic acid (PLA) as well as corresponding polyesters modified with polycarbonates or MBS. The term "polylactic acid (PLA)" designates a homo-polymer of preferably poly-L-lactide and any of its blends or alloys with other polymers; a co-polymer of lactic acid or lactide with other monomers, such as hydroxy-carboxylic acids, like for example glycolic acid, 3-hydroxy-butyric acid, 4-hydroxy-butyric acid, 4-hydroxy-valeric acid, 5-hydr- oxy-valeric acid, 6-hydroxy-caproic acid and cyclic forms thereof; the terms "lactic acid" or "lactide" include L-lactic acid, D-lactic acid, mixtures and dimers thereof, i.e. L-lactide, D- lactide, meso-lacide and any mixtures thereof.

19. Polycarbonates and polyester carbonates. 20. Polyketones.

21. Polysulfones, polyether sulfones and polyether ketones.

22. Crosslinked polymers derived from aldehydes on the one hand and phenols, ureas and melamines on the other hand, such as phenol/formaldehyde resins, urea/formaldehyde res- ins and melamine/formaldehyde resins.

23. Drying and non-drying alkyd resins.

24. Unsaturated polyester resins derived from copolyesters of saturated and unsaturated dicarboxylic acids with polyhydric alcohols and vinyl compounds as crosslinking agents, and also halogen-containing modifications thereof of low flammability.

25. Crosslinkable acrylic resins derived from substituted acrylates, for example epoxy acry- lates, urethane acrylates or polyester acrylates.

26. Alkyd resins, polyester resins and acrylate resins crosslinked with melamine resins, urea resins, isocyanates, isocyanurates, polyisocyanates or epoxy resins.

27. Crosslinked epoxy resins derived from aliphatic, cycloaliphatic, heterocyclic or aromatic glycidyl compounds, e.g. products of diglycidyl ethers of bisphenol A and bisphenol F, which are crosslinked with customary hardeners such as anhydrides or amines, with or without ac- celerators.

28. Natural polymers such as cellulose, rubber, gelatin and chemically modified homologous derivatives thereof, for example cellulose acetates, cellulose propionates and cellulose bu- tyrates, or the cellulose ethers such as methyl cellulose; as well as rosins and their deriva- tives.

29. Blends of the aforementioned polymers (polyblends), for example PP/EPDM, Polyam- ide/EPDM or ABS, PVC/EVA, PVC/ABS, PVC/MBS, PC/ABS, PBTP/ABS, PC/ASA, PC/PBT, PVC/CPE, PVC/acrylates, POM/thermoplastic PUR, PC/thermoplastic PUR, POM/acrylate, POM/MBS, PPO/HIPS, PPO/PA 6.6 and copolymers, PA/HDPE, PA/PP, PA/PPO, PBT/PC/ABS or PBT/PET/PC.

30. Naturally occurring and synthetic organic materials which are pure monomeric com- pounds or mixtures of such compounds, for example mineral oils, animal and vegetable fats, oil and waxes, or oils, fats and waxes based on synthetic esters (e.g. phthalates, adipates, phosphates or tri me 11 itates) and also mixtures of synthetic esters with mineral oils in any weight ratios, typically those used as spinning compositions, as well as aqueous emulsions of such materials.

31. Aqueous emulsions of natural or synthetic rubber, e.g. natural latex or latices of carbox- ylated styrene/butadiene copolymers.

The organic material is preferably selected from polymers of monoolefins and diolefins, co- polymers of monoolefins and diolefins with each other or with other vinyl monomers, hydro- carbon resins and mixtures of polyalkylenes and starch, polystyrene, poly(p-methylstyrene), poly( α -methylstyrene), graft copolymers of vinyl aromatic monomers such as styrene or α - methylstyrene, halogen-containing polymers, polymers derived from α,β -unsaturated acids and derivatives thereof, polymers derived from unsaturated alcohols and amines or the acyl derivatives or acetals thereof, homopolymers and copolymers of cyclic ethers, Polyphenylene oxides and sulfides, polyurethanes derived from hydroxyl-terminated polyethers, polyesters or polybutadienes on the one hand and aliphatic or aromatic polyisocyanates on the other, polyamides and copolyamides derived from diamines and dicarboxylic acids and/or from ami- nocarboxylic acids or the corresponding lactams, polyureas, polyimides, polyamide-imides, polyetherimides, polyesterimides, polyhydantoins and polybenzimidazoles, polyesters derived from dicarboxylic acids and diols and/or from hydroxycarboxylic acids or the corresponding lactones or lactides, polycarbonates and polyester carbonates, polyketones, polysulfones, polyether sulfones and polyether ketones, crosslinked polymers derived from aldehydes on the one hand and phenols, ureas and melamines on the other hand, drying and non-drying alkyd resins, unsaturated polyester resins derived from copolyesters of saturated and unsatu- rated dicarboxylic acids with polyhydric alcohols and vinyl compounds as crosslinking agents, crosslinkable acrylic resins derived from substituted acrylates, alkyd resins, polyester resins and acrylate resins crosslinked with melamine resins, urea resins, isocyanates, isocyanurates, polyisocyanates or epoxy resins, crosslinked epoxy resins derived from aliphatic, cycloali- phatic, heterocyclic or aromatic glycidyl compounds, natural polymers such as cellulose, rub- ber, gelatin and chemically modified homologous derivatives thereof, aqueous emulsions of natural or synthetic rubber, linear low-density polyethylene, low-density polyethylene, high density polyethylene, ethylene-vinyl acetate copolymer, ethylene-butyl acrylate copolymer, polypropylene homopolymer and polypropylene copolymer.

The stabilizer mixture according to the present invention is present in the organic material to be stabilized in an amount of preferably 0.005 to 10 % or 0.005 to 5 %, in particular 0.01 to 2.5 % or 0.05 to 2 %, relative to the weight of the organic material.

The individual components of the present stabilizer mixture may be added to the organic material to be stabilized either individually or mixed with one another. They can be added to a polymer before, during or after the polymerization or before or after the crosslinking.

The stabilizer mixture according to the present invention or its individual components can be incorporated into the organic material to be stabilized by known methods, for example before or during shaping or by applying the dissolved or dispersed stabilizer to the organic material, if necessary with subsequent evaporation of the solvent. The stabilizers can be added to the organic material in the form of a powder, granules or a masterbatch.

Examples of processing or transformation of the materials stabilized according to the present invention are:

Injection blow molding, extrusion, blow molding, rotomolding, in mold decoration (back injec- tion), slush molding, injection molding, co-injection molding, forming, compression molding, pressing, film extrusion (cast film; blown film), fiber spinning (woven, non-woven), drawing (uniaxial, biaxial), annealing, deep drawing, calandering, mechanical transformation, sinter- ing, coextrusion, coating, lamination, crosslinking (radiation, peroxide, silane), vapor deposi- tion, weld together, glue, vulkanization, thermoforming, pipe extrusion, profile extrusion, sheet extrusion; sheet casting, spin coating, strapping, foaming, recycling / rework, extrusion coat- ing, visbreaking (peroxide, thermal), fiber melt blown, spun bonded, surface treatment (co- rona discharge, flame, plasma), sterilization (by gamma rays, electron beams), cast polymerization (R&M process, RAM extrusion), gel-coating, tape extrusion, GMT-process, SMC-process, plastisol, and dipping (PVC, latex).

In an embodiment, the composition further comprises at least one sterically hindered amine light stabilizer.

The at least one sterically hindered amine light stabilizer is selected from the group consisting of carbonic acid bis(l-undecyloxy-2,2,6,6-tetramethyl-4-piperidyl)ester, bis(2,2,6,6-tetrame- thyl-4-piperidyl)sebacate, bis (2,2,6,6-tetra methyl -4- pi peridyl) succinate, bis(l,2,2,6,6-pen- tamethyl-4-piperidyl)sebacate, bis(l-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)sebacate, bis (1,2, 2,6,6- pen ta methyl -4- pi peridyl) n - butyl -3,5 -di-tert- butyl -4- hydroxy benzyl malonate, the condensate of l-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, linear or cyclic condensates of N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylene- diamine and 4-tert-octylamino-2,6-dichloro-1,3,5-triazine, tris(2,2,6,6-tetramethyl-4-pi- peridyl)nitrilotriacetate, tetra kis (2,2,6,6-tetra methyl -4- pi peridyl) -1,2,3, 4- butanetetracarbox- ylate, 1, G- (1, 2 -ethanediyl)- bis (3, 3, 5, 5 -tetra methyl pi perazi none), 4-benzoyl-2,2,6,6-tetra- m ethyl piperidine, 4-steary I oxy-2,2,6,6-tetra methyl piperidine, bis (1,2, 2,6,6- pen tarn ethyl pi - peridyl) -2- n-buty I -2 -(2 -hydroxy-3,5 -di-tert- butyl benzyl) malonate, 3-n-octyl-7,7,9,9-tetra- methyl-1,3,8-triazaspiro[4.5]decane-2,4-dione, bis (1 -octyl oxy-2,2,6,6-tetra methyl pi - peridyl)sebacate, bis(l-octyloxy-2,2,6,6-tetramethylpiperidyl)succinate, linear or cyclic con- densates of N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylenediamin e and 4-morpho- I i no-2,6-d ich loro-1 ,3,5-triazi ne, the condensate of 2-chloro-4,6-bis(4-n-butylamino-2, 2,6,6- tetramethylpiperidyl)-1,3,5-triazine and l,2-bis(3-aminopropylamino)ethane, the condensate of 2-chloro-4,6-di-(4-n-butylamino-l,2,2,6,6-pentamethylpiperid yl)-1,3,5-triazine and 1,2- bis(3-aminopropylamino)ethane, 8-acetyl -3 -dodecy I -7, 7,9,9 -tetra methy I -1,3,8-tria- zas pi ro [4.5] decane-2, 4-dione, 3-dodecy 1-1 -(2,2,6,6-tetra methyl -4- pi peridyl) pyrrol idine-2,5- dione, 3-dodecyl-l-(l,2,2,6,6-pentamethyl-4-piperidyl)pyrrolidine-2 ,5-dione, a mixture of 4- hexadecyloxy- and 4-stearyloxy-2,2,6,6-tetramethylpiperidine, a condensate of N,N'- bis (2,2,6,6-tetra methyl -4- pi peridyl)hexamethy I enedia mine and 4-cyclohexylamino-2,6-di- chloro-1,3,5-triazine, a condensate of l,2-bis(3-aminopropylamino)ethane and 2,4,6-tri- chloro-1,3,5-triazine and 4-butylamino-2,2,6,6-tetramethylpiperidine; a condensate of 1,6- hexanediamine and 2,4,6-trichloro-l ,3,5-triazi ne as well as N,N-dibutylamine and 4-butyla- mi no-2, 2,6,6-tetramethy I piperidine; N -(2,2,6,6-tetra methyl -4- pi peridyl) -n-dodecy I succi n- imide, N- (1,2, 2,6,6- pen ta methyl -4- pi peridyl)- n-dodecy Isuccinimide, 2-undecyl-7,7,9,9-tetra- methyl-l-oxa-3,8-diaza-4-oxo-spiro[4,5]decane, a reaction product of 7,7,9,9-tetramethyl-2- cycloundecyl-l-oxa-3,8-diaza-4-oxospiro-[4,5]decane and epichlorohydrin, 1, l-bis(l, 2, 2, 6,6- pen ta methyl -4- pi peridyl oxycar bony I) -2- (4- m ethoxy phenyl) et hen e, N,N'-bis-formyl-N,N'- bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylenediamine, a diester of 4-methoxymeth- ylenemalonic acid with l,2,2,6,6-pentamethyl-4-hydroxypiperidine, poly[methylpropyl-3-oxy- 4-(2,2,6,6-tetramethyl-4-piperidyl)]siloxane, a reaction product of maleic acid anhydride- α - olefin copolymer with 2,2,6,6-tetramethyl-4-aminopiperidine or l,2,2,6,6-pentamethyl-4-ami- no piperidine, 2,4-bis[N-(l-cyclohexyloxy-2,2,6,6-tetramethylpiperidine-4-y l)-N-butylamino]- 6-(2-hydroxyethyl)amino-1,3,5-triazine, 1 -(2 -hydroxy-2 -methyl pro poxy) -4-octadecanoy I oxy-

2.2.6.6-tetra methyl piperidine, 5-(2-ethylhexanoyl)oxy methyl -3, 3,5-tri methyl -2-morpho- linone, 5-(2-ethylhexanoyl)oxymethyl-3,3,5-trimethyl-2-morpholinone, the reaction product of 2,4-bis[(l-cyclohexyloxy-2,2,6,6-piperidine-4-yl)butylamino] -6-chloro-s-triazine with N,N’-bis(3-a mi nopropyl) ethylenedia mine), 1,3,5-tris(N-cyclohexyl-N-(2,2,6,6-tetramethylpi- perazine-3-one-4-yl)amino)-s-triazine, 1,3,5-tris(N-cyclohexyl-N-(l,2,2,6,6-pentamethylpi- perazine-3-one-4-yl)amino)-s-triazine, 4-N-butyl-2-N,4-N-bis(2,2,6,6-tetramethylpiperidin- 4-yl)-2-N-[6-[(2,2,6,6-tetramethylpiperidin-4-yl)amino] hexyl] -1,3,5-triazine-2,4-diamine, N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)-N,N'-diformylhexam ethylenediamine, and mixtures thereof.

In a preferred embodiment, the sterically hindered amine light stabilizer is a condensate of

1.6-hexanediamine and 2,4,6-trich loro-1 ,3,5-triazi ne as well as N,N-dibutylamine and 4-bu- tyla mi no-2, 2,6,6-tetra methyl piperidine.

In an embodiment, the composition further comprises at least one compound (C) selected from general formula (I), general formula (II), general formula (III), general formula (IV), and mixtures thereof.

Compound (C) of general formula (I): wherein

A ₁ is selected from linear or branched, substituted or unsubstituted C ₂ -C ₁₈ alkylene, substituted or unsubstituted C ₅ -C ₇ cycloalkylene and C ₁ -C ₄ alkylenedi(C ₅ -C ₇ cyclo alkylene), A ₂ is independently selected from H, linear or branched, substituted or unsubstituted C ₁ -C ₁₂ alkyl, C ₁ -C ₁₂ alkyloxy, substituted or un- substituted C ₅ -C ₁₂ cycloalkyl and C ₅ -C ₁₂ cycloalkyloxy,

A ₃ and A ₄ are independently selected from H, linear or branched, substi tuted or unsubstituted C ₁ -C ₁₂ alkyl, substituted or unsubstituted C ₅ -C ₁₂ cycloalkyl and a group of the formula (a-1), or

A ₃ and A ₄ , together with the nitrogen atom to which they are bonded, form a 5 to 10-membered heterocyclic ring; and a is an integer in the range of 1 to 20 and the repeating units are the same or different.

Within the context of the present invention, the term alkyl, as used herein, refers to acyclic saturated aliphatic residues, including linear or branched alkyl residues.

As used herein, “branched” denotes a chain of atoms with one or more side chains attached to it. Branching occurs by the replacement of a substituent, e.g., a hydrogen atom, with a covalently bonded aliphatic moiety.

Representative examples of linear and branched, unsubstituted C ₁ -C ₁₂ alkyl include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, 2- ethy I butyl , n-pentyl, isopentyl, 1-methylpentyl, 1,3-dimethylbutyl, n-hexyl, 1-methylhexyl, n- heptyl, isoheptyl, 1,1,3,3-tetramethylbutyl, 1-methylheptyl, 3-methylheptyl, 2-propyl heptyl, n-octyl, 2-ethyl hexyl, 1,1,3-trimethyl hexyl , 1,1,3,3-tetramethylpentyl, n-nonyl, n-decyl, n-un- decyl, isoundecyl, 1-methylundecyl, n-dodecyl, isododecyl, and 1,1,3,3,5,5-hexamethylhexyl.

Representative examples of C ₁ -C ₁₂ alkyloxy include, but are not limited to, methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, pentoxy, isopentoxy, hexoxy, heptoxy, octoxy, nonyloxy, decyloxy, undecyloxy, and dodecyloxy.

In a preferred embodiment, alkyloxy is selected from methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, pentoxy, isopentoxy, hexoxy, heptoxy and octoxy. In a more preferred em- bodiment, alkyloxy is propoxy.

Representative examples of C ₅ -C ₁₂ cycloalkyl are cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclononyl, cyclodecyl, cycloundecyl, and cyclododecyl. Representative examples of C ₅ -C ₁₂ cycloalkyloxy are cyclopentoxy, cyclohexoxy, cycloheptoxy, cyclooctoxy, cyclononyloxy, cyclodecyloxy, cycloundecyloxy, and cyclododecyloxy.

In a preferred embodiment the cylcoalkyloxy is cyclohexoxy.

A preferred example of phenyl substituted by 1, 2 or 3 C ₁ -C ₄ a I ky I is 2,4-dimethylphenyl. Preferred C ₂ -C ₁₈ alkylene are ethylene, propylene, trimethylene, tetramethylene, pentameth- ylene, 2,2-dimethyltrimethylene and hexamethylene. In a more preferred embodiment, al- kylene is hexamethylene.

An example of C ₅ -C ₇ cycloalkylene is cyclohexylene.

An example of C ₁ -C ₄ alkylenedi(C ₅ -C ₇ cycloalkylene) is methylenedicyclohexylene. Examples of the radicals A ₃ and A ₄ together with the nitrogen atom to which they are bonded, forming a 5- to 10-membered heterocyclic ring, are 1-pyrrolidyl, piperidyl, morpholinyl, 1-pi- perazinyl, 4-methyl-l-piperazinyl, 1-hexahydroazepinyl, 5,5,7-trimethyl-l-homopiperazinyl or 4,5,5,7-tetramethyl-l-homopiperazinyl, preferably morpholinyl.

In the compound (A) of the general formula (I) the terminal group attached to the diamino residue is for example hydrogen or a group of the formula and the terminal group attached to the triazine radical is for example a group of the formula or a group of the formula

In a preferred embodiment, A ₄ is hexamethylene, and A ₂ is hydrogen, and propoxy. In a preferred embodiment, A ₃ is butyl,

, and

In a preferred embodiment, A ₄ is butyl.

In a preferred embodiment, a is an integer in the range of 1 to 10.

Compound (C) of general formula (II): wherein x ₁ and x ₂ is independently selected from C ₁ to C ₃₀ alkoxy,

In a preferred embodiment, x ₁ and x ₂ are independently selected from linear or branched, unsubstituted C ₁ to C ₃₀ alkyloxy. Representative examples of linear or branched, unsubstituted C ₁ to C ₃₀ alkyloxy are methyloxy, ethyloxy, propyloxy, butyloxy, pentyloxy, hexyloxy, heptyloxy, octyloxy, nonyloxy, decyloxy, undecyloxy, dodecyloxy, tridecyloxy, tetradecyloxy, pentadecyloxy, hexadecyloxy, heptadecyloxy, octadecyloxy, nonadecyloxy, icosyloxy, henicosyloxy, docosyloxy, tricosyloxy, tetracosyloxy, pentacosyloxy, hexacosyloxy, heptacosyloxy, octacosyloxy, nonacosyloxy and triacontyloxy.

In a preferred embodiment, x ₁ and x ₂ are each undecyloxy.

Compound (C) of general formula (III):

wherein

Y ₁ is linear or branched, substituted or unsubstituted C ₃ to C ₂₀ alkyl,

Y2 is C ₁ to C ₃₀ alkyl; and In a preferred embodiment, Y ₁ is linear or branched, unsubstituted C ₃ to C ₂₀ alkyl.

In an embodiment, Y ₁ is selected from the group consisting of methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hex- adecyl, heptadecyl, octadecyl, nonadecyl, and icosyl.

In a preferred embodiment, Y ₁ is selected from propyl, and dodecyl. In a preferred embodiment, Y ₂ is linear or branched, unsubstituted C ₁ to C ₃₀ alkyl.

In an embodiment, Y ₂ is selected from the group consisting of methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hex- adecyl, heptadecyl, octadecyl, nonadecyl, icosyl, henicosyl, docosyl, tricosyl, tetracosyl, pen- tacosyl, hexacosyl, heptacosyl, octacosyl, nonacosyl, and triacontyl. In a preferred embodiment, Y ₂ is selected from pentadecyl, and heptadecyl.

Compound (C) of general formula (IV): wherein Y ₁ is linear or branched, substituted or unsubstituted C ₃ to C ₂₀ alkyl,

Y ₃ is independently selected from linear or branched, substituted or un substituted C ₃ to C ₂₀ alkyl, and C ₃ to C ₂₀ alkylidene, X is C ₂ to C ₅ alkyl, n is an integer in the range of 1 to 8.

In a preferred embodiment, Y ₃ is selected from linear or branched, unsubstituted C ₃ to C ₂₀ alkyl and C ₃ to C ₂₀ alkylidene.

Representative examples of alkylidene having up to 20 carbon atoms are methylidene, ethyl- idene, propylidene, butylidene, pentylidene, hexylidene, heptylidene, octylidene, nonylidene, decylidene, undecylidene, dodecylidene, tridecylidene, tetradecylidene, pentadecylidene, hexadecylidene, heptadecylidene, octadecylidene, nonadecylidene, and icosylidene. In a preferred embodiment, Y ₁ is selected from decyl.

In a preferred embodiment, Y ₃ is selected from decyl, and nonylidene.

In a preferred embodiment, the compound (C) is selected from the formulae (C-l), (C- II), (C- III), (C-IV), (C-V), (C-VI), (C-VII), and (C-VIII). wherein a is an integer in the range of 1 to 10; and

wherein n is 2. In an embodiment, the composition further comprises at least one additive selected from the slip agents, anti-block agents, thermal fillers, pigments, anti-fog and anti-mist agents.

In an embodiment, the composition further comprises metal hydroxide as fillers and/or acid scavengers.

The composition may additionally also contain various conventional additives, for example:

1. Antioxidants

1.1. Alkylated monophenols, for example 2,6-di-tert-butyl-4-methylphenol, 2-tert-butyl-4,6- dimethylphenol, 2,6-di-tert-butyl-4-ethylphenol, 2,6-di-tert-butyl-4-n-butylphenol, 2,6-di- tert- butyl -4- iso butyl phenol, 2,6-dicyclopentyl-4-methylphenol, 2 -(α - methyl cyclo hexyl) -4,6- dimethylphenol, 2,6-dioctadecyl-4-methylphenol, 2,4,6-tricyclohexyl phenol , 2,6-di-tert-butyl- 4-methoxymethylphenol, nonylphenols which are linear or branched in the side chains, for example, 2,6-di-nonyl-4-methylphenol, 2,4-dimethyl-6-(r-methylundec-l'-yl)phenol, 2, 4-di- methyl -6-(l'-methy I heptadec-l'-yl) phenol, 2,4-dimethyl-6-(r-methyltridec-l'-yl)phenol and mixtures thereof.

1.2. Alkylthiomethylphenols, for example 2,4-dioctylthiomethyl-6-tert-butylphenol, 2,4-di- octy I thio methyl -6- methyl phenol, 2,4-dioctylthiomethyl -6-ethyl phenol, 2,6-di-dodecylthiome- thyl-4-nonylphenol.

1.3. Hydroquinones and alkylated hydroquinones, for example 2,6-di-tert-butyl-4-methoxy- phenol, 2,5-di-tert-butylhydroquinone, 2,5-di-tert-amylhydroquinone, 2,6-diphenyl-4-octade- cyloxyphenol, 2,6-di-tert-butylhydroquinone, 2,5-di-tert-butyl-4-hydroxyanisole, 3,5-di-tert- butyl-4-hydroxyanisole, 3,5-di-tert-butyl-4-hydroxyphenyl stearate, bis(3,5-di-tert-butyl-4- hydroxyphenyl) adipate.

1.4. Tocopherols, for example α -tocopherol, b-tocopherol, g-tocopherol, d-tocopherol and mixtures thereof (vitamin E).

1.5. Hydroxylated thiodiphenyl ethers, for example 2,2'-thiobis(6-tert-butyl-4-methylphenol), 2,2'-thio bis (4-octyl phenol), 4, 4'-thiobis(6-tert- butyl -3 -methyl phenol), 4, 4'-thio bis (6-tert- bu- tyl -2- methyl phenol), 4, 4'-thiobis(3,6-di -sec-amyl phenol), 4, 4'- bis (2,6-dimethyl -4- hydroxy- phenyl)disulfide.

1.6. Alkylidenebisphenols, for example 2,2'-methylenebis(6-tert-butyl-4-methylphenol), 2,2'- methylenebis (6-tert- butyl -4-ethyl phenol), 2, 2'- methylenebis [4- methyl -6- (α - methyl cyclo- hexyl) phenol], 2,2'-methylenebis(4-methyl-6-cyclohexylphenol), 2,2'-methylenebis(6-nonyl- 4- methyl phenol), 2,2'- methylenebis(4,6-di-tert-buty I phenol), 2,2'-ethylidenebis(4,6-di-tert- butylphenol), 2,2'-ethy I id ene bis (6-tert- butyl -4- iso butyl phenol), 2,2'-methylenebis[6-(α - methylbenzyl)-4-nonylphenol], 2,2'-methylenebis[6-(a,α -dimethylbenzyl)-4-nonylphenol], 4,4'-methylenebis(2,6-di-tert-butylphenol), 4,4'- methylenebis (6-tert- butyl -2 -methyl phenol), 1 , 1 - bis (5 -tert- butyl -4- hydroxy-2 -methyl phenyl) butane, 2,6- bis (3 -tert- butyl -5 -methyl -2 -hy- droxy benzyl) -4- methyl phenol, l,1,3-tris(5-tert-buty I -4- hydroxy-2 -methyl phenyl) butane, 1,1- bis(5-tert- butyl -4- hydroxy-2- methyl- phenyl) -3-n-dodecy I mercapto butane, ethylene glycol bis [3,3 - bis (3'-tert- butyl -4'- hydroxy phenyl) butyrate], bis(3-tert-butyl-4-hydroxy-5-methyl- phenyl) dicyclopentadiene, bis [2 -(3'-tert- butyl -2'- hydroxy-5'- methyl benzyl) -6-tert- butyl -4- methyl phenyl] terephtha late, 1,1 -bis- (3, 5 -dimethyl -2 -hydroxy phenyl) butane, 2,2-bis(3,5-di- tert- butyl -4- hydroxy phenyl) pro pane, 2,2-bis(5-tert-butyl-4-hydroxy2-methylphenyl)-4-n-do- decylmercaptobutane, 1 , 1 ,5,5 -tetra - (5 -tert- buty 1-4- hydroxy-2 -methyl phenyl) pentane.

1.7. 0-, N- and S-benzyl compounds, for example 3,5,3',5'-tetra-tert-butyl-4,4'-dihyd roxyd i - benzyl ether, octadecyl-4-hydroxy-3,5-dimethylbenzylmercaptoacetate, tridecyl-4-hydroxy- 3,5-di-tert-butylbenzylmercaptoacetate, tris(3,5-di-tert-butyl-4-hydroxybenzyl)amine, bis (4- tert-butyl-3-hydroxy-2,6-dimethylbenzyl)dithioterephthalate, bis (3,5 -di -tert- buty I -4- hy- droxy benzyl) sulfide, isooctyl -3,5 -di -tert- buty I -4- hydroxy benzyl me rcaptoacetate.

1.8. Hydroxybenzylated malonates, for example d ioctad ecy I -2 ,2- bis(3,5-di-tert-butyl-2-hy- droxybenzyl)malonate, di-octadecyl-2-(3-tert-butyl-4-hydroxy-5-methylbenzyl)malona te, di- dodecylmercaptoethyl-2,2-bis (3,5-di-tert- butyl-4- hydroxybenzyl)malonate, bis[4-(l,1,3,3- tetra methyl butyl) phenyl] -2,2- bis (3,5 -di -tert- buty I -4- hydroxy benzyl) ma I on ate.

1.9. Aromatic hydroxybenzyl compounds, for example l,4-bis(3,5-di-tert-butyl-4-hydroxyben- zyl) -2, 3,5,6-tetra methyl benzene, 2, 4,6-tris (3,5-di-tert- buty I -4- hydroxy benzyl) phenol.

1.10. Triazine compounds, for example 2,4-bis(octylmercapto)-6-(3,5-di-tert-butyl-4-hydrox- ya ni I i no) -1 ,3,5-triazi ne, 2 -octyl mercapto-4,6- bis (3,5 -d i -tert- buty I -4- hyd roxya n i I i no) -1,3,5 - triazine, 2-octylmercapto-4,6-bi(3,5-di-tert-butyl-4-hydroxyphenoxy)-1 ,3,5-triazine, 2, 4,6- tris (3,5-di-tert- buty I -4- hydroxy p he noxy)- 1,2,3 -triazine, 1,3,5-tris(4-tert-butyl -3 - hyd roxy-2,6- di methyl benzyl) isocyan urate, 2, 4,6-tris (3,5-di-tert- buty I -4- hydroxy phenyl ethyl) -1,3,5 -tria- zine, 1,3,5 -tris (3,5 -d i -te rt- buty I -4- hyd roxy p he ny I propionyl)-hexa hydro- 1,3,5 -triazine, 1,3,5- tris (3,5 -d icyc I o hexyl -4- hydroxy benzyl) isocyan urate.

1.11. Benzylphosphonates, for example dimethyl-2, 5-di-tert-butyl-4-hydroxybenzylphospho- nate, diethyl-3,5-di-tert-butyl-4-hydroxybenzylphosphonate, d ioctad ecy 13,5 -di -tert- buty 1-4- hydroxy benzyl phosph on ate, d ioctadecy I -5 -tert- buty I -4- hydroxy-3 -methyl benzyl ph os pho- nate, the calcium salt of the monoethyl ester of 3,5-di-tert-butyl-4-hydroxybenzylphosphonic acid.

1.12. Acylaminophenols, for example 4-hydroxylauranilide, 4-hydroxystearanilide, octyl N- (3,5 -di -tert- buty I -4- hyd roxy phenyl) car bam ate.

1.13. Esters of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid with mono- or polyhydric alcohols, e.g. with methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexanediol, 1,9- nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethy- lene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'-bis(hy- droxyethyl)oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylol- propane, 4-hydroxymethyl-l-phospha-2,6,7-trioxabicyclo [2.2.2] octane.

1.14. Esters of β-(5-tert-butyl-4-hydroxy-3-methylphenyl)propionic acid with mono- or poly- hydric alcohols, e.g. with methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexanedi- ol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'-bis- (hydroxyethyl)oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, tri methyl - ol propane, 4-hydroxymethyl-l-phospha-2,6,7-trioxabicyclo[2.2.2]octane; 3, 9 -bis [2 -{3 -(3- tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]-l,l-dimeth ylethyl]-2,4,8,10- tetraoxas pi ro [5.5] undecane.

1.15. Esters of β-(3,5-dicyclohexyl-4-hydroxyphenyl)propionic acid with mono- or polyhydric alcohols, e.g. with methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, tri- ethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'-bis(hydroxyethyl)ox- amide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hy- droxymethyl-l-phospha-2,6,7-trioxabicyclo[2.2.2] octane.

1.16. Esters of 3,5-di-tert-butyl-4-hydroxyphenyl acetic acid with mono- or polyhydric alco- hols, e.g. with methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, eth- ylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, trieth- ylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'-bis(hydroxyethyl)oxamide,

3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hy- droxymethyl-l-phospha-2,6,7-trioxabicyclo[2.2.2] octane.

1.17. Amides of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid e.g. N , N'- bis(3,5-d i-tert- butyl-4-hydroxyphenylpropionyl)hexamethylenediamide, N, N'- bis (3,5 -di-tert- butyl -4- hy- droxy phenyl pro piony I) tri methyl enediamide, N, N'- bis (3,5 -di-tert- butyl -4- hydroxy phenyl pro pi- ony l)hydrazide, N, N'- bis [2 -(3 -[3, 5 -di-tert- butyl -4- hydroxy phenyl] pro piony I oxy) ethyl] ox- amide (Naugard ^® XL-l, supplied by Uniroyal).

1.18. Ascorbic acid (vitamin C)

1.19. Aminic antioxidants, for example N,N'-di-isopropyl-p-phenylenediamine, N,N'-di-sec- butyl-p-phenylenediamine, N,N'-bis(l,4-di methyl pentyl) -p-phenylenediamine, N,N'-bis(l- ethyl-3-methylpentyl)-p-phenylenediamine, N,N'-bis(l- methyl heptyl) -p-phenylenediamine, N,N'-dicyclohexy I -p-phenylenediamine, N,N'-diphenyl-p-phenylenediamine, N,N'-bis(2- naphthy I) - p-phenylenediamine, N-isopropyl-N'-phenyl-p-phenylenediamine, N-(l, 3 -dime- thyl butyl)-N'-phenyl -p-phenylenediamine, N -(1- methyl heptyl) -N'- phenyl - p- phenyl enedia- mine, N -cyclohexy I -N'- phenyl -p-phenylenediamine, 4-(p-toluenesulfamoyl)diphenylamine, N, N'-d imethy I -N,N'-di-sec-buty I -p-phenylenediamine, diphenylamine, N-allyldiphenylamine,

4-isopropoxydiphenylamine, N-phenyl-l-naphthyl amine, N -(4-tert-octy I phenyl) -1- naphthyl - amine, N-phenyl-2-naphthylamine, octylated diphenylamine, for example r,r'-di-tert-octyldi- phenylamine, 4-n-butylaminophenol, 4-butyrylaminophenol, 4-nonanoylaminophenol, 4-do- decanoylaminophenol, 4-octadecanoylaminophenol, bis(4-methoxyphenyl)amine, 2,6-di-tert- butyl-4-dimethylaminomethyl phenol, 2,4'-diami nodiphenyl methane, 4,4'-diaminodi phenyl - methane, N, N,N',N'-tetra methyl -4, 4'-diami nodiphenyl methane, 1,2 -bis [(2- methylphenyl)amino]ethane, l,2-bis(phenylamino)propane, (o-tolyl)biguanide, bis [4- (1',3'- dimethylbutyl)phenyl]amine, tert-octylated N-phenyl-l-naphthylamine, a mixture of mono- and dial kylated tert-butyl/tert-octyldiphenylamines, a mixture of mono- and dial kylated nonyldiphenylamines, a mixture of mono- and dial ky I ated dodecyldiphenylamines, a mixture of mono- and dial ky I ated isopropyl/isohexyldiphenylamines, a mixture of mono- and dial kyl- ated tert-butyldiphenylamines, 2,3-dihydro-3,3-dimethyl-4H-l,4-benzothiazine, phenothia- zine, a mixture of mono- and dial kylated tert-butyl/tert-octylphenothiazines, a mixture of mono- and dial kylated tert-octyl-phenothiazines, N-allylphenothiazine, N,N,N',N'-tetra- phenyl-l,4-diaminobut-2-ene. 2. UV absorbers and light stabilizers

2.1. 2-(2'-Hydroxyphenyl)benzotriazoles, for example 2-(2'-hydroxy-5'-methylphenyl)-benzo- triazole, 2-(3',5'-di-tert-butyl-2'-hydroxyphenyl)benzotriazole, 2 -(5'-tert- buty I -2'- hydroxy- phenyl) be nzotriazole, 2 - (2'- hydroxy-5'-(l,1,3,3-tetra methyl butyl) phenyl) be nzotriazole, 2- (3 ^, ,5'-di-tert-butyl-2'-hydroxyphenyl)-5-chloro-benzotria zole, 2-(3'-tert-butyl-2'-hydroxy-5'- methy I phenyl) -5-chloro-benzotriazole, 2 -(3'-sec- butyl -5'-tert- butyl -2'- hydroxy phenyl) ben - zotriazole, 2 - (2'- hydroxy-4'-octy I oxy phenyl) be nzotriazole, 2-(3',5'-di-tert-amyl-2'-hydroxy- p he nyl) be nzotriazole, 2- (3', 5'- bis- (a, α -di methyl benzyl) -2'- hydroxy phenyl) be nzotriazole, 2- (3'-tert-buty I -2'- hydroxy-5'-(2-octyloxycarbonylethyl) phenyl) -5-chloro-benzotriazole, 2-(3'- tert- butyl -5'- [2- (2-ethy I hexyl oxy) -car bo nyl ethyl] -2'- hydroxy phenyl) -5-chloro-benzotriazole,

2 - (3'-tert- buty I -2'- hyd roxy-5'- (2 -methoxycar bo nyl ethyl) phenyl) -5-chloro-benzotriazole, 2- (3'-te rt- bu ty I -2'- hydroxy-5'- (2 -methoxycar bo nyl ethyl) phenyl) be nzotriazole, 2-(3'-tert-butyl- 2'-hydroxy-5'-(2-octyloxycarbonylethyl)phenyl)benzotriazole, 2-(3'-tert- butyl -5'- [2- (2- ethylhexyloxy)carbonylethyl]-2'-hydroxyphenyl)benzotriazole, 2-(3'-dodecyl-2'-hydroxy-5'- m ethyl phenyl) be nzotriazole, 2 -(3'-tert- buty I -2'- hyd roxy-5'- (2 -isooctyl oxycarbo nyl ethyl) phe- nyl be nzotriazole, 2, 2'- methyl ene- bis [4- (1,1,3,3-tetra methyl butyl) -6- benzotriazo I e-2-y I phe- nol]; the transesterification product of 2-[3'-tert-butyl-5'-(2-methoxycarbonylethyl)-2'-hy- droxyphenyl]-2H-benzotriazole with polyethylene glycol 300; , where R = 3'-tert-butyl-4'-hydroxy-5'-2H-benzotriazol-2- y I phenyl, 2 -[2'- hydroxy-3'- (a, α -di methyl benzyl) -5'- (1,1,3,3-tetra methyl butyl) -phenyl] ben- zotriazo I e; 2 -[2'- hydroxy-3'- (1,1,3,3-tetra methyl butyl) -5'- (a, α -di methyl benzyl) -phenyl] ben- zotriazole.

2.2. 2-Hydroxybenzophenones, for example the 4-hydroxy, 4-methoxy, 4-octyloxy, 4-decyloxy, 4-dodecyloxy, 4-benzyloxy, 4,2',4'-trihydroxy and 2'-hydroxy-4,4'-dimethoxy derivatives.

2.3. Esters of substituted and unsubstituted benzoic acids, for example 4-tert-butyl-phenyl salicylate, phenyl salicylate, octylphenyl salicylate, dibenzoyl resorcinol, bis(4-tert-butylben- zoyl)resorcinol, benzoyl resorcinol, 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzo- ate, hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate, octadecyl 3,5-d i-tert- buty I -4- hy- droxy benzoate, 2-methyl-4,6-di-tert-butylphenyl 3,5-d i-tert- buty I -4- hydroxy benzoate.

2.4. Acrylates, for example ethyl α -cyano-β,β-diphenylacrylate, isooctyl α -cyano-p,β-diphe- nylacrylate, methyl α -carbomethoxycinnamate, methyl α -cyano-β-methyl-p-methoxycinna- mate, butyl α -cyano-β-methyl-p-methoxy-cinnamate, methyl α -carbomethoxy-p- methoxycinnamate, N-(β-carbomethoxy-β-cyanovinyl)-2-methylindoline, neopentyl tetra(α - cyano-β,β-diphenylacrylate.

2.5. Nickel compounds, for example nickel complexes of 2,2'-th io- bis [4- (1, 1,3,3-tetra methyl - butyl)phenol], such as the 1:1 or 1:2 complex, with or without additional ligands such as n- butylamine, triethanolamine or N-cyclohexyldiethanolamine, nickel dibutyldithiocarbamate, nickel salts of the monoalkyl esters, e.g. the methyl or ethyl ester, of 4-hydroxy-3,5-di-tert- butylbenzylphosphonic acid, nickel complexes of ketoximes, e.g. of 2-hydroxy-4-methylphe- nylundecylketoxime, nickel complexes of l-phenyl-4-lauroyl-5-hydroxypyrazole, with or with- out additional ligands. 2.6. Oxamides, for example 4,4'-dioctyloxyoxanilide, 2,2'-diethoxyoxanilide, 2,2'-dioctyloxy- 5,5'-di-tert-butoxanilide, 2,2'-didodecyloxy-5,5'-di-tert-butoxanilide, 2-ethoxy-2'-ethyloxani- lide, N,N'-bis(3-dimethylaminopropyl)oxamide, 2-ethoxy-5-tert-butyl-2'-ethoxanilide and its mixture with 2-ethoxy-2'-ethyl-5,4'-di-tert-butoxanilide, mixtures of o- and p-methoxy-disub- stituted oxanilides and mixtures of o- and p-ethoxy-disubstituted oxanilides.

2.7. 2-(2-Hydroxyphenyl)-1,3,5-triazines, for example 2,4,6-tris(2-hydroxy-4-octyloxyphenyl)-

1,3,5-triazine, 2 - (2,4-d i hydroxy phenyl) -4,6- bis (2,4-d i methyl phenyl)- 1,3,5 -triazine, 2,4-bis(2- hydroxy-4-propyloxyphenyl)-6-(2,4-dimethylphenyl)-1,3,5-tria zine, 2-(2-hydroxy-4-octyloxy- phenyl) -4,6- bis (4- methyl phenyl) -1,3,5 -triazine, 2-(2-hydroxy-4-dodecyloxyphenyl)-4,6- bis (2, 4-dimethyl phenyl) -1,3,5 -triazine, 2 -(2- hydroxy-4-tridecy I oxy phenyl) -4,6- bis (2,4-d i me- thyl phenyl) -1,3,5 -triazine, 2 - [2 - hyd roxy-4- (2 - hydroxy-3 -buty I oxy propoxy) phenyl] -4,6- bis (2, 4-dimethyl) -1,3,5 -triazine, 2 -[2 -hyd roxy-4- (2 -hydroxy-3 -octyl oxy pro py I oxy) p he nyl]-

4,6- bis (2, 4-dimethyl) -1,3,5 -triazine, 2 -[4- (dodecy I oxy/tridecy I oxy-2- hydroxy pro poxy) -2 -hy- droxy phenyl] -4,6- bis (2, 4-dimethyl phenyl) -1,3,5 -triazine, 2-[2-hydroxy-4-(2-hydroxy-3-do- decy I oxy pro poxy) phenyl] -4,6- bis (2, 4-dimethyl phenyl) -1,3,5 -triazine, 2 -(2 -hyd roxy-4-m eth- oxy phenyl) -4,6-di phenyl -1,3,5 -triazine, 2, 4,6-tris [2 -hydroxy-4- (3- butoxy-2- hydroxy pro- poxy) phenyl] -1,3,5-triazine, 2 -(2 -hydroxy phenyl) -4- (4- meth oxy phenyl) -6- phenyl -1,3,5 -tria- zine, 2-{2- hyd roxy-4-[3-(2-ethyl hexyl -1 -oxy) -2-hydroxypropyloxy]phenyl]-4,6-bis(2, 4-dime- thy I phenyl) -1,3,5 -triazine, 2, 4- bis (4- [2 -ethyl hexyl oxy] -2 -hydroxy phenyl) -6- (4- meth oxy phe- nyl)- 1,3,5-triazine.

3. Metal deactivators, for example N,N'-diphenyloxamide, N-salicylal-N'-sal icy I oy I hydrazine,

N, N'- bis (sal icy I oyl) hydrazine, N, N'- bis (3,5-di-tert- butyl -4- hydroxy phenyl pro pionyl) hydra- zine, 3-salicyloylamino-l, 2, 4-triazole, bis(benzylidene)oxalyl dihydrazide, oxanilide, isophthaloyl dihydrazide, sebacoyl bisphenylhydrazide, N,N'-diacetyladipoyl dihydrazide, N,N'-bis(salicyloyl)oxalyl dihydrazide, N,N'-bis(sal icy I oy I) th iop ropio ny I dihydrazide.

4. Phosphites and phosphonites, for example triphenyl phosphite, diphenylalkyl phosphites, phenyl dia I kyl phosphites, tris(nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phos- phite, distearylpentaerythritol diphosphite, tris(2,4-di-tert-butylphenyl) phosphite, diisodecyl pentaerythritol diphosphite, bis(2,4-di-tert-butylphenyl) pentaeryth ritol diphosphite, bis (2,4- di-cumyl phenyl) pentaerythritol di phosphite, bis(2,6-di-tert- butyl -4- methyl phenyl) pentae- rythritol diphosphite, diisodecyloxypentaerythritol diphosphite, bis(2,4-di-tert-butyl-6- methylphenyl)pentaerythritol diphosphite, bis(2,4,6-tris(tert-buty I phenyl) pentaeryth ritol di- phosphite, tristearyl sorbitol triphosphite, tetrakis(2,4-di-tert-butylphenyl) 4,4'-biphenylene diphosphonite, 6- isooctyl oxy-2, 4,8, 10-tetra-tert- butyl -12 H-dibenz[d,g] -1,3,2-d ioxaphospho- cin, bis(2,4-di-tert-butyl-6-methylphenyl)methyl phosphite, bis(2,4-di-tert-butyl-6- m ethyl phenyl) ethyl phosphite, 6-fluoro-2,4,8,10-tetra-tert-butyl-12-methyl-dibenz[d,g]- 1,3,2-dioxaphosphocin, 2,2',2"-nitrilo[triethyltris (3 ,3',5 ,5'-tetra -tert- buty I -l,l'-biphenyl-2,2'- diyl) phosphite], 2-ethy I hexyl (3,3',5,5'-tetra-tert- buty I -1 , l'-bi pheny I -2,2'-d iyl) phosphite, 5- butyl-5-ethyl-2-(2,4,6-tri-tert-butylphenoxy)-1,3,2-dioxapho sphirane, phosphorous acid, mixed 2,4-bis(l,l-dimethylpro py I) phenyl and 4-(l,l-dimethylpropyl)phenyl triesters (CAS: 939402-02-5)., phosphorous acid, triphenyl ester, polymer with α -hydro-ω - hydroxypoly[oxy(methyl-l,2-ethanediyl)], C10-16-al kyl esters (CAS: 1227937-46-3).

The following phosphites are especially preferred: T ris(2,4-di-tert-butylphenyl) phosphite (lrgafos ^® 168, Ciba Specialty Chemicals Inc.), tris(no- nyl phenyl) phosphite,

5. Hydroxylamines, for example N,N-dibenzylhydroxylamine, N,N-diethylhydroxylamine, N,N- dioctylhydroxylamine, N,N-dilaurylhydroxylamine, N,N-ditetradecylhydroxylamine, N , N -d i- hexadecyl hydroxy la mine, N,N-dioctadecy I hydroxy la mine, N-hexadecyl-N-octadecyl hydroxyl- amine, N-heptadecyl-N-octadecylhydroxylamine, N,N-dialkylhydroxylamine derived from hy- drogenated tallow amine.

6. Nitrones, for example, N-benzyl-alpha-phenylnitrone, N-ethyl-alpha-methylnitrone, N-oc- tyl-alpha-heptylnitrone, N-lauryl-alpha-undecylnitrone, N-tetradecyl-alpha-tridecyln nitrone, N-hexadecyl-alpha-pentadecylnitrone, N-octadecyl-alpha-heptadecylnitrone, N-hexadecyl- alpha-heptadecylnitrone, N-ocatadecyl-alpha-pentadecylnitrone, N-heptadecyl-alpha-hep- tadecylnitrone, N-octadecyl-alpha-hexadecylnitrone, nitrone derived from N , N -d ia I ky I hyd rox- ylamine derived from hydrogenated tallow amine.

7. Thiosynergists, for example dilauryl thiodipropionate, dimistryl thiodipropionate, pentae- rythritol tetrakis[3-(dodecylthio) propionate], distearyl thiodipropionate or distearyl disulfide.

8. Peroxide scavengers, for example esters of b-thiodipropionic acid, for example the lauryl, stearyl, myristyl or tridecyl esters, mercaptobenzimidazole or the zinc salt of 2-mercaptoben- zimidazole, zinc dibutyldithiocarbamate, dioctadecyl disulfide, pentaerythritol tetrakis(β-do- decylmercapto) propionate.

9. Polyamide stabilizers, for example copper salts in combination with iodides and/or phos- phorus compounds and salts of divalent manganese.

10. Basic co-stabilizers, for example melamine, polyvinylpyrrolidone, dicyandiamide, trial lyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts and alkaline earth metal salts of higher fatty acids, for example calcium stearate, zinc stearate, magnesium behenate, magnesium stearate, sodium ricinoleate and potassium palmitate, antimony pyrocatecholate or zinc pyrocatecholate.

11. Nucleating agents, for example inorganic substances, such as talcum, metal oxides, such as titanium dioxide or magnesium oxide, phosphates, carbonates or sulfates of, preferably, alkaline earth metals; organic compounds, such as mono- or polycarboxylic acids and the salts thereof, e.g. 4-tert-butylbenzoic acid, adipic acid, diphenylacetic acid, sodium succinate or sodium benzoate; polymeric compounds, such as ionic copolymers (ionomers). Especially preferred are 1,3:2,4- bis(3’,4’-d imethy I benzyl idene) sorbitol , 1,3:2,4-d i (pa ra methy Id ibenzy I i- dene)sorbitol, and 1,3:2,4-di (benzyl idene) sorbitol . 12. Fillers and reinforcing agents, for example calcium carbonate, silicates, surface treated silica (as described e.g. in US-A-2007/60,697 and US-A-2009/111,918), glass fibres, glass beads, asbestos, talc, kaolin, mica, barium sulfate, metal oxides and hydroxides, carbon black, graphite, wood flour and flours or fibers of other natural products, synthetic fibers.

The preferred metal hydroxide is magnesium aluminum hydroxycarbonate.

13. Other additives, for example plasticisers, lubricants, emulsifiers, pigments, rheology ad- ditives, catalysts, flow-control agents, optical brighteners, flameproofing agents, antistatic agents and blowing agents. Additionally, acid scavengers can also be used.

The preferred acid scavenger is magnesium aluminum hydroxycarbonate.

14. Benzofuranones and indolinones, for example those disclosed in U.S. 4,325,863; U.S. 4,338,244; U.S. 5,175,312; U.S. 5,216,052; U.S. 5,252,643; DE-A-4316611;

DE-A-4316622; DE-A-4316876; EP-A-0589839, EP-A-0591102; EP-A-1291384 or 3-[4-(2- acetoxyethoxy)phenyl]-5,7-di-tert-butylbenzofuran-2-one, 5,7-di-tert-butyl-3-[4-(2-stea- royloxyethoxy)phenyl]benzofuran-2-one, 3,3'-bis[5,7-di-tert-butyl-3-(4-[2 - hyd roxyeth - oxy]phenyl)benzofuran-2-one], 5,7 -d i -tert- buty I -3 - (4-ethoxy phenyl) be nzofu ran -2 -one, 3-(4- acetoxy-3,5-dimethylphenyl)-5,7-di-tert-butylbenzofuran-2-on e, 3-(3,5-dimethyl-4-pivalo- yloxyphenyl)-5,7-di-tert-butylbenzofuran-2-one, 3 -(3,4-dimethyl phenyl) -5,7 -di -tert- bu- ty I benzofu ran -2 -one, 3-(2,3-dimethylphenyl)-5,7-di-tert-butylbenzofuran-2-one, 3 -(2 -ace- tyl -5 -isooctyl phenyl) -5 -isooctyl benzofu ran -2 -one.

The weight ratio of the present stabilizer mixture to the total amount of the conventional additive(s) can be for example 100:1 to 1:1000 or 10:1 to 1:100 or 20 to 1 to 1 to 20 or 10:1 to 1:10.

The materials stabilized according to this invention can be used in a wide variety of forms, for example as films, fibres, tapes, moulding compositions, profiles or as binders for paints, adhesives or putties.

In more detail, the materials stabilized according to the present invention may be used for the preparation of the following devices:

1-1) Automotive applications, in particular bumpers, dashboards, battery, rear and front lin- ings, moldings parts under the hood, hat shelf, trunk linings, interior linings, air bag covers, electronic moldings for fittings (lights), panes for dashboards, headlamp glass, instrument panel, exterior linings, upholstery, automotive lights, head lights, parking lights, rear lights, stop lights, interior and exterior trims; door panels; gas tank; glazing front side; rear windows; seat backing, exterior panels, wire insulation, profile extrusion for sealing, cladding, pillar co- vers, chassis parts, exhaust systems, fuel filter / filler, fuel pumps, fuel tank, body side mould- ings, convertible tops, exterior mirrors, exterior trim, fasteners / fixings, front end module, glass, hinges, lock systems, luggage / roof racks, pressed/stamped parts, seals, side impact protection, sound deadener / insulator and sunroof.

1-2) Devices for plane, railway, motor car (car, motorbike) including furnishings.

1-3) Devices for space applications, in particular rockets and satellites, e.g. reentry shields. I-4) Devices for architecture and design, mining applications, acoustic quietized systems, street refuges, and shelters.

I I - 1) Electric appliances, in particular washing machines, tumblers, ovens (microwave oven), dish-washers, mixers, and irons.

II-2) Foils for condensers, refrigerators, heating devices, air conditioners, encapsulating of electronics, semi-conductors, coffee machines, and vacuum cleaners.

I I I - 1) Technical articles such as cogwheel (gear), slide fittings, spacers, screws, bolts, han- dles, and knobs.

III-2) Rotor blades, ventilators and windmill vanes, solar devices, swimming pools, swimming pool covers, pool liners, pond liners, closets, wardrobes, dividing walls, slat walls, folding walls, roofs, shutters (e.g. roller shutters), fittings, connections between pipes, sleeves, and conveyor belts.

111-3) Profiles of any geometry (window panes) and siding.

111-4) Glass substitutes, in particular extruded plates, glazing for buildings (monolithic, twin or multiwall), aircraft, schools, extruded sheets, window film for architectural glazing, train, transportation, sanitary articles, and greenhouse.

111-5) Plates (walls, cutting board), extrusion-coating (photographic paper, tetrapack and pipe coating), silos, wood substitute, plastic lumber, wood composites, walls, surfaces, furniture, decorative foil, floor coverings (interior and exterior applications), flooring, duck boards, and tiles.

III-6) Cement-, concrete-, composite-applications and covers, siding and cladding, hand rails, banisters, kitchen work tops, roofing, roofing sheets, tiles, and tarpaulins.

I V- 1) Plates (walls and cutting board), trays, artificial grass, astroturf, artificial covering for stadium rings (athletics), artificial floor for stadium rings (athletics), and tapes.

V-l) Plastic films in general (packaging, dump, laminating, swimming pools covers, waste bags, wallpaper, stretch and shrink wrap, raffia, desalination film, batteries, and connectors).

V- 2) Agricultural films (greenhouse covers, tunnel, mulch, silage, bale wrap), especially in presence of intensive application of agrochemicals).

VI-1) Food packing and wrapping (flexible and solid), BOPP, BOPET, bottles.

VI-2) Cartridges, syringes, medical applications, containers for any transportation, waste bas- kets and waste bins, waste bags, bins, dust bins, bin liners, wheely bins, container in general, tanks for water / used water / chemistry / gas / oil / gasoline / diesel; tank liners, boxes, crates, battery cases, troughs, medical devices such as piston, ophthalmic applications, di- agnostic devices, and packing for pharmaceuticals blister.

VI I - 1) Devices of filled polymers (talc, chalk, china clay (kaolin), wollastonite, pigments, car- bon black, TiO ₂ , mica, nanocomposites, dolomite, silica, silicates, glass, asbestos).

Thus, another embodiment of the present invention is an article made of a composition as defined above. In another aspect, the presently claimed invention is directed to the use of the at least one compound of formula (A) and/or the compound of formula (B) as defined above for prevent ^¬ ing degradation of antioxidant compound as defined above.

In another aspect, the presently claimed invention is directed to the use of the stabilizer mixture as defined above for stabilizing an organic material exposed to light.

The presently claimed invention offers one or more of following advantages:

1. The stabilizer mixture of the presently claimed invention stabilize the non-light stable additives in articles when exposed to light.

2. Due to the use of stabilizer mixture of the present invention, the non-light stable addi ^¬ tives can be used in light exposed articles, which prolongs the durability of the end arti ^¬ cle.

In the following, specific embodiments of the presently claimed invention are described:

1. A stabilizer mixture comprising at least one compound selected from compound of formula (A) and compound of formula (B), wherein

E ₁ is C _1- C ₁₈ alkyl; and

E ₂ , E ₃ , E ₄ and E ₅ independently of one another are hydrogen, C _1- C ₁₈ alkyl, phenyl or phenyl substituted by 1, 2 or 3 C ₁ -C ₄ a I ky I ; and

Wherein

L is ROCOR’, wherein R and R’ inde- pendently of one another are C ₁ to C ₁₈ al- kylidene

E6, E7, E8, E9, E10, Ell, E12, E13 independently of one another are hydro- gen, C _1- C ₁₈ alkyl, phenyl or phenyl substi- tuted by 1, 2 or 3 C ₁ -C ₄ alkyl; and ii. at least one antioxidant compound, wherein the weight ratio of at least one compound of formula (A) and/or the com- pound of formula (B) to at least one antioxidant is in the range of 1:2 to 1:20. The stabilizer mixture according to embodiment 1, wherein E ₄ is C ₁ -C ₈ alkyl and E ₂ , E ₃ , E ₄ and E ₅ independently of one another are hydrogen, C ₁ -C ₄ a I kyl or phenyl. The stabilizer mixture according to embodiments 1 or 2, wherein L is ROCOR’, wherein R and R’ independently of one another are C ₁ to C ₁₈ alkylidene, and E ₆ , E ₇ , E ₈ , E ₉ , E ₁₀ , E ₁₁ , E ₁₂ , and E ₁₃ independently of one another are hydrogen, C ₁ -C ₄ alkyl or phenyl. The stabilizer mixture according to one or more of embodiments 1 to 3, wherein the at least one compound of formula (A) is selected from the formulae (A- 1), (A-2) and (A-3).

The stabilizer mixture according to one or more of embodiments 1 or 3, wherein the com- pound of formula (B) is a compound of formula (B- 1) (B- 1). The stabilizer mixture according to embodiment 1, wherein the antioxidant is selected from the group consisting of 2,4-bis(octylmercapto)-6-(3,5-di-tert-butyl-4-hydroxyani- lino)-1,3,5-triazine, 2-octyl mercapto-4,6-bis(3,5-di-tert-butyl-4-hydroxyanilino)-1,3,5-t ri- azine, 2-octylmercapto-4,6-bi(3,5-di-tert-butyl-4-hydroxyphenoxy)-1 ,3,5-triazine, 2,4,6- tris (3,5 -di-tert- butyl -4- hydroxyp he noxy)- 1,2,3 -triazine, 1, 3,5 -tris (3,5 -di-tert- butyl -4- hy- droxy benzyl) isocyan urate, 1, 3,5 -tris(4-tert- butyl -3 -hydroxy-2, 6-dim ethyl benzyl) isocy- anurate, 2, 4,6-tris(3,5-di-tert- butyl -4- hydroxy phenyl ethyl) -1,3,5 -triazine, 1,3,5 -tris (3,5- d i -te rt- bu ty I -4- hyd roxy p he ny I pro pionyl)-hexa hydro- 1,3,5 -triazine, 1,3,5 -tris (3,5 -dicyclo- hexy I -4- hydroxy benzyl) isocyan urate, pentaerythritol tetrakis [3 -[3, 5 -di-tert- butyl -4- hy- droxy phenyl] propionate, 1, 3,5 -tris (3,5-di-tert- butyl -4- hyd roxy benzyl) -2, 4,6-tri methyl ben- zene, 1, 4- bis (3,5 -d i -tert- butyl -4- hyd roxy benzyl) -2, 3,5,6-tetra methyl benzene, 2,4,6- tris (3,5 -di-tert- butyl -4- hyd roxy benzyl) phenol, octadecyl 3-(3,5-di-tert-butyl-4- hyd roxy- p he nyl) propionate, octy I -3,5-d i -tert- butyl -4- hyd roxy- hyd rocinna mate, Hexa methylene bis [3 -(3,5-di-tert- butyl -4- hyd roxy phenyl) propionate], 3 -(3,5-d itert- butyl -4- hydroxy- phenyl) -N-[6-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoylamino] hexyl] propen amide, calcium bis[monoethyl(3,5-di-tert-butyl-4-hydroxylbenzyl)phosphonate ], triethylene gly- col bis (3 -tert- butyl -4- hydroxy-5 -methyl phenyl) propionate, 3, 5 -di-tert- butyl -4- hyd roxy- hydrocinnamic acid 1,3,5-tris(2-hydroxyethyl)-s-triazinetrione ester, 3-tert-butyl-2-hy- droxy-5-methylphenyl sulfide, 2-Methyl-4,6-bis(n-octylsulfanylmethyl)phenol, 2,2'-thi- odiethylene bis [3 -(3,5-di-tert- butyl -4- hyd roxy phenyl) propionate], 2, 4-di -tert- butyl phenyl 3, 5 -di-tert- butyl -4- hyd roxy benzoate, 4- ((4,6- bis(octy Ithio) -1 ,3,5-triazi n-2-yl)amino)-2,6- di -tert- butyl phenol, bis (1,2, 2,6,6- pen ta methyl -4- pi peridyl) [ [3,5- bis (1,1 -dimethyl ethyl) - 4-hydroxyphenyl]methyl]butylmalonate, α -tocopherol, 3-(3,5-ditert-butyl-4-hydroxy- p h eny I) - N'- [3 -(3,5-d itert- butyl -4- hyd roxy phenyl)propanoyl] propane hyd razide, tris (4- tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate, ethylene bis[3,3-bis[3-(l,l-di- methylethyl)-4-hydroxyphenyl]butanoate], benzyl-2-acetamido-2-deoxy- α -D-galactopy- ranoside, 2,2'-Methylenebis(6-tert-butyl-4-methylphenol) monoacrylate, 2-propenoic acid ,2- (1 ,1 -d i methy lethy I) -6- [l-[3-(l,l-d i methy lethy I) -5- (1 ,1 -d imethy I propyl) -2- hyd rox- y phenyl] ethyl] -4- (1,1 -dimethyl propyl) phenyl ester, tris [2 -tert- butyl -4- (5 -tert- butyl -4- hy- d roxy-2- methy I phenyl) sulfa nyl -5 -methyl phenyl] phosphite, (1,2-dioxoethylene) bis (i mi- noethylene) bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), phenol, 2,6- bis [[3- (1,1 -dimethyl ethyl) -2-hydroxy-5-methylphenyl]octahydro-4,7-methano -lH-indenyl]-4- methyl-, 4,4' -thiobis(2-tert-butyl-5-methylphenol), 4,6- bis (octylthiomethyl) -o-cresol, - --- bis(octadecyl)hydroxylamine, benzenamine, N-phenyl-, reaction products with 2,4,4- trimethylpentene, 3,3'-thiodipropionic acid di-n-octadecyl ester, didodecyl 3,3' -thiodi- propionate, 4,4’-bis( α , α -dimethylbenzyl)diphenylamine, 3,3'-thiodipropionic acid dimyri- styl ester, dioctadecyl disulfide, and 2,2-Bis[[3-(dodecylthio)-l-oxopropoxy]methyl]pro- pane-1,3-diyl bis [3 - (dodecy I thio) propionate].

7. The stabilizer mixture according to one or more of embodiments 1 and 6, wherein the antioxidant is selected from the group consisting of 2,4-bis(octylmercapto)-6-(3,5-di-tert- buty I -4- hyd roxya ni I ino)-1,3,5-triazine, 2-octylmercapto-4,6-bis(3,5-di-tert-butyl-4-hy- d roxya ni I ino)-1,3,5-triazine, 2 -octyl me rcapto-4,6-bi (3,5 -di-tert- buty I -4- hyd roxy phe- noxy)-1,3,5-triazine, 2,4,6-tris(3,5-d i-tert- buty I -4- hyd roxy phenoxy) -1,2,3-triazine, 1,3,5- tris (3,5 -di-tert- butyl -4- hydroxy benzyl) isocyan urate, 1,3,5-tris(4-tert-butyl-3- hyd roxy-

2.6-di methyl benzyl) isocyan urate, 2,4,6-tris(3,5-di-tert-butyl-4-hyd roxy p h eny I ethyl) -

1,3,5-triazine, 1, 3,5 -tris (3,5 -di-tert- buty I -4- hyd roxy phenyl propionyl)- hexa hydro- 1,3,5 -tri - azine, 1, 3,5 -tris (3,5 -dicyc I o hexyl -4- hyd roxy benzyl) isocyan urate, pentaerythritol tetrakis [3 -[3,5 -di-tert- buty I -4- hyd roxy phenyl] propionate, 1, 3,5 -tris (3,5 -di-tert- buty 1-4- hydroxy benzyl) -2, 4,6-tri methyl benzene, l,4-bis(3,5-di-te rt- buty I -4- hyd roxy be nzy I) -

2.3.5.6-tetra methyl benzene, 2, 4,6-tris (3,5 -di-tert- buty I -4- hyd roxy benzyl) phenol, octade- cyl 3 -(3,5 -di-tert- buty I -4- hyd roxy phenyl) propionate, octyl-3,5-di-tert-butyl -4- hyd roxy- hydrocinnamate, Hexa methylene bis [3 -(3,5 -di-tert- buty I -4- hyd roxy phenyl) propionate], 3-(3,5-ditert-butyl-4-hydroxyphenyl)-N-[6-[3-(3,5-ditert-but yl-4-hydroxyphenyl)propa- noylamino]hexyl]propenamide, calcium bis [mo noethyl (3,5 -di-tert- buty I -4- hyd roxy I ben - zyl)phosphonate], triethylene glycol bis(3-tert-butyl-4-hydroxy-5-methylphenyl)propio- nate, 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid 1,3,5-tris(2-hyd roxyethy I) -s-tria- zinetrione ester, 3-tert-butyl-2-hydroxy-5-methylphenyl sulfide, 2-Methyl-4,6-bis(n-oc- ty I su If any I methyl) phenol, 2,2'-thiodiethylene bis [3 -(3,5 -di-tert- buty I -4- hyd roxy- phenyl)propionate], 2,4-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate, 4-((4,6- bis(octylth io) -1 ,3,5-triazi n -2-y l)a mi no) -2,6-d i-tert- buty I phenol, bis (1,2, 2,6,6- pen tame- thyl-4-piperidyl) [[3,5-bis(l,l-dimethylethyl)-4-hydroxyphenyl]methyl]butylmal onate, α - tocopherol, 3 -(3,5 -ditert- buty I -4- hyd roxy phenyl) -N'- [3- (3,5 -ditert- buty I -4- hydroxy- phenyl) pro pan oyl] pro pane hyd razide, tris (4-te rt- bu ty I -3- hyd roxy-2,6-di methyl benzyl) iso- cyanurate, ethylene bis[3,3-bis[3-(l,l-dimethylethyl)-4-hydroxyphenyl]butanoate] , ben- zyl-2-acetamido-2-deoxy- α -D-galactopyranoside, 2,2'-Methylenebis(6-tert-butyl-4- methylphenol) monoacrylate, 2-propenoic acid, 2- (1, 1 -d i methy lethy I) -6-[l-[3-(l, 1-di- methyl ethyl) -5 -(1,1 -dim ethyl propyl) -2 -hyd roxy phenyl] ethyl] -4- (1,1 -dimethyl propyl) p he- nyl ester, tris [2 -tert- buty 1-4- (5 -tert- buty I -4- hydroxy-2 -methy I phenyl) su If any 1-5- methylphenyl] phosphite, (l,2-dioxoe0thylene)bis(iminoethylene) bis(3-(3,5-di-tert- butyl-4-hydroxyphenyl)propionate), phenol, 2,6- bis [[3- (1 ,1 -d i methylethyl) -2-hy- droxy-5-methylphenyl]octahydro-4,7-methano -lH-indenyl]-4-methyl-, 4,4' -thiobis(2- tert-butyl-5-methylphenol), and 4,6-bis (octylthiomethyl) -o-cresol.

8. The stabilizer mixture according to one or more of embodiments 1, 6, and 7, wherein the antioxidant is selected from the group consisting of 1 ,3,5-tris(3,5-d i-tert- butyl -4-hy- droxy benzyl) isocyan urate, pentaerythritol tetrakis[3-[3,5-di-tert-butyl -4- hyd roxy- p he nyl] propionate, and 1, 3,5 -tris(3,5-d i-tert- butyl -4- hydroxy benzyl) -2, 4,6-tri methyl ben- zene.

9. The stabilizer mixture according to one or more of embodiments 1 to 8, further comprises at least one thiosynergist, wherein the at least one thiosynergist is selected from the group consisting of dilauryl thiodipropionate, dimistryl thiodipropionate, pentaerythritol tetrakis[3-(dodecylthio) propionate], distearyl thiodipropionate and distearyl disulphide.

10. The stabilizer mixture according to one or more of embodiments 1 to 9, wherein the thi- osynergist is distearyl thiodipropionate.

11. A composition comprising: c. an organic material, and d. a stabilizer mixture according to one or more of embodiments 1 to 10.

12. The composition according to embodiment 11, further comprises at least one sterically hindered amine light stabilizer.

13. The composition according to one or more of embodiments 11 and 12, wherein the at least one sterically hindered amine light stabilizer is selected from the group consisting of car- bonic acid bis(l-undecyloxy-2,2,6,6-tetramethyl-4-piperidyl)ester, bis(2,2,6,6-tetrame- thyl-4-piperidyl)sebacate, bis (2,2,6,6-tetra methyl -4- pi peridyl) succinate, bis (1,2,2, 6,6- pen tam ethyl -4- pipe ridyl)sebacate, bis (1 -octyl oxy-2,2,6,6-tetra methyl -4- pipe ridyl)seba- cate, bis (1,2, 2,6,6- pen ta methyl -4- pi peridyl) n -butyl -3,5 -d i-tert- butyl -4- hydroxy ben - zylmalonate, the condensate of l-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperi- dine and succinic acid, linear or cyclic condensates of N,N'-bis(2,2,6,6-tetramethyl-4-pi- peridyl)hexamethylenediamine and 4-tert-octyla mi no-2,6-dich loro-1, 3,5-triazine, tris (2,2,6,6-tetra methyl -4- pi peridyl) nitri I otriacetate, tetrakis (2,2,6,6-tetra methyl -4- pi - peridyl)-l,2,3,4-butanetetracarboxylate, 1 ,1'- (1,2-etha ned iyl) - bis (3,3,5,5-tetra methyl pi- perazinone), 4- benzoyl -2,2,6,6-tetra methyl piperidine, 4-steary I oxy-2,2,6,6-tetra methyl pi- peridine, bis (1,2, 2,6,6- pen tamethy I pi peridyl) -2- n -butyl -2- (2- hyd roxy-3,5-d i-tert- bu- tyl benzyl) malonate, 3-n -octyl -7, 7,9,9-tetramethy I -1,3,8-triazaspiro [4.5] decane-2, 4- dione, bis (l-octyloxy-2, 2,6,6-tetra methy I pi peridyl)sebacate, bis (1 -octyl oxy-2,2,6,6-tetra - methylpiperidyl)succinate, linear or cyclic condensates of N,N'-bis(2,2,6,6-tetramethyl-4- piperidyl)hexamethylenediamine and 4-morpholino-2,6-dichloro-1,3,5-triazine, the con- densate of 2-ch loro-4,6- bis (4- n- butyl a mi no-2, 2,6,6-tetra methyl pi peridy I) -1 ,3.5-triazi ne and l,2-bis(3-aminopropylamino)ethane, the condensate of 2-chloro-4,6-di-(4-n-butyla- mi no-1,2,2,6,6- penta methyl pi peridy I)- 1,3,5 -triazine and 1, 2 -bis (3 -a minopropy la- mi no) ethane, 8-acetyl-3-dodecyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5 ]decane-2,4- dione, 3 -d od ecy I -l-(2,2,6,6-tetramethyl-4-piperidyl) pyrrol idine-2,5-dione, 3-dodecyl-l- (1,2,2,6,6- penta methyl -4- pi peridy I) pyrrol idi ne-2,5-d ione, a mixture of 4-hexadecyloxy- and 4-stearyloxy-2,2,6,6-tetramethylpiperidine, a condensate of N,N'-bis(2,2,6,6-tetrame- thyl-4-piperidyl)hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-1,3,5-tria- zine, a condensate of l,2-bis(3-aminopropylamino)ethane and 2,4,6-trichloro-1,3,5-tria- zine and 4-butylamino-2,2,6,6-tetramethylpiperidine; a condensate of 1,6-hexanediamine and 2,4,6-trichloro-1,3,5-triazine as well as N,N-dibutylamine and 4-butylamino-2, 2,6,6- tetra methyl piperidine; N- (2, 2,6,6-tetra methyl -4- pi peridy l)-n-dodecylsuccinimide, N- (1,2, 2,6,6- penta methyl -4- pi peridy l)-n-dodecylsuccinimide, 2-undecyl-7,7,9,9-tetrame- thyl-l-oxa-3,8-diaza-4-oxo-spiro[4,5]decane, a reaction product of 7,7,9,9-tetramethyl-2- cycloundecyl-l-oxa-3,8-diaza-4-oxospiro-[4,5]decane and epichlorohydrin, 1,1- bis(l,2,2,6,6-pentamethyl-4-piperidyloxycarbonyl)-2-(4-metho xyphenyl)ethene, N,N'- bis-formyl-N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexameth ylenediamine, a diester of 4-methoxymethylenemalonic acid with l,2,2,6,6-pentamethyl-4-hydroxypiperidine, poly[methylpropyl-3-oxy-4-(2,2,6,6-tetramethyl-4-piperidyl)] siloxane, a reaction product of maleic acid anhydride- α -olefin copolymer with 2, 2,6,6-tetra methyl -4-ami nopiperidine or 1,2, 2, 6, 6- penta methyl -4-ami no piperidine, 2,4-bis[N-(l-cyclohexyloxy-2,2,6,6-tetra- methylpiperidine-4-yl)-N-butylamino]-6-(2-hydroxyethyl)amino -1,3,5-triazine, 1 - (2- hy- d roxy-2 - methy I p ro poxy) -4-octadecanoy I oxy-2, 2,6,6-tetra methyl piperidine, 5-(2- ethylhexanoyl)oxymethyl-3,3,5-trimethyl-2-morpholinone, 5-(2-ethylhexanoyl)oxymethyl- 3,3,5-trimethyl-2-morpholinone, the reaction product of 2,4-bis[(l-cyclohexyloxy-2,2,6,6- piperidine-4-yl)butylamino]-6-chloro-s-triazine with N, N’-bis(3-a minopropy l)ethylenedi- amine), 1,3,5-tris(N -cyclohexyl- N- (2, 2,6,6-tetra methy I pi perazine-3-one-4-yl)a mi no) -s- triazine, 1,3,5 -tris(N-cyc I ohexyl-N-(l,2, 2,6,6- pen ta methy I piperazine-3 -one-4-yl) amino) - s-triazine, 4-N-butyl-2-N,4-N-bis(2,2,6,6-tetramethylpiperidin-4-yl)-2-N -[6-[(2,2,6,6-tet- ra methy I pi peridin-4-yl)a mi no] hexy I] -1 ,3,5-triazi ne-2, 4-diamine, N,N'-bis(2,2,6,6-tetra- methyl-4-piperidyl)-N,N'-diformylhexamethylenediamine, and mixtures thereof. The composition according to one or more of embodiments 11 to 13, further comprises at least one compound (C) selected from general formula (I), general formula (II), general formula (III), general formula (IV), and mixtures thereof - compound (C) of general formula (I) wherein

A ₁ is selected from linear or branched, substituted or unsubstituted

C ₂ -C ₁₈ alkylene, substituted or unsubstituted C ₅ -C ₇ cycloalkylene and C ₁ -C ₄ alkylenedi(C ₅ -C ₇ cyclo alkylene),

A ₂ is independently selected from H, linear or branched, substituted or unsubstituted C ₁ -C ₁₂ alkyl, C ₁ -C ₁₂ alkyloxy, substituted or un- substituted C ₅ -C ₁₂ cycloalkyl and C ₅ -C ₁₂ cycloalkyloxy,

A ₃ and A ₄ are independently selected from H, linear or branched, substi- tuted or unsubstituted C ₁ -C ₁₂ alkyl, substituted or unsubstituted C ₅ -C ₁₂ cycloalkyl and a group of the formula (a-1), or

A ₃ and A ₄ , together with the nitrogen atom to which they are bonded, form a 5- to 10-membered heterocyclic ring; and a is an integer in the range of 1 to 20 and the repeating units are the same or different; - compound (C) of general formula (II)

wherein x ₁ and x ₂ is independently selected from C ₁ to C ₃₀ alkoxy, compound (C) of general formula (III) wherein Y ₁ is linear or branched, substituted or unsubstituted C ₃ to C ₂₀ alkyl, Y2 is C ₁ to C ₃₀ alkyl; and compound (C) of general formula (IV)

wherein

Y ₁ is linear or branched, substituted or unsubstituted C ₃ to C ₂₀ alkyl,

Y ₃ is independently selected from linear or branched, substituted or un- substituted C ₃ to C ₂₀ alkyl, and C ₃ to C ₂₀ alkylidene,

X is C ₂ to C ₅ alkyl, n is an integer in the range of 1 to 8 The composition according to one or more of embodiments 11 to 14, wherein the com- pound (C) is selected from the formulae (C-l), (C- II), (C- III), (C-IV), (C-V), (C-VI), (C-

VII), and (C-VIII). wherein a is an integer in the range of 1 to 10; and

5

wherein n is 2. The composition according to one or more of embodiments 11 to 15, further comprises at least one additive selected from the UV stabilizers, slip agents, anti-block agents, thermal fillers, pigments, anti-fog and anti-mist agents. The composition according to one or more of embodiments 11 to 16, further comprises acid scavengers. The composition according to embodiment 16, wherein the UV stabilizer is selected from 2-(2'-hydroxyphenyl) benzotriazoles, 2-hydroxybenzophenones, 2-(2-hydroxyphenyl)- 1,3,5-triazines, cyanoacrylates, oxanilide, benzoxazine and mixtures thereof. The composition according to embodiment 11, wherein the organic material is selected from polymers of monoolefins and diolefins, copolymers of monoolefins and diolefins with each other or with other vinyl monomers, hydrocarbon resins and mixtures of poly- alkylenes and starch, polystyrene, poly(p-methylstyrene), poly ( α -methylstyrene), graft copolymers of vinyl aromatic monomers such as styrene or α -methylstyrene, halogen- containing polymers, polymers derived from α,β -unsaturated acids and derivatives thereof, polymers derived from unsaturated alcohols and amines or the acyl derivatives or acetals thereof, homopolymers and copolymers of cyclic ethers, Polyphenylene oxides and sulfides, polyurethanes derived from hydroxyl-terminated polyethers, polyesters or poly- butadienes on the one hand and aliphatic or aromatic polyisocyanates on the other, poly- amides and copolyamides derived from diamines and dicarboxylic acids and/or from ami- nocarboxylic acids or the corresponding lactams, polyureas, polyimides, polyamide-im- ides, polyetherimides, polyesterimides, polyhydantoins and polybenzimidazoles, polyes- ters derived from dicarboxylic acids and diols and/or from hydroxycarboxylic acids or the corresponding lactones or lactides, polycarbonates and polyester carbonates, polyketones, polysulfones, polyether sulfones and polyether ketones, crosslinked poly- mers derived from aldehydes on the one hand and phenols, ureas and melamines on the other hand, drying and non-drying alkyd resins, unsaturated polyester resins derived from copolyesters of saturated and unsaturated dicarboxylic acids with polyhydric alcohols and vinyl compounds as crosslinking agents, crosslinkable acrylic resins derived from substi- tuted acrylates, alkyd resins, polyester resins and acrylate resins crosslinked with mela- mine resins, urea resins, isocyanates, isocyanurates, polyisocyanates or epoxy resins, crosslinked epoxy resins derived from aliphatic, cycloaliphatic, heterocyclic or aromatic glycidyl compounds, natural polymers such as cellulose, rubber, gelatin and chemically modified homologous derivatives thereof, aqueous emulsions of natural or synthetic rub- ber, linear low-density polyethylene, low-density polyethylene, high density polyethylene, ethylene-vinyl acetate copolymer, ethylene-butyl acrylate copolymer, polypropylene ho- mopolymer and polypropylene copolymer.

20. The composition according to one or more of embodiments 11 to 19, wherein the weight ratio of the organic material to the stabilizer mixture is 0.005:10.

21. An article comprising the composition according to one or more of embodiments 11 to 20.

22. Use of the at least one compound of formula (A) and/or the compound of formula (B) according to embodiment 1 for preventing degradation of antioxidant compound accord- ing to embodiment 1.

23. Use of the stabilizer mixture according to one or more of embodiments 1 to 10 for stabi- lizing an organic material exposed to light. The following examples illustrate the invention in greater detail. All percentages and parts are by weight, unless stated otherwise.

EXAMPLES Stabilizers listed in Tables 1, 2, 3, 4, and 5 below:

Compound (A-l)

Compound (A-2)

Compound (A-3) Compound D: A condensate of 1,6-hexanediamine and 2,4,6-trich loro- 1,3,5-triazi ne as well as N,N-dibutylamine and 4-butylamino-2,2,6,6-tetramethylpiperidine

Antioxidant-1: Pentaerythritol tet ra kis [3 - [3,5 -di-tert- butyl -4- hydroxy phenyl] propionate

Antioxidant-2: 1, 3,5 -tris(3,5-di-tert- butyl -4- hydroxy benzyl) isocyan urate

Antioxidant-3: 1, 3,5 -tris (3,5-d i-tert- butyl -4- hydroxy benzyl) -2, 4,6-tri methyl benzene

Antioxidant-4: Distearyl thiodipropionate Compound E: Tris (2,4-d i -tert- buty I ph e ny I) phosphite Compound F: Magnesium aluminum hydroxycarbonate

(A) Preparation of the film samples lOg of Plexiglas 7N are dissolved in 40g Methylene Chloride together with 0.203 g of com- pound of tables 1 to 5 (composed of 0.103 g of Antioxidant or O.lOOg Antioxidant plus 0.003 g

Hydroxyphenyl-triazine). All compounds also contain 0.1g of HALS (a condensate of 1, 6-hex - anediamine and 2,4,6-trichloro-1,3,5~triazine as well as N,N-dibutylamine and 4-butylamino- 2,2, 6,6-tetra methyl piperidine) as Base stabilization for the integrity of the prepared film.

Films are drawn with the help of an automatic Blade (Erichsen) with a blade speed of 12 mm/sec and a gap of height of 120 mm. The prepared film is exposed to DIN ISO 4892-2

Cyclus 1 (Xenon light with Boro S /Boro S filters, 60 W/ m2 @ 300 - 400 nm (equivalent to 0.51 W/(m2-nm) @ 340 nm), BPT 65 ± 2 ° C, 50+/-5% Pel. Humidity, Dry Bulk Temperature 38 +/- 3° C, 102 min. light, 18 min. water spray) using an Atlas 5000 devise or to DIN EN ISO 4892-2 Cyclus 5 (Xenon light with Boro S / Soda Lime filters, 50 W/m2 @ 300 - 400 nm (equivalent to 0.43 W/(m2-nm) @ 340 nm), BPT 65 ± 3 ° C, 50+/-10% Rel. Humidity, Dry Bulk Temperature 38 +/- 3° C, continuous light no water spray) using an Atlas Cl 65 devise or to ASTM G 155 Cyclus 1 The % Absorption of the main UV is measured (250-500 nm) on a regular base using a Lambda 20 UV - vis spectrum from Perkin Elmer. The optical absorbance spectra are observed at the maximum absorbance of the AO were the maximum Absorbance are measured around 270-290 nm. The results of the Decrease in percentage of Absorption (% Abs) of the antioxidants are shown in Table 1 for the sample exposed to DIN ISO 4892-2

Cyclus 5 (Dry) and in Table 2 for the samples exposed to DIN EN ISO 4892-2 Cyclus 1 (Wet) and in the Table 3 for samples exposed to ASTM G 155 Cyclus 1 (dry) Xenon light with Boro S /Boro S filters, at 0.35W/(m2-nm) @ 340 nm, BPT 63° C, 50+/- 10 % Rel. Humidity, Dry Bulk Temperature 42 +/- 4 ° C, using an Atlas devise.

The table shows the efficiency and inherent stability over time of the main antioxidant alone versus the same antioxidant plus hydroxypenyl triazine compound

Tables 1 to 3: Decrease of UV Absorption of the antioxidants in % in the film exposed to ISO 4892-2 cyclus 1 (Wet)

PMMA solution film with 1% Compound D UV spectrum Antioxidant-1 measured at 275 nm

Table 2:

PMMA solution film with 1% Compound D UV spectrum Antioxidant-2 measured at 280nm

Table 3:

PMMA solution film with 1% Compound D UV spectrum Antioxidant-3 measured at 275nm

From tables 1 to 3, it is evident that the use of the hydroxyphenyl triazine compound along with antioxidant increases stability of the antioxidant in the film when exposed to light as compared to antioxidant alone. Table 4: Decrease of UV Absorption of the antioxidants in % in the film exposed to ASTM G 155 Cyclus 1 (dry)

PMMA solution film with 1% Compound D UV spectrum Antioxidant-1 measured at 275 nm

Table 5: Decrease of UV Absorption of the antioxidants in % in the film exposed to ASTM G 155 Cyclus 1 (dry)

PMMA solution film with 1% Compound D UV spectrum Antioxidant-4 measured at 270 nm From tables 4 and 5, it is evident that the use of the hydroxyphenyl triazine compound along with antioxidant increases stability of the antioxidant in the film when exposed to light as compared to antioxidant alone. (B) Preparation of the test specimens:

A mixture of a non-stabilised high-density polyethylene (HDPE; Hostalen'CRP-100; natural classified under PE 100 of LyondellBasell; Melt Flow Rate: 190° C/5.0 Kg: 0.23g/10 min (ISO 1133); Density: 0.95g/cm3 (ISO 1183)) and the additives listed in Table 6 were mixed with a Mixaco Lab CM12 high speed mixer device. The obtained full formulation was then compounded on a Collin 25X42D extruder at 240° C and then injection molded on an Engel HL65 injection molding machine at 230° C.

The injection molded plaques 40 mm x 60 mm x 2 mm were exposed to QUV-SE from QLab using the ASTM G 154-Cl (UV-A fluorescent lamp with no filter, 0.77 W/(m2-nm) @ 340 nm and BPT A:60± 3 C &B: 50 + 3 C). The parameters measured are Time & Heat Flow at maximum oxidation peak using a DSC Q2000 von TA Instrument (Waters) at 200° C under O ₂ after the 1600 hours QUV-SE (ASTM G 154-Cl). The results are listed in Table 7.

The parameters measured were H P-OIT (@150° C and 500 psi) using a DSC Q2000 von TA Instrument (Waters) TA with a pressure cell after the 1600 hours QUV-SE (ASTM G 154-Cl). The results are listed in Table 8.

Table 6:

Table 7: Time & Heat Flow at maximum Oxidation Peak

The Table 7 shows that the inventive Formulations give longer Time & higher Heat Flow at maximum oxidation peak, showing superior stability of the specimens when exposed to QUV compared to formulations free of the Compound (A). Table 8: HP-OIT in minutes @ 150° C and 500 psi

The Table 8 shows that the inventive Formulations give longer HP-OIT (@150° C and 500 psi), showing superior stability of the specimens when exposed to QUV compared to formu- lations free of the Compound (A).