Polymeric hollow articles containing chroman-based compounds and made by rotational molding

Abstract

A stabilizer composition for producing a polymeric hollow article in a rotomolding process has stabilizing amounts of: (i) at least one chroman-based compound according to Formula (V): wherein at least one instance of R 21 is OR 27 , R 27 is COR′″ or Si(R 28 ) 3 , and R′″, R 22 , R 23 R 24 , R 25 and R 26 are as defined herein; (ii) at least one phosphite or phosphonite; and (iii) a basic co-additive selected from alkali metal or alkaline metal salts of higher fatty acids. A polymeric hollow article is made by a process comprising: a) filling a mold with a polyolefin and a stabilizing amount of the stabilizer composition described herewith; b) rotating the mold around at least one axis while heating the mold in an oven, thereby fusing the composition and spreading it to the walls of the mold; c) cooling the mold; and d) opening the mold to remove the resulting polymeric hollow article.

We claim: 
     
         1 . A polymeric hollow article made by a process comprising:
 a) filling a mold with a polyolefin and a stabilizing amount of a stabilizer composition, wherein the stabilizer composition comprises:
 (i) at least one chroman-based compound according to Formula (V): 
   
       
         
           
           
               
               
           
         
       
       wherein
 R 21  is present at from 1 to 4 positions of the aromatic portion of Formula (V) and in each instance is independently chosen from:
 C 1 -C 12  hydrocarbyl; 
 NR′R″, wherein each of R′ and R″ is independently chosen from H or C 1 -C 12  hydrocarbyl; or 
 OR 27 , wherein R 27  is chosen from C 1 -C 12  hydrocarbyl, COR′″ or Si(R 28 ) 3 , wherein R′″ is chosen from H or C 1 -C 20  hydrocarbyl and R 28  is chosen from C 1 -C 12  hydrocarbyl or alkoxy; and wherein at least one instance of R 21  is OR 27 ; 
 
 R 22  is chosen from H or C 1 -C 12  hydrocarbyl; 
 R 23  is chosen from H or C 1 -C 20  hydrocarbyl; 
 each of R 24 -R 25  is independently chosen from H, C 1 -C 12  hydrocarbyl or OR″″, 
 
       wherein R″″ is chosen from H or C 1 -C 12  hydrocarbyl; and
 R 26  is H or a bond which together with R 25  forms ═O;
 (ii) at least one phosphite or phosphonite; and 
 (iii) a basic co-additive selected from alkali metal or alkaline metal salts of higher fatty acids; 
 
 b) rotating the mold around at least one axis while heating the mold in an oven, thereby fusing the composition and spreading it to the walls of the mold; 
 c) cooling the mold; and 
 d) opening the mold to remove the resulting product, 
 
       thereby producing the polymeric hollow article. 
     
     
         2 . A polymeric hollow article according to  claim 1 , wherein the at least one phosphite or phosphonite is chosen from:
 (i) a compound according to Formulas (1)-(7):   
       
         
           
           
               
               
           
         
       
       in which the indices are integral and
 n is 2, 3 or 4; p is 1 or 2; q is 2 or 3; y is 1, 2 or 3; and z is 1 to 6; 
 A 1 , if n or q is 2, is C 2 -C 18  alkylene; C 2 -C 12  alkylene interrupted by oxygen, sulfur or —NR 4 —; a radical of the formula 
 
       
         
           
           
               
               
           
         
       
       or phenylene;
 A 1 , if n or q is 3, is a trivalent radical of the formula C r H 2r−1 ; wherein r is an integer from 4 to 12; 
 A 1 , if n is 4, is 
 
       
         
           
           
               
               
           
         
         B is a direct bond, —CH 2 —, —CHR 4 —, —CR 1 R 4 —, sulfur, C 5 -C 7  cycloalkylidene, or cyclohexylidene which is substituted by from 1 to 4 C 1 -C 4  alkyl radicals in position 3, 4 and/or 5; 
         D 1 , if p is 1, is C 1 -C 4  alkyl and, if p is 2, is —CH 2 OCH 2 —; 
         D 2 , if p is 1, is C 1 -C 4  alkyl; 
         E, if y is 1, is C 1 -C 18  alkyl, —OR 1  or halogen; 
         E, if y is 2, is —O-A 2 -O—, wherein A 2  is as defined for A 1  when n is 2; 
         E, if y is 3, is a radical of the formula R 4 C(CH 2 O—) 3  or N(CH 2 CH 2 O—) 3 ; 
         Q is the radical of an at least z-valent mono- or poly-alcohol or phenol, this radical being attached via the oxygen atom of the OH group of the mono- or poly-alcohol or phenol to the phosphorus atom; 
         R 1 , R 2  and R 3  independently of one another are C 1 -C 18  alkyl which is unsubstituted or substituted by halogen, —COOR 4 , —CN or —CONR 4 R 4 ; C 2 -C 18  alkyl interrupted by oxygen, sulfur or —NR 4 —; C 7 -C 9  phenylalkyl; C 5 -C 12  cycloalkyl, phenyl or naphthyl; naphthyl or phenyl substituted by halogen, 1 to 3 alkyl radicals or alkoxy radicals having a total of 1 to 18 carbon atoms or by C 7 -C 9  phenylalkyl; or a radical of the formula 
       
       
         
           
           
               
               
           
         
       
       in which m is an integer from the range 3 to 6;
 R 4  is hydrogen, C 1 -C 8  alkyl, C 5 -C 12  cycloalkyl or C 7 -C 9  phenylalkyl, 
 R 5  and R 6  independently of one another are hydrogen, C 1 -C 8  alkyl or C 5 -C 6  cycloalkyl, 
 R 7  and R 8 , if q is 2, independently of one another are C 1 -C 4  alkyl or together are a 2,3-dehydropentamethylene radical; 
 R 7  and R 8 , if q is 3, are methyl; 
 each instance of R 14  is independently hydrogen, C 1 -C 9  alkyl or cyclohexyl; 
 each instance of R 15  is independently hydrogen or methyl; 
 X and Y are each a direct bond or oxygen; 
 Z is a direct bond, methylene, —C(R 16 ) 2 — or sulfur; and 
 R 16  is C 1 -C 8  alkyl; 
 (ii) a trisarylphosphite according to Formula 8: 
 
       
         
           
           
               
               
           
         
       
       wherein R 17  is a substituent that is present at from 0 to 5 positions of the aromatic portion of Formula (8) and in each instance is independently chosen from C 1 -C 20  alkyl, C 3 -C 20  cycloalkyl, C 4 -C 20  alkyl cycloalkyl, C 6 -C 10  aryl or C 7 -C 20  alkylaryl; or
 (iii) mixtures of (i) and (ii). 
 
     
     
         3 . A polymeric hollow article according to  claim 2 , wherein the phosphite or phosphonite is chosen from triphenyl phosphite; diphenyl alkyl phosphites; phenyl dialkyl phosphites; trilauryl phosphite; trioctadecyl phosphite; distearyl pentaerythritol phosphite; tris(2,4-di-t-butylphenyl) phosphite; tris(nonylphenyl) phosphite; a compound of formulae (A), (B), (C), (D), (E), (F), (G), (H), (J), (K) or (L): 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
       2-butyl-2-ethyl-1,3-propanediol 2,4,6-tri-t-butylphenol phosphite; bis-(2,6-di-t-butyl-4-methlphenyl) pentaerythritol diphosphite; 2-butyl-2-ethyl-1,3-propanediol 2,4-di-cumylphenol phosphite; 2-butyl-2-ethyl-1,3-propanediol 4-methyl-2,6-di-t-butylphenol phosphite or bis-(2,4,6-tri-t-butyl-phenyl) pentaerythritol diphosphite. 
     
     
         4 . A polymeric hollow article according to  claim 2 , wherein the at least one phosphite or phosphonite is chosen from tris(2,4-di-t-butylphenyl)phosphite (IRGAFOS® 168); bis(2,4-dicumylphenyl)pentaerythritol diphosphite (DOVERPHOS® S9228) or tetrakis(2,4-di-t-butylphenyl)4,4′-biphenylene-diphosphonite (IRGAFOS® P-EPQ). 
     
     
         5 . A polymeric hollow article according to  claim 1 , wherein the stabilizer composition further comprises at least one hindered phenol. 
     
     
         6 . A polymeric hollow article according to  claim 5 , wherein the at least one hindered phenol comprises a molecular fragment according to one or more of Formula (IVa), (IVb), or (IVc): 
       
         
           
           
               
               
           
         
       
       wherein
 R 18  of Formula (IVa), (IVb), or (IVc) is independently chosen from hydrogen or a C 1-4  hydrocarbyl; 
 each of R 19  and R 20  of Formula (IVa), (IVb), or (IVc) is independently chosen from hydrogen or a C 1 -C 20  hydrocarbyl; and 
 R 37  of Formula (IVa), (IVb), or (IVc) is independently chosen from a C 1 -C 12  hydrocarbyl. 
 
     
     
         7 . A polymeric hollow article according to  claim 6 , wherein R 18  and R 37  are chosen from methyl or t-butyl. 
     
     
         8 . A polymeric hollow article according to  claim 6 , wherein the at least one hindered phenol compound is chosen from (1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione; 1,1,3-tris(2′-methyl-4′-hydroxy-5′-t-butylphenyl)butane; triethylene glycol bis[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionate]; 4,4′-thiobis(2-t-butyl-5-methylphenol); 2,2′-thiodiethylene bis[3-(3-t-butyl-4-hydroxyl-5-methylphenyl)propionate]; octadecyl 3-(3′-t-butyl-4′-hydroxy-5′-methylphenyl)propionate; tetrakismethylene(3-t-butyl-4-hydroxy-5-methylhydrocinnamate)methane; N,N′-hexamethylene bis[3-(3-t-butyl-4-hydroxy-5-methylphenyl)propionamide]; di(4-t-butyl-3-hydroxy-2,6-dimethyl benzyl) thiodipropionate; octadecyl 3,5-di-t-butyl-4-hydroxyhydrocinnamate; or mixtures thereof. 
     
     
         9 . A polymeric hollow article according to  claim 1 , wherein R 21  is present in at least one instance as OR 27 . 
     
     
         10 . A polymeric hollow article according to  claim 9 , wherein R 21  is present in at least three instances and is chosen from OR 27  or methyl. 
     
     
         11 . A polymeric hollow article according to  claim 9 , wherein R 23  is a C 1 -C 18  hydrocarbyl. 
     
     
         12 . A polymeric hollow article according to  claim 1 , wherein the chroman-based compound is vitamin E acetate according to Formula (Va) 
       
         
           
           
               
               
           
         
       
       wherein R 21  is —OC(O)CH 3 . 
     
     
         13 . A polymeric hollow article according to  claim 1 , wherein the chroman-based compound comprises two or more compounds according to Formula (V). 
     
     
         14 . A polymeric hollow article according to  claim 1 , wherein the chroman-based compound is present from 0.001% to 5.0% by weight of the weight of the polyolefin. 
     
     
         15 . A polymeric hollow article according to  claim 14 , wherein the chroman-based compound is present from 0.01% to 1.0% by weight of the weight of the polyolefin. 
     
     
         16 . A polymeric hollow article according to  claim 1 , wherein the polyolefin is chosen from:
 (i) polymers of monoolefins chosen from polypropylene, polyisobutylene, polybut-1-ene, or poly-4-methylpent-1-ene;   (ii) polymers of diolefins chosen from polyisoprene or polybutadiene;   (iii) polymers of cycloolefins chosen from cyclopentene or norbornene;   (iv) polyethylene chosen from optionally crosslinked polyethylene, 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), very low density polyethylene (VLDPE), or ultralow density polyethylene (ULDPE);   (v) copolymers of the monoolefins, diolefins, or cycloolefins of any of (i) to (iv); or   vi) mixtures of any of (i) to (v).   
     
     
         17 . A polymeric hollow article according to  claim 16 , wherein the polyolefin is at least one of linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), or polypropylene. 
     
     
         18 . A polymeric hollow article according to  claim 1 , wherein the stabilizer composition further comprises a light stabilizer chosen from hindered amine light stabilizers, hindered hydroxyl benzoates, nickel phenolates, ultraviolet light stabilizers, or mixtures thereof, in an amount effective to stabilize the polymer composition against the degradative effects of visible and/or ultraviolet light radiation. 
     
     
         19 . A polymeric hollow article according to  claim 18 , wherein the light stabilizer is a hindered amine light stabilizer comprising a molecular fragment according to:
 (i) Formula (VI):   
       
         
           
           
               
               
           
         
         wherein 
         R 31  is chosen from hydrogen, OH, C 1 -C 20  hydrocarbyl, —CH 2 CN, C 1 -C 12  acyl or C 1 -C 18  alkoxy; 
         R 38  is chosen from hydrogen or C 1 -C 8  hydrocarbyl; and 
         each of R 29 , R 30 , R 31 , and R 32  is independently chosen from a C 1 -C 20  hydrocarbyl; or 
       
       R 60  and R 61  and/or R 63  and R 64  taken together with the carbon to which they are attached form a C 5 -C 10  cycloalkyl; or
 (ii) Formula (VIa) 
 
       
         
           
           
               
               
           
         
         wherein 
         m is an integer from 1 to 2; 
         R 39  is chosen from hydrogen, OH, C 1 -C 20  hydrocarbyl, —CH 2 CN, C 1 -C 12  acyl, or C 1 -C 18  alkoxy; and 
         each of G 1 -G 4  is independently a C 1 -C 20  hydrocarbyl. 
       
     
     
         20 . A polymeric hollow article according to  claim 19 , wherein the hindered amine light stabilizer is chosen from bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate; bis(2,2,6,6-tetramethylpiperidin-4-yl)succinate; bis(1,2,2,6,6-pentamethylpiperidin-4-yl)sebacate; bis(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl)sebacate; bis(1,2,2,6,6-pentamethylpiperidin-4-yl) n-butyl 3,5-di-tert-butyl-4-hydroxybenzylmalonate; a condensate of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid; 2,2,6,6-tetramethylpiperidin-4-yl stearate; 2,2,6,6-tetramethylpiperidin-4-yl dodecanate; 1,2,2,6,6-pentamethylpiperidin-4-yl stearate; 1,2,2,6,6-pentamethylpiperidin-4-yl dodecanate; a condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-tert-octylamino-2,6-dichloro-1,3,5-triazine; tris(2,2,6,6-tetramethylpiperidin-4-yl) nitrilotriacetate; tetrakis(2,2,6,6-tetramethylpiperidin-4-yl)-1,2,3,4-butanetetracarboxylate; 4-benzoyl-2,2,6,6-tetramethylpiperidine; 4-stearyloxy-2,2,6,6-tetramethylpiperidine; bis(1,2,2,6,6-pentamethylpiperidyl)-2-n-butyl-2-(2-hydroxy-3,5-di-tert-butylbenzyl)malonate; 3-n-octyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5]decan-2,4-dione; bis(1-octyloxy-2,2,6,6-tetramethylpiperidyl)sebacate; bis(1-octyloxy-2,2,6,6-tetramethylpiperidyl)succinate; a condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-morpholino-2,6-dichloro-1,3,5-triazine; a condensate of 2-chloro-4,6-bis(4-n-butylamino-2,2,6,6-tetramethylpiperidyl)-1,3,5-triazine and 1,2-bis(3-aminopropylamino)ethane; a condensate of 2-chloro-4,6-bis(4-n-butylamino-1,2,2,6,6-pentamethylpiperidyl)-1,3,5-triazine and 1,2-bis-(3-aminopropylamino)ethane; 8-acetyl-3-dodecyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5]decane-2,4-dione; 3-dodecyl-1-(2,2,6,6-tetramethylpiperidin-4-yl)pyrrolidin-2,5-dione; 3-dodecyl-1-(1-ethanoyl-2,2,6,6-tetramethylpiperidin-4-yl)pyrrolidin-2,5-dione; 3-dodecyl-1-(1,2,2,6,6-pentamethylpiperidin-4-yl)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-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-1,3,5-triazine; a condensate of 1,2-bis(3-aminopropylamino)ethane, 2,4,6-trichloro-1,3,5-triazine and 4-butylamino-2,2,6,6-tetramethylpiperidine; 2-undecyl-7,7,9,9-tetramethyl-1-oxa-3,8-diaza-4-oxospiro[4.5]decane; oxo-piperanzinyl-triazines; a reaction product of 7,7,9,9-tetramethyl-2-cycloundecyl-1-oxa-3,8-diaza-4-oxospiro[4.5]decane and epichlorohydrin; tetrakis(2,2,6,6-tetramethyl-4-piperidyl) butane-1,2,3,4-tetracarboxylate; 1,2,3,4-butanetetracarboxylic acid, tetrakis(1,2,2,6,6-pentamethyl-4-piperidinyl)ester; 1,2,3,4-butanetetracarboxylic acid, 1,2,2,6,6-pentamethyl-4-piperdinyl tridecyl ester; 1,2,3,4-butanetetracarboxylic acid, 2,2,6,6-tetramethyl-4-piperidinyl tridecyl ester; 1,2,3,4-butanetetracarboxylic acid, polymer with 2,2,6,6-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]-undecane-3,9-diethanol,1,2,2,6,6-pentamethyl-4-piperdinyl ester; 1,2,3,4-butanetetracarboxylic acid, polymer with 2,2,6,6-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]-undecane-3,9-diethanol, 2,2,6,6-tetramethyl-4-piperdinyl ester; bis(1-undecanoxy-2,2,6,6-tetramethylpiperidin-4-yl)carbonate; 1-(2-hydroxy-2-methylpropoxy)-2,2,6,6-tetramethyl-4-piperdinol; 1-(2-hydroxy-2-methylpropoxy)-4-octadecanoyloxy-2,2,6,6-tetramethylpiperidine; 1-(4-octadecanoyloxy-2,2,6,6-tetramethylpiperidin-1-yloxy)-2-octadecanoyloxy-2-methylpropane; 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperdinol; a reaction product of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperdinol and dimethylsuccinate; 2,2,4,4-tetramethyl-7-oxa-3,20-diazadispiro[5.1.11.2]heneicosan-21-one; the ester of 2,2,6,6-tetramethyl-4-piperidinol with higher fatty acids; 3-dodecyl-1-(2,2,6,6-tetramethyl-4-piperidyl)pyrrolidine-2,5-dione; 1H-Pyrrole-2,5-dione, 1-octadecyl-, polymer with (1-methylethenyl)benzene and 1-(2,2,6,6-tetramethyl-4-piperidinyl)-1H-pyrrole-2,5-dione; piperazinone, 1,1′,1″-[1,3,5-triazine-2,4,6-triyltris[(cyclohexylimino)-2,1-ethanediyl]]tris[3,3,5,5-tetramethyl-; piperazinone, 1,1′,1″-[1,3,5-triazine-2,4,6-triyltris[(cyclohexylimino)-2,1-ethanediyl]]tris[3,3,4,5,5-pentamethyl-; the reaction product of 7,7,9,9-tetramethyl-2-cycloundecyl-1-oxa-3,8-diaza-4-oxospiro[4.5]decane and epichlorohydrin; the condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-1,3,5-triazine; the condensate of 1,2-bis(3-aminopropylamino)ethane, 2,4,6-trichloro-1,3,5-triazine and 4-butylamino-2,2,6,6-tetramethylpiperidine; the condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-morpholino-2,6-dichloro-1,3,5-triazine; the condensate of 2-chloro-4,6-bis(4-n-butylamino-2,2,6,6-tetramethylpiperidyl)-1,3,5-triazine and 1,2-bis(3-aminopropylamino)ethane; the condensate of 2-chloro-4,6-bis(4-n-butylamino-1,2,2,6,6-pentamethylpiperidyl)-1,3,5-triazine and 1,2-bis-(3-aminopropylamino)ethane; 2-[(2-hydroxyethyl)amino]-4,6-bis[N-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)butylamino-1,3,5-triazine; propanedioic acid, [(4-methoxyphenyl)-methylene]-bis-(1,2,2,6,6-pentamethyl-4-piperidinyl) ester; tetrakis(2,2,6,6-tetramethylpiperidin-4-yl)-1,2,3,4-butanetetracarboxylate; benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-, 1-[2-[3-[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropoxy]ethyl]-2,2,6,6-tetramethyl-4-piperidinyl ester; N-(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl)-N′-dodecyloxalamide; tris(2,2,6,6-tetramethylpiperidin-4-yl) nitrilotriacetate; 1,5-dioxaspiro{5,5}undecane-3,3-dicarboxylic acid, bis(1,2,2,6,6-pentamethyl-4-piperidinyl): 1,5-dioxaspiro{5,5}undecane-3,3-dicarboxylic acid, bis(2,2,6,6-tetramethyl-4-piperidinyl); the condensate of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid; the condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-tert-octylamino-2,6-dichloro-1,3,5-triazine; 1,2,3,4-butanetetracarboxylic acid, 1,2,2,6,6-pentamethyl-4-piperidinyl tridecyl ester; tetrakis(2,2,6,6-tetramethylpiperidin-4-yl)-1,2,3,4-butanetetracarboxylate; 1,2,3,4-butanetetracarboxylic acid, 2,2,6,6-tetramethyl-4-piperidinyl tridecyl ester; tetrakis(1,2,2,6,6-pentamethylpiperidin-4-yl)-1,2,3,4-butanetetracarboxylate; mixture of 2,2,4,4-tetramethyl-21-oxo-7-oxa-3.20-diazaspiro(5.1.11.2)-heneicosane-20-propanoic acid-dodecylester and 2,2,4,4-tetramethyl-21-oxo-7-oxa-3.20-diazaspiro(5.1.11.2)-heneicosane-20-propanoic acid-tetradecylester; 1H,4H,5H,8H-2,3a,4a,6,7a,8a-hexaazacyclopenta[def]fluorene-4,8-dione, hexahydro-2,6-bis(2,2,6,6-tetramethyl-4-piperidinyl)-; polymethyl[propyl-3-oxy(2′,2′,6′,6′-tetramethyl-4,4′-piperidinyl)]siloxane; polymethyl[propyl-3-oxy(1′,2′,2′,6′,6′-pentamethyl-4,4′-piperidinyl)]siloxane; copolymer of methylmethacrylate with ethyl acrylate and 2,2,6,6-tetramethylpiperidin-4-yl acrylate; copolymer of mixed C 20  to C 24  alpha-olefins and (2,2,6,6-tetramethylpiperidin-4-yl)succinimide; 1,2,3,4-butanetetracarboxylic acid, polymer with β,β,β′,β′-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diethanol, 1,2,2,6,6-pentamethyl-4-piperidinyl ester; 1,2,3,4-butanetetracarboxylic acid, polymer with β,β,β′,β′-tetramethyl-2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diethanol, 2,2,6,6-tetramethyl-4-piperidinyl ester copolymer; 1,3-benzenedicarboxamide, N,N′-bis(2,2,6,6-tetramethyl-4-piperidinyl; 1,1′-(1,10-dioxo-1,10-decanediyl)-bis(hexahydro-2,2,4,4,6-pentamethylpyrimidine; ethane diamide, N-(1-acetyl-2,2,6,6-tetramethylpiperidinyl)-N′-dodecyl; formamide, N,N′-1,6-hexanediylbis[N-(2,2,6,6-tetramethyl-4-piperidinyl); D-glucitol, 1,3:2,4-bis-O-(2,2,6,6-tetramethyl-4-piperidinylidene)-; 2,2,4,4-tetramethyl-7-oxa-3,20-diaza-21-oxo-dispiro[5.1.11.2]heneicosane; propanamide, 2-methyl-N-(2,2,6,6-tetramethyl-4-piperidinyl)-2-[(2,2,6,6-tetramethyl-4-piperidinyl)amino]-; 7-oxa-3,20-diazadispiro[5.1.11.2]heneicosane-20-propanoic acid, 2,2,4,4-tetramethyl-21-oxo-, dodecyl ester; N-(2,2,6,6-tetramethylpiperidin-4-yl)-β-aminopropionic acid dodecyl ester; N-(2,2,6,6-tetramethylpiperidin-4-yl)-N′-aminooxalamide; propanamide, N-(2,2,6,6-tetramethyl-4-piperidinyl)-3-[(2,2,6,6-tetramethyl-4-piperidinyl)amino]-; mixture of 4-hexadecyloxy- and 4-stearyloxy-2,2,6,6-tetramethylpiperidine; 3-dodecyl-1-(1,2,2,6,6-pentamethylpiperidin-4-yl)pyrrolidine-2,5-dione; 3-dodecyl-1-(1-ethanoyl-2,2,6,6-pentamethylpiperidin-4-yl)pyrrolidine-2,5-dione; bis(2,2,6,6-tetramethylpiperidin-4-yl)succinate; bis(1,2,2,6,6-pentamethylpiperidin-4-yl) n-butyl 3,5-di-tert-butyl-4-hydroxybenzylmalonate; tris(2,2,6,6-tetramethylpiperidin-4-yl) nitrilotriacetate; 1,1′-(1,2-ethanediyl)bis(3,3,5,5-tetramethylpiperazinone); 4-benzoyl-2,2,6,6-tetramethylpiperidine; 4-stearyloxy-2,2,6,6-tetramethylpiperidine; bis(1,2,2,6,6-pentamethylpiperidyl)-2-n-butyl-2-(2-hydroxy-3,5-di-tert-butylbenzyl)malonate; 3-n-octyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5]decan-2,4-dione; bis(1-octyloxy-2,2,6,6-tetramethylpiperidyl)sebacate; bis(1-octyloxy-2,2,6,6-tetramethylpiperidyl)succinate; 8-acetyl-3-dodecyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro[4.5]decane-2,4-dione; 3-dodecyl-1-(2,2,6,6-tetramethylpiperidin-4-yl)pyrrolidin-2,5-dione; 3-dodecyl-1-(1-ethanoyl-2,2,6,6-tetramethylpiperidin-4-yl)pyrrolidin-2,5-dione; 3-dodecyl-1-(1,2,2,6,6-pentamethylpiperidin-4-yl)pyrrolidine-2,5-dione; a mixture of 4-hexadecyloxy- and 4-stearyloxy-2,2,6,6-tetramethylpiperidine; 2-undecyl-7,7,9,9-tetramethyl-1-oxa-3,8-diaza-4-oxospiro[4.5]decane; 1,5-dioxaspiro{5,5}undecane-3,3-dicarboxylic acid, bis(2,2,6,6-tetramethyl-4-piperidinyl) and 1,5-dioxaspiro{5,5}undecane-3,3-dicarboxylic acid, bis(1,2,2,6,6-pentamethyl-4-piperidinyl); N 1 -(p-hydroxyethyl)3,3-pentamethylene-5,5-dimethylpiperazin-2-one; N 1 -tert-octyl-3,3,5,5-tetramethyl-diazepin-2-one; N 1 -tert-octyl-3,3-pentamethylene-5,5-hexamethylene-diazepin-2-one; N 1 -tert-octyl-3,3-pentamethylene-5,5-dimethylpiperazin-2-one; trans-1,2-cyclohexane-bis-(N 1 -5,5-dimethyl-3,3-pentamethylene-2-piperazinone; trans-1,2-cyclohexane-bis-(N 1 -3,3,5,5-dispiropentamethylene-2-piperazinone); N 1 -isopropyl-1,4-diazadispiro-(3,3,5,5)pentamethylene-2-piperazinone; N 1 -isopropyl-1,4-diazadispiro-3,3-pentamethylene-5,5-tetramethylene-2-piperazinone; N 1 -isopropyl-5,5-dimethyl-3,3-pentamethylene-2-piperazinone; trans-1,2-cyclohexane-bis-N 1 -(dimethyl-3,3-pentamethylene-2-piperazinone); N 1 -octyl-5,5-dimethyl-3,3-pentamethylene-1,4-diazepin-2-one; N 1 -octyl-1,4-diazadispiro-(3,3,5,5)pentamethylene-1,5-diazepin-2-one; or mixtures thereof. 
     
     
         21 . A polymeric hollow article according to  claim 18 , wherein the light stabilizer is an ultraviolet light absorber chosen from a 2-hydroxybenzophenone, a 2-(2′-hydroxyphenyl)benzotriazole, a 2-(2′-hydroxyphenyl)-1,3,5-triazine, or mixtures thereof. 
     
     
         22 . A polymeric hollow article according to  claim 21 , wherein the ultraviolet light absorber is a 2-(2′-hydroxyphenyl)-1,3,5-triazine according to Formula (VII): 
       
         
           
           
               
               
           
         
       
       wherein
 each of R 34  and R 35  is independently chosen from optionally substituted C 6 -C 10  aryl, C 1 -C 10  hydrocarbyl-substituted amino, C 1 -C 10  acyl or C 1 -C 10  alkoxyl; and 
 R 36  is present at from 0 to 4 positions of the phenoxy portion of Formula (VII) and in each instance is independently chosen from hydroxyl, C 1 -C 12  hydrocarbyl, C 1 -C 12  alkoxyl, C 1 -C 12  alkoxyester, or C 1 -C 12  acyl. 
 
     
     
         23 . A polymeric hollow article according to  claim 22 , wherein the 2-(2′-hydroxyphenyl)-1,3,5-triazine is chosen from 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4-octyloxyphenyl)-s-triazine (CYASORB® 1164 available from Cytec Industries Inc.); 4,6-bis-(2,4-dimethylphenyl)-2-(2,4-dihydroxyphenyl)-s-triazine; 2,4-bis(2,4-dihydroxyphenyl)-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxy-ethoxy)phenyl]-6-(4-chlorophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxy-4-(2-hydroxy-ethoxy)phenyl]-6-(2,4-dimethylphenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-hydroxyethoxy)phenyl]-6-(4-bromophenyl)-s-triazine; 2,4-bis[2-hydroxy-4-(2-acetoxyethoxy)phenyl]-6-(4-chlorophenyl)-s-triazine; 2,4-bis(2,4-dihydroxyphenyl)-6-(2,4-dimethylphenyl)-s-triazine; 2,4-bis(4-biphenylyl)-6-[2-hydroxy-4-[(octyloxycarbonyl)ethylideneoxy]phenyl]-s-triazine; 2,4-bis(4-biphenylyl)-6-[2-hydroxy-4-(2-ethylhexyloxy)phenyl]-s-triazine; 2-phenyl-4-[2-hydroxy-4-(3-sec-butyloxy-2-hydroxypropyloxy)phenyl]-6-[2-hydroxy-4-(3-sec-amyloxy-2-hydroxypropyloxy)phenyl]-s-triazine; 2,4-bis(2,4-dimethylphenyl)-6-[2-hydroxy-4(-3-benzyloxy-2-hydroxypropyloxy)phenyl]-s-triazine; 2,4-bis(2-hydroxy-4-n-butyloxyphenyl)-6-(2,4-di-n-butyloxyphenyl)-s-triazine; 2,4-bis(2,4-dimethylphenyl)-6-[2-hydroxy-4-(3-nonyloxy-2-hydroxypropyloxy)-5-α-cumylphenyl]-s-triazine; methylenebis-{2,4-bis(2,4-dimethylphenyl)-6-[2-hydroxy-4-(3-butyloxy-2-hydroxypropoxy)phenyl]-s-triazine}; methylene bridged dimer mixture bridged in the 3:5′, 5:5′ and 3:3′ positions in a 5:4:1 ratio; 2,4,6-tris(2-hydroxy-4-isooctyloxycarbonyliso-propylideneoxy-phenyl)-s-triazine; 2,4-bis(2,4-dimethylphenyl)-6-(2-hydroxy-4-hexyloxy-5-α-cumylphenyl)-s-triazine; 2-(2,4,6-trimethylphenyl)-4,6-bis[2-hydroxy-4-(3-butyloxy-2-hydroxypropyloxy)phenyl]-s-triazine; 2,4,6-tris[2-hydroxy-4-(3-sec-butyloxy-2-hydroxypropyloxy)-phenyl]-s-triazine; mixture of 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4-(3-dodecyloxy-2-hydroxypropoxy)phenyl)-s-triazine and 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4-(3-tridecyloxy-2-hydroxypropoxy)phenyl)-s-triazine (Tinuvin® 400 available from Ciba Specialty Chemicals Corp.); 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4(3-(2-ethylhexyloxy)-2-hydroxypropoxy)-phenyl)-s-triazine; 4,6-diphenyl-2-(4-hexyloxy-2-hydroxyphenyl)-s-triazine; or mixtures thereof. 
     
     
         24 . A polymeric hollow article according to  claim 18 , wherein the light stabilizer is a hindered amine light stabilizer and an ultraviolet light absorber. 
     
     
         25 . A polymeric hollow article according to  claim 1 , wherein the stabilizer composition further comprises at least one of:
 (i) a hydroxylamine according to Formula (VIII):   
       
         
           
           
               
               
           
         
         wherein 
         T 1  is chosen from an optionally substituted C 1 -C 36  hydrocarbyl, C 5 -C 12  cycloalkyl, or C 7 -C 9  aralkyl; and 
         T 2  is chosen from hydrogen or T 1 ; or 
         (ii) a tertiary amine oxide according to Formula (IX): 
       
       
         
           
           
               
               
           
         
         wherein 
         each of W 1  and W 2  is independently a C 6 -C 36  hydrocarbyl chosen from straight or branched chain C 6 -C 36  alkyl, C 6 -C 12  aryl, C 7 -C 36  aralkyl, C 7 -C 36  alkaryl, C 6 -C 36  cycloalkyl, C 6 -C 36  alkcycloalkyl, or C 6 -C 36  cycloalkylalkyl; 
         W 3  is a C 1 -C 36  hydrocarbyl is chosen from straight or branched chain C 1 -C 36  alkyl, C 6 -C 12  aryl, C 7 -C 36  aralkyl, C 7 -C 36  alkylaryl, C 5 -C 36  cycloalkyl, C 6 -C 36  alkylcycloalky, and C 6 -C 36  cycloalkylalkyl; 
         with the proviso that at least one of W 1 , W 2  or W 3  contains a R carbon-hydrogen bond; and 
         wherein said alkyl, aralkyl, alkaryl, cycloalkyl, alkcycloalkyl and cycloalkylalkyl groups of W 1 , W 2  and W 3  may be interrupted by from one to sixteen groups chosen from —O—, —S—, —SO—, —SO 2 —, —COO—, —OCO—, —CO—, —NW 4 —, —CONW 4 — or —NW 4 CO—, or wherein said alkyl, aralkyl, alkaryl, cycloalkyl, alkcycloalkyl and cycloalkylalkyl groups of W 1 , W 2  and W 3  are substituted with from one to sixteen groups chosen from —OW 4 , —SW 4 , —COOW 4 , —OCOW 4 , —COW 4 , —N(W 4 ) 2 , —CON(W 4 ) 2 , —NW 4 COW 4  and 5- and 6-membered rings containing the group —C(CH 3 )(CH 2 R x )NL(CH 2 R x )(CH 3 )C—; and 
         wherein 
         W 4  is chosen from hydrogen or C 1 -C 8  alkyl; 
         R x  is chosen from hydrogen or methyl; and 
         L is chosen from C 1 -C 30  alkyl, —C(O)R or —OR, wherein R is C 1 -C 30  straight or branched chain alkyl; or 
         wherein said alkyl, aralkyl, alkaryl, cycloalkyl, alkcycloalkyl and cycloalkylalkyl groups of W 1 , W 2  and W 3  are both interrupted and substituted by any of the groups mentioned above; or 
         wherein said aryl groups of W 1 , W 2  and W 3  are substituted with from one to three substituents independently chosen from halogen, C 1 -C 8  alkyl or C 1 -C 8  alkoxy; or 
         (iii) mixtures of (i) and (ii). 
       
     
     
         26 . A polymeric hollow article according to  claim 25 , wherein the hydroxylamine according to Formula (VIII) is an N,N-dihydrocarbylhydroxylamine wherein each of T 1  and T 2  is independently chosen from benzyl, ethyl, octyl, lauryl, dodecyl, tetradecyl, hexadecyl, heptadecyl or octadecyl; or wherein each of T 1  and T 2  is the alkyl mixture found in hydrogenated tallow amine. 
     
     
         27 . A polymeric hollow article according to  claim 25 , wherein the hydroxylamine according to Formula (VIII) is an N,N-dihydrocarbylhydroxylamine chosen from N,N-dibenzylhydroxylamine; N,N-diethylhydroxylamine; N,N-dioctylhydroxylamine; N,N-dilaurylhydroxylamine; N,N-didodecylhydroxylamine; N,N-ditetradecylhydroxylaamine; N,N-dihexadecylhydroxylamine; N,N-dioctadecylhydroxylamine; N-hexadecyl-N-tetradecylhydroxylamine; N-hexadecyl-N-heptadecylhydroxylamine; N-hexadecyl-N-octadecylhydroxylamine; N-heptadecyl-N-octadecylhydroxylamine; N,N-di(hydrogenated tallow)hydroxylamine; or mixtures thereof. 
     
     
         28 . A polymeric hollow article according to  claim 1 , wherein the hollow article further comprises at least one co-additive chosen from nucleating agents, fillers, reinforcing agents, polymer additives or mixtures thereof. 
     
     
         29 . A polymeric hollow article according to  claim 16 , wherein the polyolefin is at least one of linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), or polypropylene. 
     
     
         30 . A polymeric hollow article according to  claim 1 , wherein the basic co-additive (iii) is at least one of calcium stearate, zinc stearate, magnesium behenate, magnesium stearate, sodium ricinoleate or potassium palmitate. 
     
     
         31 . A polymeric hollow article according to  claim 29 , wherein the polyolefin, chroman-based compound, phosphite or phosphonite, and at least one basic co-additive, and amounts of the chroman-based compound, phosphite or phosphonite, and at least one basic co-additive are selected so that the polyolefin remains stable and retains its optimal mechanical and/or physical properties over a longer period of time in the oven, even in the absence of a sterically hindered amine light stabilizer (HALS). 
     
     
         32 . A polymeric hollow article according to  claim 29 , wherein the polyolefin, chroman-based compound, phosphite or phosphonite, and at least one basic co-additive, and amounts of the chroman-based compound, phosphite or phosphonite compound, and at least one basic co-additive are selected so that at least one of the following results are obtained in a rotational molding operation employed to produce the polymeric hollow article, even in the absence of sterically hindered amine light stabilizers (HALS):
 a maximum mean failure energy (MFE) of the polymeric article is reached at a shorter time interval;   a higher MFE of the polymeric article is retained over a longer heating time; or   a processing window is enlarged to a peak internal air temperature (PIAT) of up to 452° F. with yellowness index of the article remaining substantially unchanged up to a PIAT of 452° F.   
     
     
         33 . A polymeric hollow article according to  claim 32 , wherein the results are obtained even in the absence of antistatic agents. 
     
     
         34 . A stabilizer composition for use in producing a polymeric hollow article in a rotomolding process, the stabilizer composition comprising a stabilizing amounts of:
 (i) at least one chroman-based compound according to Formula (V):   
       
         
           
           
               
               
           
         
       
       wherein
 R 21  is present at from 0 to 4 positions of the aromatic portion of Formula (V) and in each instance is independently chosen from:
 C 1 -C 12  hydrocarbyl; 
 NR′R″, wherein each of R′ and R″ is independently chosen from H or C 1 -C 12  hydrocarbyl; or 
 OR 27 , wherein R 27  is chosen from C 1 -C 12  hydrocarbyl, COR′″, or Si(R 28 ) 3 , 
 
 wherein R′″ is chosen from H or C 1 -C 20  hydrocarbyl; and wherein
 R 28  is chosen from C 1 -C 12  hydrocarbyl or alkoxy; 
 
 R 22  is chosen from H or C 1 -C 12  hydrocarbyl; 
 R 23  is chosen from H or C 1 -C 20  hydrocarbyl; 
 each of R 24 -R 25  is independently chosen from H, C 1 -C 12  hydrocarbyl or OR″″, 
 
       wherein R″″ is chosen from H or C 1 -C 12  hydrocarbyl; and
 R 26  is H or a bond which together with R 25  forms ═O; 
 (ii) at least one phosphite or phosphonite; and 
 (iii) a basic co-additive selected from alkali metal or alkaline metal salts of higher fatty acids.