Stabilizer mixtures

Abstract

A stabilizer mixture containing (A) for example a compound of the formula (A-I) wherein R 1 is hydrogen or C 1 -C 4 alkyl, R 2 is a direct bond or C 1 -C 10 alkylene and n 1 is a number from 2 to 50; (B) a sterically hindered amine compound; and (C) anatase; with the proviso that the component (B) is different from a compound of the formula (A-I).

1 . A light stabilizer mixture containing 
 (A) a compound of the formula (A-I)                        wherein R 1  is hydrogen or C 1 -C 4 alkyl, R 2  is a direct bond or C 1 -C 10 alkylene and n 1  is a number from 2 to 50; or      at least one compound of the formulae (A-II-a) and (A-II-b)                          wherein n 2  and n 2 * are a number from 2 to 50; or    a compound of the formula (A-III)                          wherein R 3  and R 4  independently of one another are hydrogen or C 1 -C 8 alkyl, or R 3  and R 4  together form a C 5 -C 11 alkylene group, the variables n 2 ** are independently of one another a number from 1 to 50;    (B) a sterically hindered amine compound; and    (C) anatase;    with the proviso that the component (B) is different from a compound of the formula (A-I), (A-II-a), (A-II-b) and (A-III) and with the proviso that the composition is essentially free of a halogenated hydrocarbyl phosphate or phosphonate ester flame retardant.    
     
     
         2 . A light stabilizer mixture according to  claim 1  wherein the component (A) is a compound of the formula (A-I) with R 1  being hydrogen, R 2  being ethylene and n 1  being a number from 2 to 20; or 
 at least one compound of the formulae (A-II-a) and (A-II-b) with n 2  and n 2 * being a number from 2 to 20; or    a compound of the formula (A-III) with the radicals R 3  and R 4  together forming undecamethylene and the variables n 2 ** independently of one another being a number from 1 to 20.    
     
     
         3 . A light stabilizer mixture according to  claim 1  wherein the component (A) is a compound of the formula (A-I) with R 1  being hydrogen, R 2  being ethylene and n, being a number from 2 to 20.  
     
     
         4 . A light stabilizer mixture according to  claim 1  wherein the component (B) is 
 di(2,2,6,6-tetramethylpiperidin-4-yl) sebacate,    di(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate,    di(1,2,2,6,6-pentamethylpiperidin-4-yl) sebacate,    8-acetyl-3-dodecyl-1,3,8-triaza-7,7,9,9-tetramethylspiro[4.5]decane-2,4-dione,    di(1,2,2,6,6-pentamethylpiperidin-4-yl) butyl(3,5-di-tert-butyl-4-hydroxybenzyl) malonate,                          4-stearoyloxy-2,2,6,6-tetramethylpiperidine,    1-(2,2,6,6-tetramethylpiperidin-4-ylamino)-2-(2,2,6,6-tetramethylpiperidin-4-ylaminocarbonyl)ethane,                          2,2,4,4-tetramethyl-7-oxa-3,20-diaza-21-oxodispiro[5.1.11.2]heneicosane,                          with R 0  being C 12 -C 14 alkyl,    1,2,3,4-tetrakis[1,2,2,6,6-pentamethylpiperidin-4-yloxycarbonyl]butane,    1,2,3,4-tetrakis[2,2,6,6-tetramethylpiperidin-4-yloxycarbonyl]butane,    bis[11,2,2,6,6-pentamethylpiperidin-4-yloxycarbonyl]-bis[tridecyloxycarbonyl]butane,    bis[2,2,6,6-tetramethylpiperidin-4-yloxycarbonyl]-bis[tridecyloxycarbonyl]butane,    2-(2,2,6,6-tetramethylpiperidin-4-ylamino)-2-(2,2,6,6-tetramethylpiperidin-4-ylaminocarbonyl)propane,                          1,6-bis[N-(2,2,6,6-tetramethylpiperidin-4-yl)formylamino]hexane,                                                with m 21  being a number from 1 to 20,                          with m 4  being a number from 2 to 50,                          with m 4  being a number from 2 to 50,                          with R′ being                          with m 12  being a number from 2 to 50,                          with m 12  being a number from 2 to 50,                          with m 4  being a number from 2 to 50,                          wherein m 11 * is a number from 2 to 50, the radicals R* independently of one another are ethyl or 2,2,6,6-tetramethylpiperidin-4-yl, with the proviso that at least 50% of the radicals R* are 2,2,6,6-tetramethylpiperidin-4-yl and the remaining radicals R* are ethyl,                          with m 19  being a number from 1 to 25 and G 11  being hydrogen or methyl,                          with m 19  being a number from 1 to 25 and G 11  being hydrogen or methyl,                          with m 17  being a number from 1 to 20,                          with m 17  being a number from 1 to 20,                          with m 19  being a number from 1 to 25 and G 11  being hydrogen or methyl, or    a product obtainable by reacting an intermediate product, obtained by reaction of a polyamine of the formula (100a) with cyanuric chloride, with a compound of the formula (100b)                          in which m′ 20 , m″ 20  and m′″ 20 , independently of one another, are a number from 2 to 12,    G 36  is hydrogen, C 1 -C 12 alkyl, C 5 -C 12 cycloalkyl, phenyl or C 7 -C 9 phenylalkyl, and    G 11  is hydrogen or methyl.    
     
     
         5 . A light stabilizer mixture according to  claim 1  wherein the component (B) is 
 di(2,2,6,6-tetramethylpiperidin-4-yl) sebacate,    di(1,2,2,6,6-pentamethylpiperidin-4-yl) sebacate,                          with m 4  being a number from 2 to 50,                          with m 4  being a number from 2 to 50,                          with m 12  being a number from 2 to 50,    or                          with m 12  being a number from 2 to 50.    
     
     
         6 . A light stabilizer mixture according to  claim 1  wherein the component (A) is  
       
         
           
           
               
               
           
         
       
       with n 1  being a number from 2 to 20, and 
 the component (B) is  
 di(2,2,6,6-tetramethylpiperidin-4-yl) sebacate;  
                     
 with m 4  being a number from 2 to 50;  
                     
 with m 12  being a number from 2 to 50;  
                     
 with R′ being  
                     
 or  
 a product obtainable by reacting an intermediate product, obtained by reaction of a polyamine of the formula (100a-1) with cyanuric chloride, with a compound of the formula (100b-1) (100a-1)  
                     
 
     
     
         7 . (canceled)  
     
     
         8 . A composition comprising an organic material subject to degradation induced by light and a light stabilizer mixture according to  claim 1 .  
     
     
         9 . A composition according to  claim 8  wherein the organic material is a synthetic polymer.  
     
     
         10 . A composition according to  claim 8  wherein the organic material is a polyolefin.  
     
     
         11 . A composition according to  claim 8  wherein the organic material is polyethylene, polypropylene, a polyethylene copolymer or a polypropylene copolymer.  
     
     
         12 . A method for stabilizing an organic material against degradation induced by light, which comprises incorporating into the organic material a light stabilizer mixture according to  claim 1 .  
     
     
         13 . A light stabilizer mixture containing 
 (A) a compound of the formula (A-I)                        wherein R 1  is hydrogen or C 1 -C 4 alkyl, R 2  is a direct bond or C 1 -C 10 alkylene and n 1  is a number from 2 to 50; or    at least one compound of the formulae (A-II-a) and (A-II-b)                          wherein n 2  and n 2 * are a number from 2 to 50; or    a compound of the formula (A-III)                          wherein R 3  and R 4  independently of one another are hydrogen or C 1 -C 8 alkyl, or R 3  and R 4  together form a C 5 -C 11 alkylene group, the variables n 2 ** are independently of one another a number from 1 to 50;      (B) a sterically hindered amine compound; and    (C) anatase;    with the proviso that the component (B) is different from a compound of the formula (A-I), (A-II-a), (A-II-b) and (A-II) and with the proviso that the light stabilizer mixture is essentially free of a flame retardant.