Stabilizer mixtures

Abstract

A stabilizer mixture containing (A) a sterically hindered amine compound, (B) an organic salt of Ca or an inorganic salt of Ca and (C) an organic salt of Mg, an inorganic salt of Mg, an organic salt of Zn or an inorganic salt of Zn; with the proviso that component (C) is Mg-hydroxide-carbonate, Zn-hydroxide-carbonate or dolomite, when component (B) is calcium stearate.

1 . A stabilizer mixture containing 
 (A) a sterically hindered amine compound,    (B) an organic salt of Ca or an inorganic salt of Ca and    (C) an organic salt of Mg, an inorganic salt of Mg, an organic salt of Zn or an inorganic salt of Zn;    with the proviso that component (C) is Mg-hydroxide-carbonate, Zn-hydroxide-carbonate or dolomite, when component (B) is calcium stearate.    
     
     
         2 . A stabilizer mixture according to  claim 1  wherein the sterically hindered amine compound corresponds to a compound containing at least one group of the formula (I) or (II)  
       
         
           
           
               
               
           
         
       
       in which G is hydrogen or methyl, and 
 G 1  and G 2 , independently of one another, are hydrogen, methyl or together are a substituent ═O.  
 
     
     
         3 . A stabilizer mixture according to  claim 1 , wherein the sterically hindered amine compound is  
       
         
           
           
               
               
           
         
       
       with m 1  being 5.1;  
       
         
           
           
               
               
           
         
       
       with m 4  being 4.5;  
       
         
           
           
               
               
           
         
       
       a product obtainable by reacting an intermediate product, obtained by reaction of a polyamine of the formula (100a-I) with cyanuric chloride, with a compound of the formula (100-I), 
         
       
         
           
           
               
               
           
         
       
       with m 21  being 5.8;  
       
         
           
           
               
               
           
         
       
     
     
         4 . A stabilizer mixture according to  claim 1  wherein the organic salt of Ca is Ca-stearate, Ca-lactate or Ca-stearoyl-lactate and the inorganic salt of Ca is Ca-oxide or Ca-hydroxide.  
     
     
         5 . A stabilizer mixture according to  claim 1  wherein component (C) is hydrotalcite, dolomite, Zn-hydroxide-carbonate, Mg-hydroxide-carbonate, Zn-oxide, Mg-oxide, Zn-hydroxide, Mg-hydroxide, Zn-stearate, Mg-stearate, Zn-laurate, Mg-laurate, Zn-acetylacetonate, Mg-acetylacetonate, Zn-acetate or Mg-acetate.  
     
     
         6 . A stabilizer mixture according to  claim 1 , wherein 
 component (B) is Ca oxide and component (C) is Mg stearate,    component (B) is Ca oxide and component (C) is Zn stearate,    component (B) is Ca oxide and component (C) is hydrotalcite,    component (B) is Ca hydroxide and component (C) is Mg stearate, or    component (B) is Ca hydroxide and component (C) is Zn stearate.    
     
     
         7 . A stabilizer mixture according to  claim 1 , containing additionally 
 (D1) a pigment or    (D2) an UV absorber or    (D3) a pigment and an UV absorber.    
     
     
         8 . A stabilizer mixture according to  claim 7  wherein the pigment is titanium dioxide, zinc oxide, carbon black, cadmium sulfide, cadmium selenide, chromium oxide, iron oxide, lead oxide, an azo pigment, an anthraquinone, a phthalocyanine, a tetrachloroisoindolinone, a quinacridone, an isoindoline, a perylene or a pyrrolopyrrole.  
     
     
         9 . A stabilizer mixture according to  claim 7  wherein the UV absorber is a 2-(2′-hydroxyphenyl)benzotriazole, a 2-hydroxybenzophenone, an ester of substituted or unsubstituted benzoic acid, an acrylate, an oxamide, a 2-(2-hydroxyphenyl)-1,3,5-triazine, a monobenzoate of resorcinoi or a formamidine.  
     
     
         10 . A composition comprising a polyolefin and a stabilizer mixture according to  claim 1 .  
     
     
         11 . A composition according to  claim 10  wherein the polyolefin is polyethylene, polypropylene, a polyethylene copolymer or a polypropylene copolymer.  
     
     
         12 . A composition comprising a polyolefin and a stabilizer mixture containing 
 (A) a sterically hindered amine compound selected from the group consisting of 
 the compounds 13, 14, 36-a, 36-b, 36-d, 96-I, 96-II, 100-A, 101-I, 105 and 106 as defined in claim  3 ;  
   (B) an organic salt of Ca or an inorganic salt of Ca; and    (C) an organic salt of Mg, an inorganic salt of Mg, an organic salt of Zn or an inorganic salt of Zn;    with the proviso that the polyolefin is polypropylene, when component (A) of the stabilizer mixture is the compound 96-I, 96-II or 100-A.    
     
     
         13 . A method for stabilizing a polyolefin against degradation induced by light, heat or oxidation, which comprises incorporating into the polyolefin a stabilizer mixture according to  claim 1.