Stabilized acrylonitrile/styrene/acrylate molding compositions

Abstract

The present invention relates to a thermoplastic molding composition containing: a) from 3 to 94.6% by weight of one or more styrene copolymers as component A, b) from 5 to 95.2% by weight of one or more impact-modifying graft rubbers having no olefinic double bond in the rubber phase as component B c) from 0.2 to 0.9% by weight of a compound of the formula (I) as component C: d) from 0.2 to 0.7% by weight of a mixture of the formula (II) as component D: and optionally a mixture of a compound of the formula (III) as component E: a compound of the formula (III): or a compound of the formula (V): one or more additives, where these differ from components C, D, and E, as component F, and fibrous or particulate fillers as component G. The invention also relates to a process for producing the thermoplastic molding composition and a process for producing a molding, foil, or fiber which utilizing the thermoplastic molding composition. The invention further relates to a molding, fiber, or foil made of the thermoplastic molding composition.

1 - 18 . (canceled) 
     
     
         19 . A thermoplastic molding composition comprising:
 a) from 3 to 94.6% by weight of one or more styrene copolymers as component A   b) from 5 to 95.2% by weight of one or more impact-modifying graft rubbers having no olefinic double bond in the rubber phase as component B   c) from 0.2 to 0.9% by weight of a compound of the formula (I) as component C:   
       
         
           
           
               
               
           
         
         d) from 0.2 to 0.7% by weight of a mixture of the formula (II) as component D: 
       
       
         
           
           
               
               
           
         
         e) from 0 to 0.5% by weight of a compound of the formula (III) as component E: 
       
       
         
           
           
               
               
           
         
       
       or from 0 to 0.5% by weight of a compound of the formula (V): 
       
         
           
           
               
               
           
         
         f) from 0 to 10% by weight of one or more additives, where these differ from components C, D, and E, as component F, and 
         g) from 0 to 40% by weight of fibrous or particulate fillers as component G, 
       
       where each of the % by weight values is based on the sum weight of components A to G. 
     
     
         20 . The thermoplastic molding composition according to  claim 19 , wherein the swelling index of component B is from 6 to 20. 
     
     
         21 . The thermoplastic molding composition according to  claim 19 , which uses, as component A, a copolymer of acrylonitrile, styrene, and/or α-methylstyrene, phenylmaleimide, methyl methacrylate, or a mixture of these. 
     
     
         22 . The thermoplastic molding composition according to  claim 19 , which uses, as component B, a mixture made of an acrylate-styrene-acrylonitrile (ASA) graft polymer which comprises from 55 to 80% by weight, based on B, of an elastomerically crosslinked acrylate polymer B1 and comprises from 45 to 25% by weight, based on B, of a graft shell B2 made of a vinylaromatic monomer and made of one or more polar, copolymerizable, ethylenically unsaturated monomers, and optionally made of a further copolymerizable, ethylenically unsaturated monomer, in a ratio by weight of from 80:20 to 65:35. 
     
     
         23 . The thermoplastic molding composition according to  claim 19 , wherein B1 is composed of from 0.01 to 20% by weight, of a crosslinking monomer. 
     
     
         24 . The thermoplastic molding composition according to  claim 23 , wherein B1 is composed of from 0.1 to 5% by weight of butylene diacrylate, divinylbenzene, butanediol dimethacrylate, trimethylolpropane tri(meth)acrylate, diallyl methacrylate, diallyl maleate, diallyl fumarate, triallyl methacrylate, or triallyl isocyanurate as crosslinking monomer. 
     
     
         25 . The thermoplastic molding composition according to  claim 23 , wherein B1 is composed of from 0.1 to 5% by weight of diallyl phthalate, allyl methacrylate and/or dihydrodicyclopentadienyl acrylate as crosslinking monomer. 
     
     
         26 . The thermoplastic molding composition according to  claim 19 , wherein the average particle diameter of component B is from 50 to 1200 nm. 
     
     
         27 . The thermoplastic molding composition according to  claim 19 , wherein component A can comprise from 0 to 20% by weight of polymethyl methacrylate. 
     
     
         28 . The thermoplastic molding composition according to  claim 19 , which uses components C and D in a ratio by weight of from 3:1 to 1:1 and components D and E in a ratio by weight of from 2:1 to 0.5:1. 
     
     
         29 . The thermoplastic molding composition according to  claim 19 , which comprises from 0 to 1.5% by weight of phthalate or adipate. 
     
     
         30 . The thermoplastic molding composition according to claim  1 , wherein component B1 comprises from 2 to 99% by weight of butyl acrylate. 
     
     
         31 . The thermoplastic molding composition according to  claim 19 , which uses styrene or α-methylstyrene as vinylaromatic component in B2. 
     
     
         32 . The thermoplastic molding composition according to  claim 19 , which uses, as ethylenically unsaturated component in B2, acrylonitrile and/or alkyl methacrylates and/or alkyl acrylates having C 1 -C 8 -alkyl radicals. 
     
     
         33 . The thermoplastic molding composition according to  claim 19 , which uses component B in monomodal or bimodal form. 
     
     
         34 . A process for producing thermoplastic molding compositions according to  claim 19 , which comprises mixing components A to F with one another at temperatures of from 100 to 300° C. and at a pressure of from 1 to 50 bar in any desired sequence, and then kneading and extruding the material. 
     
     
         35 . The process for producing thermoplastic molding compositions according to  claim 34 , wherein a portion of component B is first premixed with a portion of component A to give a masterbatch in a ratio of from 1:1 to 1:2, and then the material is mixed with further components A to F to give the thermoplastic molding composition. 
     
     
         36 . A process for producing a molding, foil, or fiber which comprises utilizing the thermoplastic molding composition according to  claim 19 . 
     
     
         37 . A process for producing a molding for motor-vehicle components or for parts of electronic equipment which comprises utilizing a thermoplastic molding composition according to  claim 19 . 
     
     
         38 . A molding, fiber, or foil made of a thermoplastic molding composition according to  claim 19 .