Process for the production of impact-modified polyalkylene terephthalate/polycarbonate compositions

Abstract

A process for the production of impact-modified composition that contains polyalkylene terephthalate and polycarbonate resins is disclosed. The process includes (i) in a first step combining in the melt at 90 to 175° C. glycidyl ester with at least one member selected from the first group consisting of polyalkylene terephthalate and polycarbonate to obtain a molten mixture, said member in powder form, and (ii) in a subsequent step combining the molten mixture with at least one component selected from the second group consisting of polyalkylene terephthalate and polycarbonate to obtain a composition. The composition is characterized in high gloss value.

1 . A process for the production of impact-modified composition that contains polyalkylene terephthalate and polycarbonate resins, comprising
 (i) in a first step combining a glycidyl ester in the melt from 90 to 175° C. with at least one member selected from the first group consisting of polyalkylene terephthalate and polycarbonate to obtain a mixture, said member in powder form, and   (ii) in a subsequent step combining the mixture with at least one component selected from the second group consisting of polyalkylene terephthalate and polycarbonate to obtain an impact-modified PC/Polyester composition.   
     
     
         2 . The process of  claim 1  wherein the melt is at 100 to 150° C. 
     
     
         3 . The process of  claim 1  wherein the composition obtained includes
 A) 4 to 95 parts by weight of polyalkylene terephthalate, 
 B) 4 to 95 parts by weight of aromatic polycarbonate, 
 C) 1 to 30 parts by weight of glycidyl ester and 
 D) 0 to 20 parts by weight of conventional additives and processing aids. 
 
     
     
         4 . The process of  claim 1  wherein said member of said first group is polyalkylene terephthalate having mean particle size (d 50 ) of 600 to 700 μm. 
     
     
         5 . The process of  claim 4  wherein said subsequent step is carried out in the melt at 220 to 300° C. 
     
     
         6 . The process of  claim 3  wherein said member of said first group is polyalkylene terephthalate having a mean particle size (d 50 ) of 600 to 700 μm and wherein said subsequent step is carried out at 220 to 300° C. 
     
     
         7 . The process of  claim 1  wherein said glycidyl ester conforms to formula (IV) 
       
         
           
           
               
               
           
         
         wherein 
         is H or C 1 - to C 6 -alkyl, 
         R 2  is alkyl or aryl, 
         a+b+c=100, 
         a is 50 to 99.5, 
         b is 0.5 to 25 and 
         c is 0 to 50. 
       
     
     
         8 . An article of manufacture prepared by the process of  claim 1 .