Polycarbonate substrates

Abstract

Polycarbonate substrates having low concentration of defects are disclosed. The substrates are suitable for producing molded articles characterized by low cloudiness.

1 - 8 . Cancelled  
     
     
         9 . A process of making an article selected from the first group consisting of discs, motor-vehicle glazing, headlamp diffusers and sheets comprising obtaining a polycarbonate resin having a concentration of optically detectable surface defects that is fewer than 250 defects per m 2 , measured on an extruded film of 200 μm in thickness and forming the article by a process selected from the second group consisting of injection molding, extrusion and extrusion blow molding.  
     
     
         10 . The process of  claim 9  wherein the concentration is fewer than 150 defects per m 2 .  
     
     
         11 . The sheet prepared by the process of  claim 9 .  
     
     
         12 . The disc prepared by the process of  claim 9 .  
     
     
         13 . The headlamp diffuser prepared by the process of  claim 9 .  
     
     
         14 . The glazing prepared by the process of  claim 9 .  
     
     
         15 . The sheet prepared by the process of  claim 10 .  
     
     
         16 . The disc prepared by the process of  claim 10 .  
     
     
         17 . The headlamp diffuser prepared by the process of  claim 10 .  
     
     
         18 . The glazing prepared by the process of  claim 10 .  
     
     
         19 . The sheet of  claim 11  characterized in having cloudiness of less than 0.5%.  
     
     
         20 . The disc of  claim 12  characterized in having cloudiness of less than 0.5%.  
     
     
         21 . The headlamp diffuser of  claim 13  characterized in having cloudiness of less than 0.5%.  
     
     
         22 . The glazing of  claim 14  characterized in having cloudiness of less than 0.5%.