Patent ID: 8912261

Claim:
A process for preparing a halogen-free melt-filtered polymer composition, comprising: filtering the melted composition through a filter to remove particulate impurities that are visible to the naked eye from a film fabricated with the composition which is produced in the process, wherein the throughput for making the composition is at least 20 kg/hr and wherein the composition comprises: (a) 60 to 90 percent by weight of a poly(phenylene ether); (b) 3 to 23 percent by weight of a styrenic polymer; (c) 5-11 percent by weight of a halogen-free flame retardant comprising at least one organic phosphate flame retardant, wherein the composition has: (i) a melt viscosity of 620 Pa·s or less as measured according at 280° C. and 1500 s −1 ; and (ii) a heat deflection temperature that is 135° C. or more as measured according to ASTM D648 on 6.4 mm thick bars at 1.82 MPa.