Patent ID: 7244813
Filing Date: 2007-07-17
Classification: C08G,C08L,G11B,Y10T

Abstract:
1. A method of purifying a polymeric material, comprising: melt blending poly(arylene ether) and poly(alkenyl aromatic) in an extruder to form a melt; and melt filtering the melt through a melt filtration system to produce a filtered polymeric material; wherein the melt has a residence time in the extruder of less than or equal to about 1 minute; wherein the melt filtration system is maintained at a temperature of about 280° C. to about 380° C.; and wherein the filtered polymeric material is substantially free of visible particulate impurities such that a ten gram sample of polymeric material dissolved in fifty milliliters of chloroform exhibits fewer than 5 visible specks when viewed with the aid of a light box.