Patent ID: 8703029
Filing Date: 2014-04-22
Classification: B29C,C08G,C08K,C08L

Abstract:
1. A method for producing a polyarylene sulfide resin composition having a melt viscosity of 150 to 330 Pa·s (at a temperature of 310° C. and a shear rate of 1200/sec) and a chlorine amount of 950 ppm or less, comprising melt kneading (A) polyarylene sulfide resin, (B) an inorganic filler and (C) an alkoxysilane compound to produce the polyarylene sulfide resin composition, in which extrusion comprises the following steps: supplying (A) polyarylene sulfide resin having a melt viscosity of 80 to 400 Pa·s (at a temperature of 310° C. and a shear rate of 1200/sec) and a chlorine content of 1000 to 2000 ppm through (1) raw material-feeding port of an extruder, supplying (C) alkoxysilane compound before plasticizing the resin, plasticizing the supplied resin at (2) plasticizing zone, melt-kneading the plasticized resin at (3) kneading zone-a, feeding (B) inorganic filler into the melt-kneaded resin through (6) auxiliary material-feeding port, then, kneading the melt-kneaded resin and the inorganic filler in (7) kneading zone-b, degassing the resin under reduced pressure through (8) vacuum vent, and extruding the polyarylene sulfide resin composition obtained by kneading from (9) die mounted at an outlet of the extruder, the above defined steps being performed in the order, wherein the extrusion in (3) kneading zone-a and (7) kneading zone-b is conducted under the condition of [shear rate (1/sec)×kneading time (sec)=1600-6000 (the kneading time is the total kneading time in (3) kneading zone-a and (7) kneading zone-b)].