The invention relates to a preparation method of a high-heat-resistance low-warpage glass fiber-reinforced flame-retardant PBT engineering plastic. Firstly, a premix is added into a twin-screw extruder for melting, then a flame retardant and glass fiber are respectively fed into the twin-screw extruder from side feeding ports to be mixed with the melted premix, after mixing, strips are extruded from a die of the twin-screw extruder, and finally the strips are cooled in a cooling water tank and pelletized by a pelletizer to obtain the high-heat-resistance low-warpage glass fiber-reinforced flame-retardant PBT engineering plastic; the premix is obtained by uniformly mixing PBT resin II, low-warpage PBT masterbatch, compatibilizer, crystallization-inhibiting polymer, flame-retardant synergist, inorganic filler, nucleating agent and other auxiliaries; the low-warpage PBT masterbatch is obtained by uniformly mixing PBT resin I, transesterification inhibitor, transesterification-inhibiting synergist and other auxiliaries, and then performing melt extrusion and granulation. The invention solves the warpage problem of glass fiber-reinforced flame-retardant PBT engineering plastics and has a high heat distortion temperature.
Area Code: CN
Application Number: CN202411457096.4
