| 摘要 |
Provided is a method for preparing an extruded styrene foam having a low density, a low thermal conductivity, an excellent heat insulation and satisfactory physical properties. A method comprises the steps of injecting 0.1-5 wt% of a graphite powder, 1-5 wt% of HBCD as a bromine-based flame retardant, and 0.3-4 wt% of a nucleating agent based on the weight of a polystyrene resin into an extruder and melting them at a temperature of 180-240 deg.C; injecting 3-15 wt% of a foaming agent; and extruding the mixture at a temperature of 100-140 deg.C to prepare an extruded styrene foam. Preferably the HBCD is EPS (expanded polystyrene foam) or XPS (extruded polystyrene foam); and the nucleating agent is talc, calcium carbonate or silica.
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