| 摘要 |
PURPOSE: A high impact polystyrene(HIPS) resin having excellent heat resistance and drop impact resistance is provided. A process for producing the HIPS resin is also provided. CONSTITUTION: The HIPS resin having excellent heat resistance and drop impact resistance is produced by a continuous bulk polymerization process, and comprises 70-90 parts by weight of a polymer(I) consisting of a styrene monomer having a rubber particle diameter of 0.5-1.0 microns and a polybutadiene rubber(I) containing at least 95 wt% of 1,4-cis form, and 10 to 30 parts by weight of a polymer(II) consisting of a styrene monomer having a rubber particle diameter of 1.0 to 1.5 microns and a polybutadiene rubber(II) containing 40 wt% or less of 1,4-cis form.
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