| 摘要 |
PROBLEM TO BE SOLVED: To provide a clear polystyrene resin composition which has good clarity and processibility and can greatly decrease dirt on a metal mold in the molding step. SOLUTION: This composition contains (I) 100 pts.wt. clear polystyrene resin and (II) 0.01-4 pts.wt. pentaerythritol ester compound. The content of a low-mol- wt. polymer having a mol.wt. lower than 350 and contained in a dichloromethane soluble component of the resin (I) is 2.0 wt.% or lower. In the composition, the content X (wt.%) of the pentaerythritol ester compound and the content Y (pts.wt.) of the low-mol.-wt. polymer satisfy the relation represented by: 0.52<X+2Y<4.50.
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