| 摘要 |
PROBLEM TO BE SOLVED: To provide a resin composition which has a well balanced heat resistance, moldability, impact resistance and rigidity and is especially suitable for use in food containers which are heated in microwave ovens. SOLUTION: The titled composition comprises (a) from 60 to 83 pts.wt. styrene/methacrylic acid resin having a weight average molecular weight of from 250,000 to 800,000, (b) from 40 to 17 pts.wt. impact-resistant styrene resin having a methanol-soluble content of smaller than 3 wt.% [provided that (a)+(b)=100 pts.wt.] and (c) from 0 to 15 pts.wt. methyl methacrylate/butadiene/ styrene rubber and/or styrene/butadiene block elastomer. Preferably, the gel content of the impact resistant styrene resin with a methanol-soluble content of smaller than 3 wt.% is from 14 to 35 wt.%, and the volume average size of the rubber particle is from 1.5 to 5μm. |
