| 摘要 |
PROBLEM TO BE SOLVED: To provide a styrenic resin sheet whose water-repellent property is not deteriorated, even when compounded with a metal oxide. SOLUTION: This water-repellent styrenic resin sheet having a critical surface contact angle (γc ) of <35 dyne/cm is obtained by forming a resin composition comprising (a) 70-99 wt.% of a butadiene-modified styrenic resin or a mixture of the butadiene-modified styrenic resin with a styrenic resin, (b) 1-30 wt.% of a metal oxide, and (c) 0.01-5 wt.% of an aliphatic carboxylic acid metal salt or ethylene bisstearylamide. Therein, in the component (a), the polystyrene has a weight-average mol.wt. of 100,000-300,000, and the butadiene-based polymer has an average particle diameter of 1-20μm and is contained in an amount of 3-10 wt.%.
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