| 摘要 |
PROBLEM TO BE SOLVED: To prevent the yellowing and coloration of a resin sheet in a thermoforming process without damaging various physical properties of a styrenic resin molded product when a betaine type antistatic agent is used by adding a specific amt. of a specific oxidation inhibitor to a styrenic resin. SOLUTION: A styrenic resin sheet molded product is obtained by subjecting a resin sheet molded from a styrenic resin consisting of 5-30wt.% of a rubbery polymer and 0-50wt.% of a cyanic vinyl monomer unit to a thermoforming process and coating the surface of the molded product with a betaine type antistatic agent. In this case, one or two kinds of 0.01-below 1.1 pts.wt. of oxidation inhibitors represented by formulae I-V (wherein tBu is a tertiary butyl group and R is a 2,6-tertiary butylphenol group) is added to 100 pts.wt. of the styrenic resin forming the resin sheet. |
