| 摘要 |
PURPOSE:To provide a composition having excellent low-temperature mechanical strength, by adding a specific white mineral oil to a styrene polymer. CONSTITUTION:(A) 100pts.wt. of a styrene polymer is compounded with (B) 0.1-10pts.wt. of a white mineral oil having a pour point of <=-20 deg.C and a viscosity index of >=85. The component B is preferably added to the styrene monomer in the polymerization of the component A, and the polymerization is carried out preferably by bulk-suspension polymerization, etc.
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