| abstract |
PROBLEM TO BE SOLVED: To provide styrene-based expandable resin particles having excellent expandability, exhibiting high mechanical strength when molded, and having extremely low residual styrene monomer and benzene contents. To do. SOLUTION: Residual styrene monomer in styrene foamable resin particles is 1 to 300 ppm and benzene pm or less and SP value compatible with styrene of 7-1 0 to 0.1% by weight of a plasticizer and a foaming agent. |