| 摘要 |
PURPOSE:To provide a resin particle containing a specific amount of an addition reaction product of a D-sorbito-halobenzaldehyde and a lower alkyl-substituted benzaldehyde, dischargeable from a polymerization impregnation vessel at a high temperature, having improved productivity owing to the elimination of the need of low-temperature aging treatment, etc., and capable of giving a good foamed article. CONSTITUTION:Thermoplastic resin particles (e.g. styrene resin particles) are compounded with a foaming agent consisting of a hydrocarbon having a boiling point lower than the softening point of the resin and further with 0.005-0.1wt.% (preferably 0.01-0.05wt.%) of an addition reaction product of a D-sorbito- halobenzaldehyde and a lower alkyl-substituted benzaldehyde and 0.05-0.5wt.% (preferably 0.1-0.3wt.%) of a fatty acid amide. |
