| 摘要 |
PURPOSE:To obtain a cushioning material or a heat-insulation material effective in preventing the accumulation of electrostatic charge and having excellent flame-retardance and heat-insulation by treating foamed polystyrene with an agent such as fuming sulfuric acid, chlorosulfonic acid or fluorosulfonic acid and converting the treated product to an inorganic or organic salt. CONSTITUTION:A foamed polystyrene is treated with one or more kinds of acid selected from fuming sulfuric acid, chlorosulfonic acid, fluorosulfonic acid and sulfur trioxide and neutralizing the acid-treated product to a salt with an alkali or alkaline-earth metal hydroxide, etc. |
