| 摘要 |
PURPOSE:To provide the titled composition having extremely excellent gloss, transparency, whiteness and dyeability as well as high flame retardancy, by adding a specific metal-containing water-soluble compound to a mixture obtained by the aqueous polymerization of acrylonitrile and a vinyl monomer. CONSTITUTION:A compound selected from metal-containing water-soluble compounds and their derivatives which lose their water-solubility by the pH adjustment or reaction with acid or alkali or by the dilution or reaction with water and form gelatinous precipitate or colloidal fine particles (including the compounds of tin, antimony, bismuth, iron, nickel, zirconium, titanium or zinc) is added to a polymerization reaction mixture obtained by the aqueous polymerization of 30-70wt% of acrylonitrile, 70-30wt% of a halogen-containing vinyl monomer and 0-10wt% of a vinyl monomer containing sulfonic acid group. The amount of the additive is 0.1-8wt%, in terms of metal, based on the polymer.
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