| 摘要 |
PURPOSE:To obtain a composition giving a foamed article containing fine and uniform cells and having high degree of expansion and smooth skin, by mixing a vinyl chloride resin with a foaming agent and two kinds of polymers composed mainly of methyl methacrylate and having different polymerization degree. CONSTITUTION:(A) 70-99.5wt% vinyl chloride resin is compounded with (B) 0.5-30% to w-stage polymerization product consisting of (a) 70-95% copolymer component having an average polymerization degree of 10,000-35,000 and composed of 90-99% methyl methacrylate, 1-10% acrylic acid ester and 0-5% other monomer and (b) 30-5% polymer component having an average polymerization degree of 500-10,000, consisting of 80-100% methyl methacrylate and 20-10% other monomer, and prepared in the presence of the above copolymer component. The objective composition can be prepared by adding a foaming agent to the above mixture. |
