| 摘要 |
PURPOSE:To provide a vinyl chloride resin composition excellent in weathering resistance, impact resistance, moldability, etc., by adding a Ca/Zn/Sn stabilizer to a vinyl chloride copolymer containing an unsaturation-free rubber component. CONSTITUTION:A Ca/Zn/Sn stabilizer (A) is added to a vinyl chloride copolymer (B) containing a substantially unsaturation-free rubber component (e.g. a copolymer of an acrylic rubber with vinyl chloride) to produce an impact-resistant vinyl chloride resin composition. An example of component A is a mixture of calcium stearate with zinc stearate and octyltin maleate, and the amount of component A added is suitably 1-10 pts.wt. per 100 pts.wt. component B. The obtained composition can be easily extrusion-molded even when it is in powdery form and is useful as the material of profile extrusion moldings for outdoor use, such as building and civil engineering materials. |
