| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition improved in impact resistance and excellent in extrusion moldability by adding calcium carbonate having a small particle diameter and heavy calcium carbonate or light calcium carbonate having a large particle diameter to a vinyl chloride resin. SOLUTION: This vinyl chloride resin composition comprises (A) 100 pts.wt. of a vinyl chloride resin, (B) 1-25 pts.wt. of a calcium carbonate mixture comprising (i) calcium carbonate having an average particle diameter of <=0.1μm and (ii) heavy calcium carbonate having an average particle diameter of 1-3μm or light calcium carbonate having an average particle diameter of 1-3μm in a weight ratio of 3:7 to 7:3, and, if necessary, (C) an impact-improving agent, a heat stabilizer, a processability-improving agent, a lubricant, etc. The various kinds of calcium carbonate used as the component B are preferably subjected to surface treatments using a fatty acid (alkyl ester) (e.g. an alkyl oleate ester), etc. |
