| 摘要 |
PURPOSE: A polypropylene resin composition is provided, which is improved in transparency and, heat resistance and injection molding ability in a thin product by using a highly isotactic polypropylene resin with a wide distribution of molecular weight. CONSTITUTION: The polypropylene resin composition comprises 100 parts by weight of a highly isotactic polypropylene resin which has a melting index of 30-70 g/10 min, an isotactic index by NMR (pentad method) of 95% or more and a distribution of molecular weight of 5-12; and 0.05-1.5 parts by weight of a nucleating agent. Preferably the nucleating agent is selected from the group consisting of methylbenzylidene sorbitol, 3,4-dimethylbenzylidene sorbitol, sodium benzoate, aluminum para-butyl benzoate, sodium 2,2'-methylenebis(4,6-di-tert-butylphenyl)phosphate and their mixtures. |
