Polypropylene resin composition for transparent sheet having high impact resistance and scratch resistance

摘要

PURPOSE: Provided is a polypropylene resin composition suitable to form a sheet having excellent scratch resistance, as well as transparency and impact resistance at low temperature. CONSTITUTION: The composition comprises 100 parts by weight of propylene 1-butene random copolymer comprising 1-10 mol% of 1-butene and has a melt index(230 deg.C, 2.16 kg load, ASTM D1238 standard) of 1-10 g/10 min, 0.05-0.5 parts by weight of sorbitol-based nucleating agent, and 1-5 parts by weight of ethylene-alpha-olefin copolymer. The nucleating agent is 3,4-dimethylbenzylidene sorbitol. The ethylene-alpha-olefin copolymer has a density of 0.88-0.90, and a melt index(190 deg.C) of 1-10 g/10 min.