| 摘要 |
PURPOSE:The titled composition which gives a molded article having excellent balance between stiffness and impact strength, excellent heat resistance, and good appearance, made by incorporating mica having a specified average particle diameter and particle size distribution into a crystalline propylene-ethylene copolymer resin optionally with a rubber-like material incorporated therein. CONSTITUTION:A polypropylene resin composition comprising 50-97wt% crystalline propylene-ethylene copolymer resin (A), 0-20wt% rubber-like material (B), and 3-50wt% mica (C) having an average particle diameter (determined by photo extinction method of the liquid phase sedimentation analysis) of 0.5- 4.5mum, with the particle size distribution being at least 95wt% fraction of 10mum or smaller, at least 60wt% fraction of 5mum or smaller, and 10-80wt% fraction of 1mum or smaller. The composition can produce a molded article having excellent balance between stiffness and impact strength, excellent heat resistance, and excellent appearance, by injection, extrusion, rotational molding, etc., and can be used as a material for automobile parts, parts of electrical appliances, business machine parts, etc. |
