POLYPROPYLENE RESIN COMPOSITION

摘要

PURPOSE:To provide the subject composition containing a disperse phase consisting of a rubber reinforced styrene resin containing rubber particles having a specific particle diameter and a salami structure, having physical properties remarkably balanced by the control of the morphology and having excellent surface hardness and low-temperature surface impact resistance. CONSTITUTION:The present composition is composed of a polypropylene resin, a rubber-reinforced styrene resin and a compatibilizing agent. The rubber- reinforced styrene resin 2 (containing rubber particles 3 having a salami struc ture and an areal average particle diameter of 0.5-1.5mum and dispersed in said resin) having an areal average particle diameter of <=5mum is dispersed as dis perse phase particles in a continuous phase of the polypropylene resin. The surface of the disperse phase particle composed of the rubber-reinforced styrene resin is covered with a layer of the compatibilizing agent 4 having a thickness of 0.05-0.5mum. The compounding amount of the compatibilizing agent is 5-20 pts.wt. based on 100 pts.wt, of the resin composition consisting of 70-95wt.% of the polypropylene resin and 30-5wt.% of the rubber-reinforced styrene resin.