COLORED MASTER BATCH COMPOSITION AND COMPOUND FOR PROPYLENE-ALPHA-OLEFIN BLOCK COPOLYMER RESIN MOLDED PRODUCT

摘要

PROBLEM TO BE SOLVED: To obtain a colored master batch composition capable of giving a propylene-α-olefin block copolymer resin molded product with excellent impact resistance and rigidity so as to prevent developing striated color unevennesses in its injection molding while maintaining the balance of characteristics of the melt. SOLUTION: This colored master batch composition includes a master batch component which is composed of 15-94 pts.wt. of a polypropylene resin, 2-20 pts.wt. of finely powdered ultra-high-molecular weight polyethylene, 3-50 pts.wt. of a pigment and 1-15 pts.wt. of a pigment dispersant.