| 摘要 |
PURPOSE:To obtain the title compsn. which can prevent the occurrence of streaky discoloration when it is injection-molded by compounding a propylene-alpha- olefin block copolymer resin with a small amt. of a modified polyolefin. CONSTITUTION:The tile compsn. which can prevent the occurrence of discoloration called white streaks formed on the outer surface on the extended line of a gate when it is injection-molded is obtd. by incorporating 0.1-5 pts.wt. modified polyolefin (B) [e.g., those having an acid value of 4mg-KOH/g or higher and an intrinsic viscosity eta (measured in decalin at 135 deg.C) of 0.04-24dl/g, such as maleic anhydride-grafted polypropylene, are pref.] in a propylene-alpha-olefin block copolymer resin (A), e.g., propylene-ethylene copolymer resin. |
