| 摘要 |
PURPOSE:To obtain the title inexpensive composition excellent in drawdown resistance, pinch-off characteristics, etc., by incorporating a specific propylene- ethylene copolymer or its blend with a high-density polyethylene with each specified amount of a rubbery elastomer and talc. CONSTITUTION:The objective composition can be obtained by incorporating (A) 40-93wt.% of a propylene-ethylene copolymer <=1g/10min in melt index, 1-15wt.% in ethylene unit content and >=92% in the isotactic pentad fraction of the propylene homopolymerized domain with (B) 2-15wt.% of a rubbery elastomer 3X10<4>-1X10<6> poise in the complex viscosity at a frequency of 0.01 Rad/sec and (C) 5-30wt.% of talc <=5mum in mean particle size and 3-20 in mean aspect ratio. Where appropriate, part of the component A, i.e., <=30wt.% of the total amount of the component. A may be replaced by a high density polyethylene <=0.1g/10min in melt index and 2-20 in the parameter A defined by the formula. |
