| 摘要 |
PURPOSE:To obtain the subject composition, containing a specific propylene- based block copolymer, a specified styrenic block copolymer, a specific filler and a specified ethylenic rubber, and having high-level balance of mechanical strength, good appearance of moldings and moldability. CONSTITUTION:The objective composition contains (A) a propylene-ethylene block copolymer having (i) a crystalline polypropylene part having 5-300g/10min MFR and >=0.907g/cm<3> density and (ii) an ethylene-propylene random copolymer part having 20-80wt.% ethylene content, 3-200g/10min MFR and 5-15 ratio of weight-average molecular weight/number-average molecular weight, (B) a styrene-ethylene-butylene-styrene block copolymer having 10-25wt.% content of combined styrene, 10000-50000 number-average molecular weight and 50-250g/10min MFR and (C) a filler, etc., such as talc treated with a compound such as formula I or II [R<1> is monovalent (OH-containing)hydrocarbon having 250-500 molecular weight; M is Li, Ca, etc.; R<4> is H, 1-8C hydrocarbon, etc.]. |
