| 摘要 |
PURPOSE:To obtain a polypropylene resin compsn. excellent in tensile elongation at break, flexural modulus of elasticity, impact strength and fluidity. CONSTITUTION:The title compsn. comprises 100 pts.wt. (A) polypropylene having a melt index of 30 to 120g/10min, (B) an ethylene-butene-1 copolymer elastomer having an ethylene monomer unit content of 80 to 90wt.%, (C) an ethylene- propylene copolymer elastomer having an ethylene monomer unit content of 75 to 85wt.%, (D) an ethylene-propylene copolymer elastomer and/or ethylene- propylene-diene copolymer elastomer having an ethylene monomer unit content of 25 to 60wt.%, and 0-30 pts.wt. (E) an inorg. filler, provided that the blending proportions of the elastomers (B), (C) and (D) satisfy the following relations: 30 pts.wt.<=(B)+(C)+(D)<=100 pts.wt., 0.3<=(B)/[(B)+(C)+(D)]<=0.7, and 0.1 pt. wt.<=(D)<=10 pts.wt. |
