| 摘要 |
PURPOSE:To obtain a polypropylene resin compsn. excellent in various properties such as impact resistance, rigidity and hardness, esp. in the balance between impact resistance at low temp. and hardness as well as fluidity. CONSTITUTION:A polypropylene compsn. comprises 80-60wt.%, based on components (A) and (B), polypropylene resin (A) comprising a propylene copolymer X having a content of alpha-olefin monomer units other than propylene monomer units of at most 4mol%, an mmmm fraction of at least 96% in terms of pentad fraction measured by <13>C NMR and an intrinsic viscosity [eta] of 0.7dl/g to 1.5dl/g and a propylene copolymer Y having an intrinsic viscosity [eta]of at least 3.5dl/g, 20-40wt.%, based on components (A) and (B), rubber component (B) prepd. from 30-70wt.% ethylene-propylene copolymer rubber having a propylene monomer unit content of 35 to 60wt.% and a Mooney viscosity ML1+4 (100 deg.C) of 10 to 80 and 70-30wt.% ethylene-butene-1 copolymer having a butene monomer unit content of 12 to 25wt.% and a melt index of 0.5 to 10g/10min, and 8-15 pts.wt., based on 100 pts.wt. total of components (A) and (B), inorg. filler. |
