| 摘要 |
PURPOSE:To obtain an inexpensive composition of outstanding coatability with high rigidity, high molding fluidity and high gloss, by incorporating a crystalline ethylene-propylene block copolymer with an ethylene-propylene copolymer rubber, talc and barium sulfate. CONSTITUTION:The objective composition can be obtained by incorporating (A) 40-85wt% of a crystalline ethylene-propylene block copolymer with an ethylene content 5-20wt% and MFI at 230 deg.C >=5, with (B) 10-30wt% of an ethylene-propylene copolymer rubber with a propylene content 65-90wt% and Mooney viscosity at 100 deg.C 15-80, (C) 2.5-27.5wt% of talc with an average particle size <=3mu having such a particle size distribution as to be >=90wt%, >=65wt% and >=20wt% for <=10mu, <=5mu and <=1mu, respectively, and (D) 2.5-27.5wt% of barium sulfate with an average particle size <=1.0mu so as to be 100wt% for the components A+B+C+D and 5-30wt% for the components C+D. |
