| 摘要 |
PROBLEM TO BE SOLVED: To provide a propylene-base polymer composition capable of yielding injection-moldings which are excellent in stiffness and impact resistance, particularly in injection-moldability, have few noticeable flow marks and stones, and are excellent in appearance, and its use. SOLUTION: The propylene-base polymer composition suitable for injection- moldings comprises (A) 30-95wt.% propylene block copolymer which (1) contains 2-36wt.% of a 64 deg.C decane-soluble component, (2) the 64 deg.C decane-soluble component containing 20-55mol% of units derived from ethylene, (3) the ratio ofη*(0.01) measured at an angular velocityωof 0.01 rad/s toη*(100) measured at an angular velocityωof 100 rad/s being 50 or more in a frequency viscoelasticity measurement of the 64 deg.C decane-soluble component at 200 deg.C, (B) 5-70wt.% ethylene-α-olefin random copolymer and/or styrene-base block copolymer, and (C) 0-25wt.% inorganic filler. |
