| 摘要 |
Provided are an olefin-based resin (β), which satisfies the following requirements (I) to (VI), and a propylene-based resin composition comprising the same. (I) (β) comprises a grafted olefin-based polymer [R1] which has a main chain comprising an ethylene/α-olefin copolymer and a side chain comprising a propylene polymer. (II) The ratio (Pwt%) of the propylene polymer contained in (β) is 5 to 60wt%. (III) When the ratio of a component, which shows a peak temperature lower than 65oC in a differential elution curve measured by cross fractionation chromatography (CFC) using ortho-dichlorobenzene as a solvent, to (β) is referred to as (Ewt%), the value (a) represented by formula (Eq-1) is 1.4 or greater: a=(100-E)/P (Eq-1) [wherein E and P are as defined above]. (IV) When measured by differential scanning calorimetry (DSC), the melting temperature (Tm) is 120 to 165oC and the glass transition temperature (Tg) is -80 to -30oC. (V) The content of matters insoluble in hot xylene is less than 3wt%. (VI) The limiting viscosity [η] measured in decalin at 135oC is 0.5 to 5.0 dl/g. |
