POLYOLEFIN COMPOSITION

PURPOSE:To provide a polyolefin composition having excellent impact strength, especially low-temperature impact strength, flow-moldability and appearance and usable for daily goods, automobile parts, etc. CONSTITUTION:The objective composition is produced by compounding (A) 95-50 pts.wt. of a polyolefin resin with (B) 5-50 pts.wt. of a hydrogenated block copolymer composed of (B1) a hydrogenated block copolymer consisting of two or more polymer blocks composed mainly of vinyl aromatic compound and one or more polymer blocks composed mainly of conjugated diene compound, wherein >=80% of the conjugated diene unit is hydrogenated and the vinyl bond content is 40-60% before hydrogenation and (B2) a hydrogenated block copolymer having a molecular weight lower than that of the component B1 and composed of one or more polymer blocks composed mainly of vinyl aromatic compound and one or more polymer blocks composed mainly of conjugated diene compound, wherein >=80% of the conjugated diene unit is hydrogenated and the vinyl bond content is 40-60% before hydrogenation. The weight ratio of B1/B2 is 40/60 to 90/10, the arithmetic mean of the number-average molecular weights of both copolymers is 40,000-200,000 and the molecular weight ratio of B1/B2 is 1.1-4.5.