Thermoplastic elastomer composition, powder, pellets, and moldings

摘要

A thermoplastic elastomer composition containing (A), (B-1) and (B-2) described below and having a total content of (B-1) and (B-2) of 10 to 250 parts by weight per 100 parts by weight of the content of (A), a complex dynamic viscosity eta*(1) at 250 ° C. of 1.5x105 poise or less and a Newtonian viscosity index n of 0.67 or less, and pellets obtained by using the thermoplastic elastomer composition, and a molded article thereof:(A): a polyolefin-based resin;(B-1): a conjugated diene-based thermoplastic elastomer or its hydrogenated product providing two tan delta peaks within a temperature range of -70 to 30° C. in a temperature dependence curve of tan delta determined by a solid viscoelasticity measurement of the composition obtained by being kneaded with (A); and(B-2): a conjugated diene-based thermoplastic elastomer or its hydrogenated product providing a new single tan delta peak at a temperature which is different from both the tan delta peak temperature of (A) and the tan delta peak temperature of (B-2) within a temperature range of -70 to 30° C. in a temperature dependence curve of tan delta determined by a solid viscoelasticity measurement of the composition obtained by being kneaded with (A).