Patent ID: 6399200
Filing Date: 2002-06-04
Classification: C08L,Y10T

Abstract:
(Amended) A thermoplastic elastomer composition comprising (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 &eegr;*(1) at 250Â° C. of 1.5Ã—105 poise or less and a Newtonian viscosity index n of 0.67 or less;(A): a polyolefin-based resin, (B-1): a hydrogenated product of a conjugated diene-based thermoplastic elastomer providing two tan &dgr; peaks within a temperature range of âˆ’70 to 30Â° C. in a temperature dependence curve of tan &dgr; determined by a solid viscoelasticity measurement of a composition obtained by being kneaded with (A), and having a proportion of the number of hydrogenated conjugated diene units having a side chain with at least two or more of carbon atoms to the total number of hydrogenated conjugated diene units of less than 50%, and (B-2): a hydrogenated product of a conjugated diene-based thermoplastic elastomer providing a new single tan &dgr; peak at a temperature which is different from both the tan &dgr; peak temperature of (A) and the tan &dgr; peak temperature of (B-2) within a temperature range of âˆ’70 to 30Â° C. in a temperature dependence curve of tan &dgr; determined by a solid viscoelasticity measurement of a composition obtained by being kneaded with (A), having a proportion of the number of hydrogenated conjugated diene units having a side chain with at least two or more of carbon atoms to the total number of hydrogenated conjugated diene units of 60 to 95%, wherein the weight ratio of (B-1) to (B2) is 5:95 to 95:5.