Patent ID: 6218470
Filing Date: 2001-04-17
Classification: C08L,C09D,C09J

Abstract:
An extrudable and moldable elastomeric blend composition comprising:A) from 90 to 55 weight percent of a triblock copolymer having two segments of a styrenic polymer and one midblock segment of a saturated olefin polymer; andB) from 10 to 45 weight percent of a substantially linear ethylene/.alpha.-olefin interpolymer, wherein the substantially linear ethylene/.alpha.-olefin interpolymer is characterized as comprising 1-octene and having:a) a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63,b) a molecular weight distribution, M.sub.w /M.sub.n, .ltoreq.(I.sub.10 /I.sub.2)-4.63,c) a density from 0.85 to 0.90 g/cm.sup.3, andd) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear ethylene/.alpha.-olefin interpolymer having about the same I.sub.2 and M.sub.w /M.sub.n.