Patent ID: 6451894
Filing Date: 2002-09-17
Classification: C08L,Y10T

Abstract:
A molded article comprising a thermoplastic polyolefin blend of:a polyolefin component of a substantially crystalline polymer in an amount of about 30 to 98 percent by weight of the blend; and an elastomer of a sequentially polymerized ethylene-&agr;-olefin copolymer having a multimodal distribution comprising first and second modes of at least one of: (A) molecular weight, with the first and second modes differing by at least about 25,000 in weight average molecular weight, with the molecular weight of the higher molecular weight mode being no greater than about 350,000; (B) density, with the first and second modes differing by at least about 0.005 g/cc; or (C) &agr;-olefin monomers, with the first and second modes including comonomers which differ in length by at least one carbon atom; wherein the multimodal distribution has between 2 and 10 modes, the elastomer has an overall density of 0.9 or less and an overall Mw/Mn ratio which is at least 3 and greater than (I10/I2â€”4.63), and the elastomer is present in an amount of about 2 to 70 percent by weight of the blend.