Patent ID: 6610408
Filing Date: 2003-08-26
Classification: C08L,Y10T

Abstract:
A thermoplastic polyolefin blend comprising:a polyolefin component of a substantially crystalline virgin 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; (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 elastomer is present in an amount of about 2 to 70 percent by weight of the blend; wherein the multimodal distribution has between 2 and 10 modes.