申请人:Chang Andy C.
公开号:US20110118418A1
公开(公告)日:2011-05-19
The present invention includes a polyolefin elastomeric composition comprising a propylene-based elastomer having at least seventy five weight percent units derived from propylene, the propylene-based elastomer exhibiting a heat of fusion of from 1 to 35 Joules/gram, a weight average molecular weight of from 5400 to 875000 g/mol, and a permanent set of less than 40%; and a homogeneous ethylene-alpha olefin interpolymer having a molecular weight distribution of less than 3.5, a density from 0.885 to 0.915 g/ml, and a heat of fusion of from 65 to 125 Joules/gram, wherein the ratio of the propylene-based elastomer to the homogeneous ethylene-alpha olefin interpolymer is from 97:3 to 80:20, and wherein the composition exhibits a heat of fusion from 2 to 55 Joules/gram, and a 2% secant flexural modulus of less than 69 MPa.
本发明包括一种聚烯烃弹性组合物,包括至少75重量%来自丙烯的基础丙烯酸酯弹性体,该基础丙烯酸酯弹性体的熔融热为1至35焦耳/克,重均分子量为5400至875000克/摩尔,永久变形率小于40%;以及一种均相的乙烯-α烯烃互聚物,其分子量分布小于3.5,密度为0.885至0.915克/毫升,熔融热为65至125焦耳/克,其中基础丙烯酸酯弹性体与均相的乙烯-α烯烃互聚物的比例为97:3至80:20,组合物的熔融热为2至55焦耳/克,2%切线弯曲模量小于69兆帕。