Patent ID: 6541592
Filing Date: 2003-04-01
Classification: C08L,C09K

Abstract:
An ethylene-&agr;-olefin copolymer which comprises ethylene and an &agr;-olefin having 3 to 8 carbon atoms, wherein the copolymer has an &agr;-olefin content of from 20 to 33.7 wt %, has a Mooney viscosity: ML1+4100Â° C. of from 20 to 60, has a tensile stress M100 measured according to JIS-K-6251 of 2.5 Mpa or less, and satisfies the following conditions (c) to (g):(c) Q value (weight-average molecular chain length/number-average molecular chain length) according to GPC measurement is 4 or more, (d) a molecular weight distribution curve which is bimodal, (e) a ratio (H=X1/X2) of high molecular weight peak height X1 to low molecular weight peak height X2 in a molecular weight distribution curve of from 2.0 to 7.0, (f) an area of low molecular weight parts having chain lengths of 100 Ã¥ or less in a molecular weight distribution curve of 3% or less, and (g) a heat of fusion of a crystal at temperature of from 50 to 100Â° C. which is 5 mJ/mg or more when measured by a differential scanning calorimeter (DSC).