Patent ID: 7605217
Filing Date: 2009-10-20
Classification: A43B,C08F,D01D,D01F,Y10T

Abstract:
1. A crosslinked elastomer comprising: (a) propylene-derived units in an amount of at least 75 wt %, based on the combined weight of components (a), (b), and (c); (b) ethylene-derived units in an amount of at least 5 wt %, based on the combined weight of components (a), (b), and (c); and (c) diene-derived units in an amount of from 0.3 to 10 wt %, based on the combined weight of components (a), (b), and (c); where the diene is selected from the group consisting of 5-ethylidene-2-norbornene, 5-vinyl-2-norbornene, divinyl benzene, and dicyclopentadiene; and wherein the elastomer has an isotactic propylene triad tacticity of from 65 to 95%, a melting point by DSC equal to or less than 110° C., a heat of fusion of from 5 J/g to 50 J/g, an ultimate tensile strength of 1 MPa or greater, a Die C tear strength of 50 lb/in or greater, and a ratio of Shore A hardness to MFR@230° C. prior to crosslinking of 160 or less.