Patent ID: 7056992
Filing Date: 2006-06-06
Classification: C08F,C08L

Abstract:
1. A polymer comprising from about 5 to about 25 wt % of one or more α-olefins, and from 75 to about 95 wt % propylene, wherein the polymer is made using a polymerization catalyst comprising a hafnium-containing composition, wherein the one or more α-olefins comprise butene or pentene, wherein the polymer optionally further comprises ethylene as an α-olefin and wherein the polymer has: a melting point ≦105° C.; a heat of fusion <75 J/g; a crystallinity of from about 2 to about 65% of homoisotactic polypropylene; and a MWD from about 2.0 to about 3.2.