Jean-Roch Schauder;Thomas T. Sun;Galen C. Richeson;Rainer Kolb
发明人:
Galen C. Richeson,Rainer Kolb,Jean-Roch Schauder,Thomas T. Sun
申请号：
US13310146
公开号：
US20130143461A1
申请日:
2011.12.02
申请国别(地区):
US
年份:
2013
代理人:
摘要：
Propylene-based polymer compositions are provided comprising propylene and from about 5 wt % to about 20 wt % of one or more C2 and/or C4-C12 α-olefins. The polymer compositions have a triad tacticity greater than about 90%, a heat of fusion less than about 75 J/g, and a melt flow rate (MFR) greater than or equal to about 25 g/10 min (230° C., 2.16 kg). Further, the polymer compositions are reactor grade compositions comprising a reactor blend of a first polymer and a second polymer, preferably where both of the first and second polymers are prepared using the same catalyst system. Meltspun nonwoven fabrics, such as meltblown or spunbond fabrics, comprising such polymer compositions are also provided, as well as processes for forming the nonwoven fabrics.
