1
James J McAlpin, Glenn A Stahl: Fibers and oriented films of polypropylene higher .alpha.-olefin copolymers. Exxon Chemical Patents, Douglas W Miller, November 5, 1996: US05571619 (69 worldwide citation)

A propylene, .alpha.-olefin copolymer, where the .alpha.-olefin has 5 or more carbon atoms made with a metallocene catalyst system provides substantially higher cold flow resistance from when the propylene copolymer is made with an .alpha.-olefin having 4 or less carbon atoms. Other properties such ...


2
Galen C Richeson, Glenn A Stahl, James J McAlpin, Anthony N Speca: Nonwoven fabrics. Exxon Chemical Patents, Paige Schmidt, April 6, 1999: US05891814 (35 worldwide citation)

This invention relates to improved polypropylene nonwoven fabrics. The fabrics are made from isotactic polypropylene which has been produced with a catalyst systems comprising at least two metallocenes. These nonwoven fabrics, particularly when prepared using a spunbonding process, exhibit significa ...