Patent Number: 6,429,274

Title: Elastic polypropylenes and catalysts for their manufacture

Abstract: A propylene polymeric composition with elastic character that is soluble inat least one nonpolar organic solvent selected from the group consistingof toluene, xylene, heptane, and hexane, comprises greater than 3 weightpercent and up to 45 weight percent homotactic sequences each having onlyr or m diads, all of which homotactic sequences have a helical length inthe range of 20 to 150.ANG., and in the range of 55 to 97 weight percentof the sum of homotactic sequences of less than 20.ANG. in helical length,each homotactic sequence having only r or m diads and having fewer than 10repeat units with mmmm pentads being present in the range of 0 to 35weight percent of the total composition, and heterotactic sequences havingr and m diads of unequal number, the polymer having a molecular weight(M.sub.w) of at least 70,000.

Inventors: Siedle; Allen R. (Lake Elmo, MN), Misemer; David K. (Maplewood, MN), Kolpe; Vasant V. (Mendota Heights, MN), Duerr; Brook F. (Lake Elmo, MN)


International Classification: C08F 10/06 (20060101); C08F 10/00 (20060101); C07F 7/00 (20060101); C07F 7/08 (20060101); C08L 23/00 (20060101); C08L 23/10 (20060101); C08F 110/06 (20060101); C08F 4/00 (20060101); C08F 210/00 (20060101); C08F 210/06 (20060101); C08F 110/00 (20060101); C08F 4/659 (20060101); C08F 110/06 ()

Expiration Date: 08/06/2014