A polyolefin composition is provided which consists essentially of isotactic polypropylene and, optionally, one or more comonomers, wherein the total comonomer content of the polyolefin composition is from 0 to 20 mole percent, and further, wherein the weight average branching index g for the lower molecular...http://www.google.fr/patents/US6342574?utm_source=gb-gplus-shareBrevet US6342574 - Propylene polymers incorporating macromers
