Patent ID: 6197910
Filing Date: 2001-03-06
Classification: C08F,C08L,Y10S

Abstract:
A polyolefin composition consisting essentially of isotactic polypropylene and, optionally, up to 20 mole percent comonomer repeating units formed from one or more comonomers selected from the group consisting of ethylene, butene-1, pentene-1, 4-methylpentene-1, hexene-1, octene-1, decene-1, geminally disubstituted olefins, C.sub.7 -C.sub.25 cyclic olefins, styrenic olefins, lower carbon number (C.sub.3 -C.sub.8) alkyl substituted analogs of the cyclic and styrenic olefins, polar vinyl compounds, 1,4-hexadiene, norbornadiene, and acetylene, said polyolefin composition having stereospecific crystalline polypropylene sidechains comprising isotactic or syndiotactic polypropylene wherein the polyolefin composition has a lower molecular weight region with a weight average branching index g' of less than 0.93.