Patent ID: 6812292
Filing Date: 2004-11-02
Classification: C08F,C08L

Abstract:
A polypropylene-b-poly(ethylene-co-propylene), having a weight-average molecular weight (Mw) of 100,000 or more; a poly(ethylene-co-propylene) segment content of not less than 5 wt. % and less than 100 wt. %; and a total ethylene content of 2-95 wt. %, wherein the polypropylene-b-poly(ethylene-co-propylene) has the following characteristics (a) and (b):(a) polypropylene segments and poly(ethylene-co-propylene) segments are linked chemically; and (b) the polypropylene segments and poly(ethylene-co-propylene) segments are synthesized in the presence of an olefin polymerization catalyst comprising an organometallic compound and a solid catalyst component comprising either titanium and a halogen or titanium, magnesium, and a halogen.