Patent ID: 6635733
Filing Date: 2003-10-21
Classification: C08F,Y10S

Abstract:
An elastomeric polypropylene wherein (a) an isotactic pentad (I5) is 0.150-0.749, (b) a different bond due to a 2,1-insertion reaction is 0.11-20 mol%, (c) a different bond due to a 1,3-insertion reaction is 0-10 mol% and (d) a melting point (Tm) is 50-160Â° C., (a) to (c) being determined from 13C NMR spectra, obtained by the polymerization of propylene or a mixture of propylene and another olefin at a temperature of 20 to 80Â° C. in bulk polymerization, using any one of a metallocene catalyst (I) comprising a metallocene compound (A), an activating compound (B) and if desired, an organoaluminum compound (C); a supported metallocene catalyst (II) prepared by supporting the metallocene catalyst (I) on a finely particulate support (D); and a supported metallocene catalyst (III) prepared by adding an organoaluminum compound (E) to the supported metallocene catalyst (II).