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AssigneesChisso Corporation, Chisso Petrochemical Corporation
InventorsTsuyoshi Yahata, Masato Nakano, Yoshiyuki Ohgi, Tsutomu Ushioda
Estimating the term…
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 50-160° C., (a) to (c) being determined from 13C NMR spectra, which is obtainable by the polymerization of propylene 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). In particular, it has excellent transparency and elastic characteristics.
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 50-160° 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 80° 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);
Dependencies are inferred from the claim text.