Patent ID: 7691958
Filing Date: 2010-04-06
Classification: C08F,C08J,C08L

Abstract:
1. A polypropylene for an electric material satisfying the following requirements (1) to (5) at the same time: (1) the melt flow rate is 0.1 to 30 g/10 mm; (2) the mesopentad fraction calculated from a (3) the firing residue is 50 ppm by weight or less based on the polypropylene, the titanium content and the iron content which are detected from the firing residue are 1 ppm by weight or less and 0.05 ppm by weight or less, respectively, based on the polypropylene, and the chlorine content is 5 ppm by weight or less based on the polypropylene; (4) the integrated amount of eluate measured up to 110° C. is 30% by weight or less, and an integrated amount of eluate measured up to 100° C. is 7.0% by weight or less, in a cross fraction chromatography (CFC method); and (5) the Mz/Mn and an Mw/Mn determined by GPC of 15 or more and 5 or more, respectively.