| abstract |
A prepolymerization catalyst component for polymerization of an olefin comprising a solid catalyst component comprising Mg, Ti and chlorine atoms and an electron donor (ID), said prepolymerization catalyst component comprising: - the electron donor (ID) comprises at least about 80 mol% 1,3-diether relative to the total molar amount of electron donor compound; - the prepolymerization catalyst has a porosity of less than 0.2 cm 3 / g due to pores having a diameter of not more than 1 탆; - a prepolymerization catalyst component, characterized in that it contains an ethylene prepolymer in an amount of less than 45% based on the total weight of the prepolymerization catalyst. |