abstract |
(57) [Summary] (Modified) [Objective] To provide a method for producing a propylene copolymer having an excellent balance of transparency and rigidity. [Structure] A method for producing a propylene copolymer having an ethylene content of 0.01 to 10% by weight using a polymerization catalyst consisting of 1) to 3). 1) a solid catalyst component containing metal oxide, magnesium, titanium, halogen and an electron donating compound as essential components, 2) Organoaluminum compound and 3) formula [Wherein R 1 , R 4 and R 5 are the same or different hydrocarbon groups, R 2 is a hydrocarbon group or R 6 O, R 3 is a hydrocarbon group or R 7 O, and x is 2 or 3, R 6 and R 7 are the same or different hydrocarbon groups. ] The organosilicon compound represented by these. |