abstract |
(57) [Summary] (Corrected)n[Purpose] A polypropylene with an excellent balance of impact resistance and rigidity. A method for obtaining a block copolymer is provided.n[Structure] Using a polymerization catalyst comprising the following 1) to 3), Polymerize propylene to produce high crystalline polypropylene Step (a) and a step of copolymerizing propylene and ethylene Method for producing block copolymer of propylene comprising (b) Law.n1) Metal oxide, Mg, Ti, halogen and electron donating property Solid catalyst component containing a compound as an essential component 2) Organometallization Compound and 3)n An organic silicon compound represented by (for example, Me 3 SiOSi (OMe) 3 , Me 3 SiOSi (OMe) 2 Me, E t 3 SiOSi (OMe) 3 ). |