Random propylene-ethylene copolymers

摘要

Novel bridged cyclopentadienyl compounds and corresponding metallocene catalysts are claimed. - Bridged cyclopentadienyl compounds (I) are of formula (1). - R3, R4, R6, R50 = H, 1-20C hydrocarbon, preferably 1-18C alkyl, 2-20C alkenyl, 3-15C alkylalkenyl, 6-18C aryl, 5-18C heteroaryl, 7-20C arylalkyl, 7-20C alkylaryl, optionally fluorinated; - R5 = isobutyl, isopropyl, isopentyl, isohexyl, cyclopentyl or cyclohexyl; R20, R21=6-18C aryl, optionally substituted, 5-18C heteroaryl, 7-20C arylalkyl, fluorinated 6-18C aryl or 7-20C arylalkyl and two R20 or R21 groups may form a mono- or polycyclic ring system, optionally substituted whereby R20 and R21 are not simultaneously naphthyl, phenyl, phenanthrenyl or anthracenyl as well as mixtures of naphthyl and phenyl; - Q = 4-24C aryl, a heteroaryl that with the cyclopentadienyl ring forms azapentalene, thiopentalene or phosphapentalene, optionally substituted by R20; Z=0-3; - l = 0-4, preferably 1; - B = a bridging structural element; - M = Ti, Zr or Hf, preferably Zr; - x = halogen, preferably chlorine, alkyl, preferably methyl or phenolate, optionally substituted. - Independent claims are included for: - (i) metallocene compounds (II) of formula (2), excluding rac-Me2Si(2-i-Pr-4-(1-naphthyl)ind)(2'-Me-4'-phInd)ZrCl2, rac-Me2Si(2-i-Pr-4-(1-naphthyl)ind)(2'-Me-4',5'-benzind))ZrCl2, rac-Me2Si(2-i-Pr-4-(1-naphthyl)ind)(2'-Me-4',5'-benzind))ZrCl2, rac-Me2Si(2-i-Pr-4-(1-naphthyl)ind)(2'-Me-4'',5'-benzind))ZrCl2, rac-Me2Si(2-i-Pr-4-phenylind)(2'-ethyl-4'-phind))Zrcl2, rac-Me2Si(2-i-Pr-4-(1-naphthyl)ind)(2'-ethyl-4'-PhInd))Zrcl2, rac-MeSi(2-i-Pr-4-Phind)(2'-Me-4'-PhInd))ZrCl2 and rac-MeSi(2-i-Pr-4-(1-naphthyl)ind)(2'-ethyl-4',5'-benzind))ZrCl2; - (ii) a catalyst system (III) comprising a metallocene compound (II), at least one cocatalyst and/or at least one support; - (iii) a process for the production of a polyolefin by polymerization of an olefin in the presence of the metallocene compounds (II); - (iv) propylene homo- or copolymers prepared using the metallocene compound (II).