Supported metallocene catalyst system

摘要

Supported metallocene catalysts are claimed which are obtd. by (a) depositing a mixt. of (A) a metallocene complex(es) of formula (I) and (B) a metal cpd(s). of formula (II) on a support which is opt. pretreated with a metal cpd(s). of formula (III); and (b) activating the system by reacting with a soln. or suspension of a cpd. which forms metallocenium ions. M<1))m(X<1>)o (II) M<2))p(X<2>)q (III) M = Ti, Zr, Hf, V, Nb or Ta; X = F, Cl, Br, I, H, 1-10C alkyl, 6-15C aryl or OR<5>; R<5> = 1-10C alkyl, 6-15C aryl or alkaryl, aralkyl, fluoroalkyl or fluoroaryl with 1-10C alkyl and 6-20C aryl gps.; R<1>-R<4> = H, 1-10C alkyl, 5-7C cycloalkyl (opt. substd. with 1-10C alkyl), or 6-15C aryl or aralkyl, opt. with 2 adjacent gps. forming a 4-15C ring or Si(R<6>)3; R<6> = 1-10C alkyl, 6-15C aryl or 3-10C cycloalkyl; Y = Si, Ge, Sn or C; R<7> = H, 1-10C alkyl, 3-10C cycloalkyl or 6-15C aryl; n = 1, 2, 3 or 43; E = -O-, -S-, -NR<8>- or -PR<8>-; R<8> = 1-10C alkyl, 3-10C cycloalkyl, 6-15C aryl, alkaryl or Si(R<9>)3; R<9> = 1-10C alkyl, 8-10C cycloalkyl, 6-15C aryl or alkaryl; M<1> = alkali, alkaline earth or Gp.III metal; R<10> = as for R<5> (except for F-substd. gps.); X<1> = F, Cl, Br or I; m = 1-3; o = 0-2; m+o = valency of M<1>; M<2> = as for M<1>, R<11> = as for R<10>; X<2> = F, Cl, Br or I; p = 1-3; q = 0-2; and p+q = valency of M<2>. Also claimed are (i) the process as above, and (ii) the prodn. of polyolefins at -60 to +200 degrees C and 0.5-3500 bar in the presence of the above catalyst system, which is activated before, during or after its addn. to the reactor.