| 摘要 |
A medium containing≥30 wt. % water is used in the polymerisation of monomers containing double and/or triple bonds in the presence of a catalyst having as active components: (a) a cyclopentadienyl transition metal compound (I); (b) optionally a cation-forming compound; and (c) optionally a further component. A medium containing≥30 wt. % water is used in the polymerisation of monomers containing double and/or triple bonds in the presence of a catalyst having as active components: (a) a cyclopentadienyl transition metal compound of formula (I); (b) optionally a cation-forming compound; and (c) optionally a further component. M = Ti, Zr, Hf, V, Nb, Ta, a sub-Group III element or a lanthanide; X = F, Cl, Br, I, H, 1-10C alkyl, 6-15C aryl, 1-10C alkyl-6-20C aryl, -OR<6>, -NR<6>R<7> or -N(CH2CH2O)3; n = 1, 2 or 3 and is the valency of M minus 2; R<6> and R<7> = H, 1-10C alkyl, 6-15C aryl, alkaryl, or aralkyl, fluoro-1-10C alkyl or fluoro-6-20C aryl; R<1> - R<5> = H, 1-10C alkyl, 5-7-membered cycloalkyl optionally substituted by 1-10C alkyl, 6-15C aryl or aralkyl or -Si(R<8>)3 and optionally with 2 adjacent groups forming together a 4-15C optionally unsaturated cyclic group; and Z = X or a group of formula (II); or R<4> and Z together form a group = -R<15>-A-; R<8> = 1-10C alkyl, 3-10C cycloalkyl or 6-15C aryl; R<9> - R<13> = as for R<1> - R<5>; or R<4> and R<12> can together form an = R<15> group; R<15> = -M<2)<R<16>)(R<17>)-, -(M<2)<R<16>)(R<17>))2-, -M<2)<R<16>)(R<17>)-C(R<18>)2-, -C(R<16>)(R<17>)-, -O-M<2)<R<16>)(R<17>)-, -(C(R<16>)(R<17>))2-, =BR<16>, =AlR<16>, -Ge-, -O-, -S-, =SO, =SO2, =N(R<16>), =CO, =PR<16> or =P(O)R<16>; R<16> - R<18> = H, halogen, 1-10C alkyl, fluoroalkyl or alkoxy, 6-10C aryl or fluoroaryl, 2-10C alkenyl, 7-40C alkaryl or aralkyl or 8-40C aralkenyl or 2 adjacent groups form a ring with the bonded atoms; M<2> = Si, Ge or Sn; A = -O-, -S-, =NR<19> or =PR<19>; R<19> = 1-10C alkyl, 6-15C aryl, 3-10C cycloalkylalkaryl or -Si(R<20>); and R<20> = H, 1-10C alkyl, 6-15C aryl (optionally substituted by 1-4C alkyl) or 3-10C cycloalkyl.
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