CATALYST(S) FOR COPOLYMERIZATION OF OLEFINS, METHOD OF PREPARING OLEFIN HOMO OR COPOLYMERS Russian patent published in 1999 - IPC

FIELD: chemistry of polymers. SUBSTANCE: catalyst is prepared by reacting metallocene compound, organoaluminium compound and water. Metallocene compound is cyclopentadienyl compound by general formula (I): (C₅R1x-m

H_5-x)R2m(C₅R_y-mH_5-y)_nMQ_3-n wherein M is Ti or Zr or Hf, C₅R1x-mH_5-x и C₅R_y-mH_5-y are identically or differently substituted cyclopentadienyl rings; R¹ are the same or different alkyl, aryl or alkylaryl groups containing from 1 to 20 carbon atoms, or two or four R¹ substituents of the same cyclopentadienyl group form one or two rings having from 4 to 6 carbon atoms; R² is bridge group which connects two cyclopentadienyl rings and is CR32, C₂R34, SiR32 wherein R³, the same or different from each other, are lower alkyl or hydrogen; Q are halogen atoms or have R¹ meanings as defined above; m=n=0 or 1; n is 1 when m is 1; X is integer of (m+1) to 5, preferably (m+2) to 5; Y has integer of m to 5, and organoaluminium compound is compound of formula (II): AlR43-zH_z (II) wherein R⁴, the same or different from each other, are alkyl or alkylaryl radicals containing from 1 to 10 carbon atoms, at least one of R⁴ substituents is other than linear alkyl group; Z is O to 1, organoaluminium compound to water molar ratio is (1-100): 1, respectively, provided that at least part of aluminium is used in the form other than alumooxane compound of formula (III): wherein R⁴ substituents, the same or different from each other, are as defined above. Method uses above-mentioned catalyst. New catalyst has activity higher than activity of well known catalysts. EFFECT: higher activity of catalysts. 19 cl, 42 ex, 9 tbl