CATALYSIS AND METHODS OF POLYMERIZATION OF OLEFINS Russian patent published in 2000 - IPC

FIELD: catalysts for polymerization of olefins and methods of polymerization of olefins. SUBSTANCE: disclosed are catalysts for polymerization of olefins which comprise reaction product between (A) bridge and/or substituted cyclopentadienyl titanium, zirconium or hafnium compound; (B) organometallic aluminium compound of formula II: Al(CH₂-CR⁴R⁵R⁶)_wR7y

H_z wherein (CH₂-CR⁴R⁵R⁶)_wR7yH_z are the same or different, R⁴ is alkyl, alkenyl, arylalkyl or aryl containing 1-10 carbon atoms; R⁵ is alkyl, alkenyl, aryl, arylalkyl or alkylaryl containing 3-50 carbon atoms and said group is different from unbranched alkyl or alkenyl group, and optionally R⁴ and R⁵ taken together, form cycle containing 4-6 carbon atoms; R⁶ is hydrogen or alkyl, alkenyl or arylalkyl group containing 1-10 carbon atoms, substituents R⁷, are the same or different and are alkyl, alkenyl, aryl, arylalkyl or alkylaryl containing 1-10 carbon atoms and they contain optionally Si or Ge atoms; W is 1,2 or 3; Z is 0 or 1; Y is 3; W is Z; (C) with water, organometallic compound to water molar ratio varying from 1:1 to 100:1. Catalysts have higher activity as compared with well known catalysts which use aluminium compound other than those given above. EFFECT: more efficient polymerization methods. 19 cl, 33 ex, 7 tbl