Olefin polymerization catalyst and polyolefin

Details Olefin polymerization catalyst and polyolefin Olefin polymerization catalyst and polyolefin

C - Chemistry, Metallurgy

08

F

C08F 4/642 (2006.01) C08F 10/00 (2006.01) C08F 4/659 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2156690

A novel olefin polymerization catalyst is obtained by contacting the following components (1) to (5) with one another: (1) a compound represented by the general formula Me1R1p (OR2) q X1 4-p-q' wherein Me1 is Zr, Ti or Hf , R1 and R2 are each independently a hydrocarbon group having 1 to 24 carbon atoms, X1 is a halogen atom, p and q are each an integer falling within the ranges of 0 <= p < 4 or 0 <= q < 4, with the proviso that 0 <= p+q <= 4; (2) a compound represented by the general formula Me2R3m(OR4)n X2z-m-n' wherein Me2 is a Group I-III element of the Periodic Table, R3 and R4 are each independently a hydrocarbon group having 1 to 24 carbon atoms, X 2 is a halogen atom or a hydrogen atom, provided that when X2 is a hydrogen atom, Me2 is a Group III element in the Periodic: Table, z is the valence of Me2, m and n are each an integer falling with the ranges of 0 <= m <= z or 0 <= n <= z, with the proviso that 0 <= m+n <= z; (3) an organocyclic compound having conjugated double bonds; (4) a modified organoaluminum compound having at least Al-O-Al bond; and (5) an oxide selected from the group consisting of silicon oxide, aluminum oxide and mixtures thereof, the component(5) satisfying the following characteristics (A) to (E): (A) an average particle diameter as measured by a sieving method in the range of 20 to 150 µm, (B) a specific surface area as measured by a BET method in the range of 150 to 600 m2/g, (C) the volume of pores for a pore radius ranging from 18 to 1,000 Angstroms as measured by a mercury penetration method, in the range of 0.3 to 2.0 cm3/g, and the ratio of the volume of pores for a pore radius ranging from 50 to 500 .ANG. to the volume of pores fox- a pore radius ranging from 18 to 1,000 .ANG., of not less than 50%, (D) an apparent specific gravity as measured according to JIS K6220-6.8 not lower than 0.32, and (E) after the particles classified in the range of 53 to 75 µm by a sieving method have been subjected to an ultrasonic disintegration treatment at 40 KHz, 35W, for 20 minutes, the proportion of 50 µm or smaller particles is not more than 30%.

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