C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 7/00 (2006.01) C07F 9/00 (2006.01) C07F 11/00 (2006.01) C08F 4/622 (2006.01) C08F 10/00 (2006.01) G01F 1/22 (2006.01)
Patent
CA 2060767
ABSTRACT OF THE DISCLOSURE A catalyst for .alpha.-olefin polymerization which comprises the following components (A) and (B): component (A), which is a transition metal compound represented by the formula Q(C5H4-mR1,n) (C5H4-nR2n)MeXY wherein (C5H4-mRlm) and (C5H4-nR2n) respectively represent a conjugated five-membered ring ligand coordinating to a metal Me; R1 and R2, which may be the same or different and a plurality of each of which can be bonded together, respectively represent a hydrocarbyl group having l to 20 carbon atoms, a halogen atom, an alkoxy group, a silicon- containing hydrocarbyl. group, a phosphorus-containing hydrocarbyl group, a nitrogen-containing hydrocarbyl group or a boron-containing hydrocarbyl group; Q represents a bonding group which crosslinks the two conjugated five-membered ring ligand; Me represents a transition metal of the IVB-VIB group in the Periodic Table; X and Y, which may be the same or different, respectively represent hydrogen, a halogen atoms, a hydrocarbyl group, an alkoxy group, an amino group, a phosphorus-containing hydrocarbyl group or a silicon- containing hydrocarbyl group; m denotes an integer of O < m < 4 and n denotes an integer of 0 < n < 4; component (B), which is a methylisobutylalumoxane which satisfies the following conditions (a), (b) and (c): (a) the molar ratio of a methyl group to an isobutyl group being in the range of 4:1 to 1:4, (b) the chemical shift of 27Al-NMR being in the range of 160 ppm to 250 ppm and the peak having a half-height width of no smaller than 3000 Hz, and (c) it has a repeating unit of A1-0 in an amount of 2 to 100. The methylisobutylalumoxane is assumed to be novel.
Fujita Takashi
Sugano Toshihiko
Uchino Hideshi
Macrae & Co.
Mitsubishi Chemical Corporation
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