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US 5,476,825 AGranted
Catalyst for polymerization of olefin and process for producing olefin polymer
AssigneeShowa Denko K.K.
InventorsMasaki Fushimi, Toshio Fujita, Minoru Suzuki
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Abstract
A catalyst for polymerization of olefin, which is capable of producing an olefin polymer with high stereoregularity and narrow molecular weight distribution, and which comprises (1) a solid catalyst component essentially containing titanium, magnesium and halogen, 2) an organoaluminum compound, and (3) a contact product of (A) an organometallic compound and (B) an organosilicon compound; and a process for producing a polymer using the above catalyst.
Claims11
A catalyst for polymerization of an olefin, comprising:
- (1) a solid catalyst component essentially containing titanium, magnesium, and a halogen atom,
- (2) an organoaluminum compound, and
- (3) a contact product obtained by contacting (A) an organometallic compound selected from the group consisting of triisobutylboron, triisobutylaluminum, trihexylaluminum and trioctylaluminum, and (B) an organosilicon compound selected from the group consisting of t-butyltrimethoxysilane and t-heptyltrimethoxysilane, at an (A) to (B) molar ratio of from 0.5/1 to 5/1 at a temperature of not higher than 50.degree. C. for a contact time of not more than 10 hours.
Dependencies are inferred from the claim text.