Method of polymerizing .alpha.-olefins
AssigneeShowa Denko K.K.
InventorsIsamu Yamazaki, Yoichi Toyama, Kiwami Hirota, Hisashi Takeuchi
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Abstract
In the method of polymerizing .alpha.-olefins by contacting an .alpha.-olefin under polymerization conditions with a stereospecific catalyst comprising a titanium trichloride component and an organoaluminium compound, the improvement wherein said titanium trichloride component is ground during or after contact with a treating agent, said treating agent being selected from at least one of A. an alkylene oxide, and B. a lactone.
Claims2
In a method of polymerizing alpha-olefins and styrene by contacting an alpha-olefin or styrene under polymerization conditions with a stereospecific catalyst comprising (a) a titanium trichloride component containing aluminum chloride as a solid solution and (b) an organo-aluminum compound, the improvement consisting of subjecting said titanium trichloride component to grinding during or after contact with a treating agent for a period of from about 5 to 50 hours in an impact, ball or vibratory mill, and in an inert atmosphere at a temperature of from room temperature to about 200.degree. C., said treating agent being a lactone selected from beta-propiolactone, gamma-butyrolactone, gamma-valerolactone, gamma-nonalactone, epsilon-caprolactone, and coumarine, and said titanium trichloride being contacted with said treating agent so that 0.01-1 mol of said treating agent is incorporated in 1 mol of said titanium trichloride.
Dependencies are inferred from the claim text.