| 摘要 |
A process for polymerizing an alpha -olefin which comprises contacting the alpha -olefin at a temperature of about 10 DEG C. to about 100 DEG C. with a catalyst comprising a slurry component (A) and an organometallic component (B), the component (A) being obtained, without intermediate or final solids separation, by reacting (1) a slurry reaction mixture produced by reacting one mol of (i) a hydrocarbon-soluble organomagnesium component of the general formula M alpha Mg beta Rp1Rq2XrYs or of the reaction product of M alpha Mg beta Rp1Rq2XrYs with at least one electron donor selected from the group consisting of ethers, thioethers, ketones, aldehydes, carboxylic acids or derivatives thereof, alcohols, thioalcohols and amines, with 0.1 to 10 mols of (ii) a chlorosilane compound of the formula HaSiClbR4-(a+b)10 at a temperature of about 20 DEG C. to about 150 DEG C., with (2) a titanium compound of the formula Ti(OR11)nZ4-n and (3) a nitrogen- or sulfur-containing heterocyclic carboxylic acid ester or a hydrocarbyl carboxylic acid ester and the mol ratio of (2) the titanium compound/(3) the carboxylic acid ester being at least 0.3. |
