| 摘要 |
FIELD: medicine. ^ SUBSTANCE: there is described catalyst component for ethylene polymerisation, containing reaction product of magnesium complex at least one titanium compound, at least one alcoholic compound, at least one silicon compound and optionally organoaluminium compound, wherein magnesium complex represents a product of magnesium halogenide in a solvent system containing organic epoxide and organophosphorous compound; alcoholic compound represents linear or branched alkyl or cycloalkyl alcohol containing 1 to 10 carbon atoms, or aryl or aralkyl alcohol having 6 to 20 carbon atoms, and alcoholic compound is optionally substituted with one or more halogen atoms; titanium compound has general formula Ti(OR)aXb wherein R means C1-C14 aliphatic or aromatic hydrocarbyl, X is halogen, and means 0, 1 or 2, b is an integer 1 to 4, and a+b=3 or 4; silicon compound is organic silicon compound of general formula R1ÇèxR2ÇèySi(OR3)z wherein R1 and R2 independently represent hydrocarbyl or halogen atom, R3 means hydrocarbyl, 0 ëñ x ëñ 2, 0 ëñ y ëñ 2, 0 ëñ z ëñ 4 and x+y+z=4; organoaluminium compound has general formula AlR4ÇènX1Çè3-n wherein R4 means hydrogen or hydrocarbyl containing 1 to 20 carbon atoms, X1 is halogen atom and n has a value satisfying the inequality 1 <nëñ3. There is also described method for making the catalyst component for ethylene polymerisation therewith including the stages as follows: (1) magnesium halogenide dissolution in the solvent system containing organic epoxide and organic organophosphorous compound. The solvent system optionally, however preferentially in addition contains an inert thinner to form a homogeneous solution; (2) addition of alcoholic compounds prior to, after or during formation of homogeneous solution containing magnesium halogenide; (3) contacting the solution received at the stage (2) with titanium compound, with silicon compound added prior to, after or during contacting process to form a mixture; (4) slow heating of the mixture to temperature 60C to 110C and holding at this temperature for some time with a solid substance gradually deposited in heating; and (5) recovery of the solid substance formed at the stage (4) to produce the catalyst component, where: alcoholic compound represents linear or branched alkyl or cycloalkyl alcohol with 1 to 10 carbon atoms, or aryl or agalkyl alcohol with 6-20 carbon atoms, with alcoholic compound being optionally substituted with halogen atom (atoms); titanium compound has general formula Ti(OR)aXb wherein R represents C1-C14aliphatic or aromatic hydrocarbyl, X means halogen atom, and is equal to 0, 1 or 2, b represents an integer 1 to 4, and a+b=3 or 4; and silicon compound represents organic silicon compound of general formula R1ÇèXR2ÇèySi(OR3)z wherein R1 and R2 independently represent hydrocarbyl or halogen atom, R3 means hydrocarbyl, 0 ëñ x ëñ 2, 0 ëñ y ëñ 2, 0 ëñ z ëñ 4, and x+y+z=4. There is also described a catalyst for ethylene polymerisation which contains a reaction product of: (1) the catalyst component described above; and (2) organoaluminium cocatalyst of formula AlR5ÇènX2Çè3-n wherein R5 represents hydrogen or hydrocarbyl, with 1 to 20 carbon atoms, X stands for halogen atom, and n corresponds to the inequality 1<nëñ3. There is also described method of ethylene polymerisation including the stages as follows: (i) contacting of ethylene and optionally comonomer (comonomers) with the catalyst described above in polymerisation environment to make polymer; and (ii) recovery of polymer prepared at the stage (i). ^ EFFECT: catalysts are characterised with high catalytic activity and narrow polymer particle size distribution, and especially applicable for the method of suspension ethylene polymerisation. ^ 21 cl,4 tbl, 30 ex, 2 ex |
