| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: there is described method for making a catalyst component for copolymerisation of olefins CH2=CHR in which R is hydrogen or a hydrocarbon radical containing 2-12 carbon atoms, on a MgCl2 carrier, involving use of a Mg compound selected from a Lewis adduct from adducts with formula MgX2(R"OH)m, in which R" represents C1-C20 hydrocarbon groups, X is chlorine, and m ranges from 0.1 to 6, Ti compound and electron-donor compound (ED), selected from alcohol, alkyl ester C1-C20 of aliphatic carboxylic acids, ketones, amines, amides, nitriles, alkoxysilanes and aliphatic ethers as basic compounds. The said method includes two or more reaction steps involving use of at least one of the said basic compounds themselves as a fresh reagent or in a mixture in which they are the main component. The method is distinguished by that, at the last two or more reaction steps, the basic compound which is used as the fresh reagent is an ED compound. Also described is a solid catalyst component for copolymerisation of olefins CH2=CHR, in which R is hydrogen or a hydrocarbon radical containing 2-12 carbon atoms, including a Ti compound and an electron donor (ED), selected from alcohol, alkyl ester C1-C20 of aliphatic carboxylic acids, ketones, amines, amides, nitriles, alkoxysilanes, aliphatic ethers and esters of aliphatic carboxylic acids on a magnesium chloride carrier, in which molar ratio ED/Ti varies from 1.5 to 3.5, and molar ratio Mg/Ti exceeds 5.5. A catalyst is described for copolymerisation of olefins, for polymerisation of olefins CH2=CHR in which R is hydrogen or a hydrocarbon radical containing 2-12 carbon atoms, including a product obtained after contacting: (a) a solid catalyst component described above; (b) one or more compounds of alkyl aluminium and, optionally, (c) copolymerisation of olefins CH2=CHR in which R is hydrogen or a hydrocarbon radical containing 2-12 carbon atoms, carried out in the presence of the said catalyst. ^ EFFECT: increased stereospecificity of the catalyst. ^ 22 cl, 4 tbl, 30 ex |
