FIELD: chemistry.
SUBSTANCE: invention relates to polymerisation of CH2=CHR olefins, where R is hydrogen or a C1-C12hydrocarbon group, and to catalysts therefor. A pre-polymerised catalyst component contains a solid component containing Mg, Ti, a halogen and an electron donor (ID), selected from alkyl esters of aromatic dicarboxylic acids. The molar ratio ID/Mg ranges from 0.025 to 0.065 and the molar ratio Mg/Ti is greater than 13. Said pre-polymerised catalyst component contains up to 50 g of an ethylene prepolymer per g of said solid catalyst component.
EFFECT: improved activity of the pre-polymerised catalyst and minimising problems associated with catalyst discharge.
9 cl, 2 tbl, 3 ex
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| COMPONENT OF PREPOLYMERIC CATALYST, METHOD FOR ITS PREPARING, CATALYST FOR POLYMERIZATION OF OLEFINS AND METHOD FOR POLYMERIZATION OF OLEFINS USING THEREOF | 1999 |
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