| 摘要 |
The present invention provides a solid catalyst component for the polymerization of olefins, comprising magnesium, titanium, a halogen and an electron donor, wherein said electron donor comprises at least one selected from the group consisting of ester of polyol of the formula (I): <?in-line-formulae description="In-line Formulae" end="lead"?>R<SUB>1</SUB>CO-O-CR<SUB>3</SUB>R<SUB>4</SUB>-A-CR<SUB>5</SUB>R<SUB>6</SUB>-O-CO-R<SUB>2</SUB> (I)<?in-line-formulae description="In-line Formulae" end="tail"?> wherein, R<SUB>1 </SUB>and R<SUB>2 </SUB>groups, which may be identical or different, can be substituted or unsubstituted hydrocarbyl having 1 to 20 carbon atoms, R<SUB>3</SUB>-R<SUB>6 </SUB>groups, which may be identical or different, can be selected from the group consisting of hydrogen, halogen or substituted or unsubstituted hydrocarbyl having 1 to 20 carbon atoms, R<SUB>1</SUB>-R<SUB>6 </SUB>groups optionally contain one or more hetero-atoms replacing carbon, hydrogen atom or the both, said hetero-atom is selected from the group consisting of nitrogen, oxygen, sulfur, silicon, phosphorus and halogen atom, two or more of R<SUB>3</SUB>-R<SUB>6 </SUB>groups can be linked to form saturated or unsaturated monocyclic or polycyclic ring A is a single bond or bivalent linking group with chain length between two free radicals being 1-10 atoms, wherein said bivalent linking group is selected from the group consisting of aliphatic, alicyclic and aromatic bivalent radicals, and can carry C<SUB>1</SUB>-C<SUB>20 </SUB>linear or branched substituents one or more of carbon atom and/or hydrogen atom on above-mentioned bivalent linking group and substituents can be replaced by a hetero-atom selected from the group consisting of nitrogen, oxygen, sulfur, silicon, phosphorus, and halogen atom, and two or more said substituents on the linking group as well as above-mentioned R<SUB>3</SUB>-R<SUB>6 </SUB>groups can be linked to form saturated or unsaturated monocyclic or polycyclic ring.
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