| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to a component of a catalyst for polymerisation of olefins, including magnesium, titanium, halogen and an electron donor, wherein said electron donor is selected from at least one compound based on a diol diester of formula (I), and in said compounds based on diol diester of formula (I), content of said diol diester of formula (II) in a Fischer projection is not less than 35 wt%:. Wherein in formula (I) and formula (II) Rand Rmay be identical or different and represent C-Ccycloalkyl, C-Caryl or C-Calkylaryl or an arylalkyl group wherein said hydrogen atom attached to a carbon atom in said cycloalkyl, aryl, alkylaryl or arylalkyl group may be optionally substituted by a halogen atom, but Rand Rcan not both be C-Ccycloalkyl; Rand Rmay be identical or different and represent a hydrogen atom, a halogen atom, C-Cunbranched alkyl, C-Cbranched alkyl, C-Ccycloalkyl, C-Caryl or C-Calkylaryl or arylalkyl group, and Rand Rmay optionally be linked with each other to form a ring structure; and Rand Rmay be identical or different and represent a halogen atom, C-Cunbranched alkyl, C-Cbranched alkyl, C-Ccycloalkyl, C-Caryl or C-Calkylaryl or arylalkyl group, and a hydrogen atom attached to a carbon atom of said alkyl, aryl, alkylaryl or arylalkyl group may be optionally substituted by a halogen atom. Catalyst for polymerisation of olefins includes a certain catalyst component, an alkylaluminium compound, an external electron-donor component. Prepolymerisation catalyst for polymerisation of olefins includes a solid catalyst and a prepolymer obtained via prepolymerisation of solid catalyst and olefin, wherein prepolymerisation efficiency ranges from 0.1 to 1,000 g of olefin per gram of solid catalyst component. Invention also relates to a method of polymerisation of olefins, which is carried out in presence of said catalyst component, said catalyst or prepolymerisation catalyst.EFFECT: technical result is significant improvement of activity and stereospecificity of catalyst and isotactic index of obtained polymer with high melt index.22 cl, 2 tbl, 13 ex |
