Olefin Polymerization Catalyst Components

Abstract

The invention relates to an olefine polymerization catalyst component, which comprises a special unsaturated heterocyclic maleicamide compound serving as an internal electron donor of a general formula (I). The unique electronic effect and stereohindrance effect of the maleicamide compound improves the properties of the catalyst; therefore, when the maleicamide compound is used in polymerization (copolymerization) of propylene, the catalyst demonstrates higher activity, stereospecificity and hydrogen regulation sensitivity, and the molecular weight distribution of a polymer is wide, which is favorable for the development of polymers with different trade marks.

Description

technical field [0001] The present invention relates to a catalyst component for olefin polymerization, in particular to a catalyst component for propylene (co)polymerization. Background technique [0002] It is well known that solid titanium catalysts based on magnesium, titanium, halogens and internal electron donors can be used for CH 2 =CHR Olefin polymerization reaction, especially suitable for α-olefin polymerization with 3 or more carbon atoms, can obtain polymers with higher yield and higher stereoregularity. Among them, the internal electron donor is one of the essential components in the catalyst. With the development of the internal electron donor compound, the polyolefin catalyst is constantly updated. [0003] Earlier, a large number of internal electron donor compounds were reported in the literature, such as polycarboxylic acids, monobasic or polycarboxylic acid esters, acid anhydrides, ketones, monoethers or polyethers, alcohols, amines, etc. and their deriv...

AI Technical Summary

Problems solved by technology

EP0045977 discloses that unsubstituted maleate is used as an internal electron donor compound for the polymerization of olefins, but the activity and stereospecificity of polymerization are all poor; US5436213 discloses unsubstituted and 2-methyl unsubstituted maleic acid Ester is used as an internal electron donor, but the activity of the catalyst is also low; JP58-138708 discloses a kind of internal electron donor—an ester formed by a straight-chain alcohol and a substituted or unsubstituted maleic acid, but the performance of the catalyst is between activity and Stereospecificity remains unsatisfactory

CN1714105A, EP2002010049 and WO2003022894 disclose a series of monosubstituted and disubstituted maleic acid esters as internal electron donors, the activity and stereospecificity of the catalyst are all higher, but the compound is structurally 2, and the 3-position substituting group has no Bonding each other to form a ring, the synthesis of the compound is difficult and costly

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