Catalyst component for high temperature olefin polymerization, and preparation method thereof

Abstract

The present invention relates to a catalyst component for high temperature olefin polymerization. According to the present invention, metal magnesium and an alcohol are adopted and are subjected to a reaction in the presence of a halogenating agent to prepare a spherical dialkyloxy magnesium carrier with an excellent performance; then the carrier, a titanium compound and an electron donor compound are subjected to a contact reaction in an inert diluent agent to obtain a high temperature polymerization solid catalyst component; and the solid catalyst component is adopted as a main catalyst, an organic aluminum compound is adopted as an auxiliary catalyst, and an organosilicon compound is adopted as a stereo orientation agent, wherein the resulting catalyst component is particularly suitable for propylene homopolymerization or copolymerization of propylene and other olefins. Polymerization results show that the catalyst of the present invention provides higher activity than the conventional catalyst, and the resulting polymer has characteristics of high melt index, high isotacticity, and low fine powder content. With the present invention, high performance resin products can be developed, and broad application prospects are provided.

Description

technical field

[0001] The invention relates to a catalyst component used for high-temperature polymerization or copolymerization of olefins and a preparation method thereof, and a catalyst containing the catalyst component and its application in high-temperature polymerization of olefins. technical background

[0002] Generally, olefin polymers are polymerized using a Ziegler-Natta catalyst composed of a titanium compound and an organoaluminum compound. For example, patents such as CN 85100997A and CN 1453298A use a solid catalyst component mainly composed of titanium, magnesium, chlorine and an electron donor compound, an organoaluminum compound as an auxiliary catalyst component, and a stereoregular catalyst component in the preparation of polypropylene. The catalyst of the alkoxy-organosilicon compound of the property-enhancing agent is obtained to obtain a propylene polymer. At present, the research on catalysts mainly focuses on the following aspects: improving the po...

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