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Composite external electron donor, olefin polymerization catalyst, application thereof, polyolefin and preparation method thereof

An external electron donor, olefin polymerization technology, applied in the field of olefin polymerization, to achieve the effect of high heat resistance and high fluidity

Active Publication Date: 2021-08-06
CHINA ENERGY GRP NINGXIA COAL IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem existing in the prior art that the preparation of polypropylene resin with both high heat resistance and high fluidity needs the help of degradation agents and nucleating agents, and provides a composite external electron donor, olefin Polymerization catalyst and its application and polyolefin and its preparation method

Method used

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  • Composite external electron donor, olefin polymerization catalyst, application thereof, polyolefin and preparation method thereof
  • Composite external electron donor, olefin polymerization catalyst, application thereof, polyolefin and preparation method thereof
  • Composite external electron donor, olefin polymerization catalyst, application thereof, polyolefin and preparation method thereof

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specific Embodiment approach

[0045] According to a preferred embodiment of the present invention, the first external electron donor compound is selected from the compound shown in formula I-1, the compound shown in formula I-2 and the compound shown in formula I-3 at least one of:

[0046]

[0047] In some embodiments of the present invention, the molar ratio of the first external electron donor compound to the second external electron donor compound is 0.1-1:1. Preferably, the molar ratio of the first external electron donor compound to the second external electron donor compound is 0.1-0.8:1, more preferably 0.2-0.6:1.

[0048] In the present invention, the combination of the two external electron donors and the active center of the polymerization reaction has a synergistic and competitive relationship. The combination of the first external electron donor and the active center is beneficial to obtain a high melt index of the polymer; the combination of the second external electron donor and the acti...

preparation example 1

[0120] Preparation Example 1 is used to prepare the first external electron donor compound A shown in formula I-1:

[0121]

[0122] (1) Preparation of Grignard reagent

[0123] Take a 500 ml three-neck flask with a magnet, a spherical condenser and a constant pressure dropping funnel, add magnesium powder (28.8 grams, 1.2 moles) and a little iodine elemental substance under nitrogen protection; add o-bromine in the constant pressure dropping funnel Anisole (1.0 mol) and tetrahydrofuran (200 ml), then add 5 ml of o-bromoanisole solution in tetrahydrofuran dropwise to the flask, stir for 3-5 minutes, and initiate the reaction; then dropwise add o-bromoanisole tetrahydrofuran solution; after the dropwise addition, heat to reflux for 1 hour to complete the preparation of the Grignard reagent.

[0124] (2) Synthesis of silane

[0125] Take a 2.5-liter three-neck flask with a magnet and a spherical condenser, add diisopropyldichlorosilane (185 grams, 1.0 mole) and 500 milliliter...

preparation example 2

[0127] Preparation Example 2 is used to prepare the first external electron donor compound B shown in formula I-2:

[0128]

[0129] According to the method of Preparation Example 1, the difference is that in step (1), an equivalent amount of 1-bromo-2-methoxy-3-methylbenzene Instead of o-bromoanisole, the obtained product was determined to be the first external electron donor compound B shown in formula I-2 (yield: 95% by weight) by proton nuclear magnetic resonance.

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Abstract

The invention relates to the field of olefin polymerization, and discloses a composite external electron donor, an olefin polymerization catalyst and application thereof, polyolefin and a preparation method thereof. The composite external electron donor contains a first external electron donor compound and a second external electron donor compound, the first external electron donor compound is selected from at least one of compounds with a structure as shown in a formula I; the second external electron donor compound has a structure as shown in a formula II; and the molar ratio of the first external electron donor compound to the second external electron donor compound is (0.1-1): 1. According to the external electron donor composition disclosed by the invention, the first external electron donor compound and the second external electron donor compound are combined for use, and when the obtained olefin polymerization catalyst is used for olefin polymerization reaction, polyolefin with high heat resistance and high flowability can be directly obtained through polymerization reaction without the help of a degradation agent and a nucleating agent.

Description

technical field [0001] The invention relates to the field of olefin polymerization, in particular to a composite external electron donor, an olefin polymerization catalyst and its application, polyolefin and its preparation method. Background technique [0002] Polypropylene is a thermoplastic synthetic resin with excellent performance. It has the advantages of low density, non-toxicity, easy processing, and good insulation performance. It is the best heat-resistant variety among general-purpose resins, and it can be recycled and reused. It has a wide range of applications in automobiles, household appliances, electronics, packaging and building materials and furniture. Polypropylene resin has been the fastest-growing general-purpose resin in recent years, and it is expected that the growth rate of polypropylene demand will still be higher than that of other general-purpose resins in the next few years. [0003] In recent years, as people have more and more urgent requireme...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F110/06C08F4/646
CPCC08F10/00C08F110/06C08F4/6465C08F2500/12
Inventor 李刚健李化毅张利军李倩蒋生祥罗志王伟胡友良张荣武鹏飞王健刘聪
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD