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A kind of n-containing silane compound, its preparation method and its application for propylene polymerization

A technology of silane compounds and compounds, applied in the direction of silicon organic compounds, chemical instruments and methods, compounds of group 4/14 elements of the periodic table, etc., can solve problems such as environmental and human hazards

Active Publication Date: 2016-03-23
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, alkylsiloxane compounds are commonly used in industry, and they show good performance when added to olefin polymerization as external electron donors. However, with the development of the times, some external electron donors cannot meet people's requirements for catalyst activity and polymerization. isotacticity and performance requirements, and some external electron donors containing benzene rings, such as diphenyldimethoxysilane, will cause certain harm to the environment and the human body. Therefore, in order to better solve the above problems, we Researched the structure of new external electron donors and synthesized a series of novel external electron donors

Method used

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  • A kind of n-containing silane compound, its preparation method and its application for propylene polymerization
  • A kind of n-containing silane compound, its preparation method and its application for propylene polymerization
  • A kind of n-containing silane compound, its preparation method and its application for propylene polymerization

Examples

Experimental program
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Effect test

Embodiment 16

[0152] Heat the 5L high-pressure reactor to vacuumize, remove air and water, replace with nitrogen, repeat three times, and then add MgCl 2 Loaded TiCl 4 Catalyst solid component 20mg, the content of Ti in the solid component is 2.36wt%, the addition of triethyl aluminum is Al / Ti (mol)=600, two 1-tert-butyl imidazolidine dimethoxysilane, cyclohexyl Methyl dimethoxy silicon, the molar ratio of the two is 15:85, and the molar ratio of the two external electron donors to Ti is 20 in terms of moles, and then 16 mmol of hydrogen and 1.2 kg of propylene are added. The reactor was closed, and the temperature of the reactor was raised to 70°C to start polymerization. After 2 hours of reaction, the unreacted propylene was discharged to obtain polypropylene particles.

Embodiment 17-24

[0154] The polymerization process was the same as in Example 16, only the type and ratio of the composite external electron donor were changed. The polymerization results are shown in Table 2.

[0155] Table 2 Composite Catalytic System for Propylene Polymerization

[0156]

[0157]

[0158] D1: the first type of electron donor, D2: the second type of electron donor.

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Abstract

The invention discloses an N-containing silane compound used for propylene polymerization, and a preparation method thereof. The compound has a structure shown as a general formula (1), wherein R1 is selected from a linear chain or branched chain alkyl of C1-C6, a naphthenic group of C3-C8, an aryl of C6-C14 or a heteroaryl of C6-C14; R2 is selected from compounds having structural formula shown as the description; R3 is selected from OR1, R2, a linear chain or branched chain alkyl of C1-C6 or a naphthenic group of C3-C8; R6 does not exist or is selected from H, a linear chain or branched chain alkyl of C1-C8, a naphthenic group of C3-C10, an aryl of C6-C14 and a heteroaryl of C6-C14.

Description

technical field [0001] The invention relates to an N-containing silane compound, its preparation method and its application in olefin polymerization, especially propylene polymerization. Background technique [0002] Polypropylene (PP) material has the advantages of excellent mechanical properties, high thermal stability, excellent processing performance, wide adjustable range of crystallinity, good corrosion resistance, and can be recycled. It is widely used in industry, agriculture, construction, medical and health , military technology, daily life and other fields. In current industrial production, Ziegler-Natta catalysts are mainly used to prepare polypropylene. The Ziegler-Natta catalyst is mainly composed of a main catalyst and a cocatalyst (alkylaluminum, etc.). Catalyst activity or stereospecificity. Electron donors play a pivotal role in the development of Ziegler-Natta catalysts. The role of the external electron donor is mainly to selectively poison the active...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/04C07F7/18C08F10/00C08F10/06C08F4/646
Inventor 李化毅常贺飞张辽云胡友良
Owner INST OF CHEM CHINESE ACAD OF SCI