Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

External electron donor for olefin polymerization catalyst, catalyst system and preparation method of polyolefin

An external electron donor and olefin polymerization technology, which is applied in the field of polyolefin preparation by olefin polymerization catalyst system, can solve the problems of high branching efficiency, large amount of monomer, and low efficiency of long-chain branching, and achieve increased melt elasticity, Effect of Long Chain Branching Efficiency Improvement

Active Publication Date: 2020-09-29
INST OF CHEM CHINESE ACAD OF SCI +2
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems existing in the prior art that it is difficult to form long-chain branched structures in situ for polyolefins prepared by using external electron donors; for polyolefins prepared by comonomers, the efficiency of long-chain branching is low , requires post-processing, and the problem of large amount of monomers. Provides an external electron donor for olefin polymerization catalysts, a catalyst system and a preparation method for polyolefins. The external electron donors for olefin polymerization catalysts catalyze olefin polymerization in a Ziegler-Natta catalyst system , the dosage is small, the isotacticity, molecular weight, and molecular weight distribution of polyolefin can be adjusted, and more importantly, polyolefin with long-chain branched structure can be obtained without post-treatment process, and the branching efficiency is high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • External electron donor for olefin polymerization catalyst, catalyst system and preparation method of polyolefin
  • External electron donor for olefin polymerization catalyst, catalyst system and preparation method of polyolefin
  • External electron donor for olefin polymerization catalyst, catalyst system and preparation method of polyolefin

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The third aspect of the present invention provides a method for preparing polyolefin, wherein the method comprises: performing bulk polymerization, gas phase polymerization or slurry polymerization of olefin monomers in the presence of the above catalyst system.

[0042] In the present invention, the olefin may be, but not limited to: ethylene or propylene.

[0043] In the present invention, bulk polymerization refers to liquid phase bulk polymerization, for example, liquid propylene is subjected to bulk polymerization in the presence of the above-mentioned catalyst system.

[0044] In the present invention, gas-phase polymerization refers to the polymerization of olefin monomers in a gasified state, for example, the polymerization of gaseous propylene is catalyzed in the presence of the above-mentioned catalyst system.

[0045] In the present invention, slurry polymerization refers to the polymerization of olefin monomers catalyzed by the above-mentioned catalyst syste...

preparation example 1

[0057] (1) Preparation of two [3-(5-norbornenyl) propyl] diethoxysilane

[0058] Under the protection of nitrogen, 2.9g of magnesium chips were dispersed in 200ml of tetrahydrofuran solution, and 1-chloro-3(5-norbornene)propane (17.0g, 0.1mol) was dropped into the solution to prepare Grignard reagent 3(5- norbornene) propylmagnesium chloride.

[0059] 4.16g of tetraethoxysilane was dispersed in 500ml of tetrahydrofuran, and 0.042mol of 3(5-norbornene)propylmagnesium chloride in tetrahydrofuran was slowly added dropwise thereto, and reacted at room temperature for 24h. Product A was obtained by distillation under reduced pressure.

[0060] The hydrogen spectrum of A: 1 H NMR (300MHz, CDCl 3 ,ppm)δ:0.61(t,4H),1.21(m,16H),1.56(m,6H),1.75(m,2H),2.58(m,2H),2.84(m,2H),3.83(q ,4H),5.98(m,4H). The hydrogen spectrum is as follows figure 2 shown.

[0061] A carbon spectrum: 13 C NMR (300MHz, CDCl 3 , ppm) δ: 15.4, 33.6, 35.7, 47.2 (CH 2 ), 17.3 (SiCH 2 ), 18.4 (OCH 2 CH 3 )...

preparation example 2

[0064] (1) Preparation of two [3-(4-cyclohexenyl) propyl] diethoxysilane

[0065] Under the protection of nitrogen, 2.9g of magnesium chips were dispersed in 200ml of tetrahydrofuran solution, and 1-chloro-3(4-cyclohexenyl)propane (15.8g, 0.1mol) was dropped into the solution to prepare Grignard reagent 3(4 -cyclohexenyl)propylmagnesium chloride.

[0066] 2.08 g of tetraethoxysilane was dispersed in 500 ml of tetrahydrofuran, and 0.022 mol of 3(4-cyclohexenyl)propylmagnesium chloride in tetrahydrofuran was slowly added dropwise, and reacted at room temperature for 24 hours. Product B was obtained by distillation under reduced pressure.

[0067] The hydrogen spectrum of B: 1 H NMR (300MHz, CDCl 3 ,ppm)δ:0.61(t,4H),1.23(m,14H),1.35(m,2H),1,60(m,4H),2.11(m,8H),3.83(q,4H),5.65 (4H). The hydrogen spectrum is as follows Figure 4 shown.

[0068] Carbon spectrum of B: 13 C NMR (300MHz, CDCl 3 , ppm) δ: 15.1, 23.1, 29.3, 36.4, 38.2 (CH 2 ), 17.3 (SiCH 2 ), 18.4 (OCH 2 CH 3...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to the field of catalysts for olefin polymerization, and discloses an external electron donor for olefin polymerization catalysts, a catalyst system, and a polyolefin preparation method, wherein the external electron donor has a structure represented by a formula (I) defined in the specification, R1 is a cycloolefin group or a norbornene group, h is an integer of 0-20, and R2 is methyl or ethyl. According to the present invention, with the application of the external electron donor to catalyze olefin polymerization in a Ziegler-Natta catalyst system, the consumption of the external electron donor is low, the isotacticity, the relative molecular weight and the relative molecular weight distribution of the polyolefin can be regulated, more importantly the polyolefin having a long chain branching structure can be obtained, the branching efficiency is high, and the post-treatment process is not needed.

Description

technical field [0001] The invention relates to the field of catalysts for olefin polymerization, in particular to an external electron donor for olefin polymerization catalysts, an olefin polymerization catalyst system, and a method for preparing polyolefins from the olefin polymerization catalyst system. Background technique [0002] Since Ziegler and Natta pioneered the field of polymer synthesis of Ziegler-Natta (Ziegler-Natta) catalyst system in the 1950s, the development of Ziegler-Natta catalysts can be divided into five generations, the first generation being δ-TiCl 3 AlCl 3 -AlEt 2 Cl system, the second generation is δ-TiCl 3 · R 2 O-AlEt 2 Cl system, the third generation is TiCl 4 / monoester / Mg 2 Cl 2 -AlR 3 / monoester system, the fourth generation is TiCl 4 / Diester / MgCl 2 -AlEt 3 / siloxane system, the fifth generation is TiCl 4 / diether / MgCl 2 -AlEt 3 . At present, the catalysts used in the industrial production of polypropylene are mainly the four...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F110/06C08F110/02C08F4/646C08F4/645
Inventor 杨婷婷王立才秦亚伟李伟董金勇郑国彤
Owner INST OF CHEM CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com