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

A kind of copolymerization method of ethylene and terminal alkenyl silane/siloxane

A technology of terminal alkenyl silane and siloxane, which is applied in the field of copolymerization of ethylene and terminal alkenyl silane/siloxane, can solve the problems of low polymerization activity, inability to carry out copolymerization reaction, high price and the like, and achieves high polymerization activity, Broad industrial application prospects and the effect of increasing the content

Active Publication Date: 2020-07-24
CHINA PETROLEUM & CHEM CORP +1
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, patent document WO 03 / 044066 A2 discloses that late transition metal complexes of bidentate or tridentate ligands can be used to copolymerize ethylene with allyl- or vinyl-silane, however, this method requires expensive modifications. Methylaluminoxane (MMAO) is used as a cocatalyst, and it is polymerized at a relatively high ethylene polymerization pressure of 4.0-6.0 MPa, and the molecular weight and branching degree of the obtained polymer are relatively low
Dalton Transaction, 2015, 44(47): 20745-20752 uses pyridinediimide iron-based catalysts to catalyze the copolymerization of propylene and silicon-containing polar monomers. This method still needs to use MMAO as a co-catalyst and requires a temperature of 30°C or even lower Polymerization reaction at 0°C for 16 hours, and the polymerization activity is low, and the copolymerization reaction cannot be carried out when the temperature 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
  • A kind of copolymerization method of ethylene and terminal alkenyl silane/siloxane
  • A kind of copolymerization method of ethylene and terminal alkenyl silane/siloxane
  • A kind of copolymerization method of ethylene and terminal alkenyl silane/siloxane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0026] According to a preferred embodiment of the present invention, the main catalyst is selected from at least one of the following complexes,

[0027] Complex 1: R 1 =R 3 =R 4 =R 6 = Me,R 2 =R 5 = H, X = Br;

[0028] Complex 2: R 1 =R 3 =R 4 =R 6 =Et,R 2 =R 5 = H, X = Br;

[0029] Complex 3: R 1 =R 3 =R 4 =R 6 =iPr,R 2 =R 5 = H, X = Br;

[0030] Complex 4: R 1 =R 2 =R 3 =R 4 =R 5 =R 6 =Me, X=Br;

[0031] Complex 5: R 1 =R 3 =R 4 =R 6 = Me,R 2 =R 5 =Br, X=Br;

[0032] Complex 6: R 1 =R 3 =R 4 =R 6 = Me,R 2 =R 5 = Et, X = Br;

[0033] Complex 7: R 1 =R 3 =R 4 =R 6 =Et,R 2 =R 5 =Me, X=Br;

[0034] Complex 8: R 1 =R 3 =R 4 =R 6 =Et,R 2 =R 5 =Br, X=Br;

[0035] Complex 9: R 1 =R 3 =R 4 =R 6 = F, R 2=R 5 = H, X = Br;

[0036] Complex 10: R 1 =R 3 =R 4 =R 6 = Cl, R 2 =R 5 = H, X = Br;

[0037] Complex 11: R 1 =R 3 =R 4 =R 6 =Br,R 2 =R 5 = H, X = Br;

[0038] Complex 12: R 1 =R 3 =R 4 =R 6 = Me,R 2 =R 5...

Embodiment 1

[0099] The 1L stainless steel polymerization kettle equipped with mechanical stirring was continuously dried at 130°C for 6hrs, vacuumized while hot and heated with N 2 gas replacement 3 times; add 11.9 mg (10 μmol) of complex 3, then vacuumize and replace with ethylene 3 times; inject 500 mL of toluene, then add 6.5 mL of methylalumoxane (MAO) (1.53 mol / L toluene solution ), make Al / Ni=1000, 5mL allyltrimethoxysilane (28.7mmol), at 70°C, keep 10atm ethylene pressure, and stir for 30min. Finally, it was neutralized with an ethanol solution acidified with 5 volume % hydrochloric acid to obtain a polymer. The polymerization activity and the performance parameters of the polymer are shown in Table 1.

Embodiment 2

[0101] The 1L stainless steel polymerization kettle equipped with mechanical stirring was continuously dried at 130°C for 6hrs, vacuumized while hot and heated with N 2 gas replacement 3 times; add 11.9 mg (10 μmol) of complex 3, then vacuumize and replace with ethylene 3 times; inject 500 mL of toluene, then add 6.5 mL of methylalumoxane (MAO) (1.53 mol / L toluene solution ), make Al / Ni=1000, 5mL allyltrimethoxysilane (28.7mmol), at 100°C, keep 10atm ethylene pressure, and stir for 30min. Finally, it was neutralized with an ethanol solution acidified with 5 volume % hydrochloric acid to obtain a polymer. The polymerization activity and the performance parameters of the polymer are shown in Table 1.

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 invention belongs to the field of olefin copolymerization reactions, and provides a copolymerization method of ethylene and alkenyl-terminated silane / siloxane. The copolymerization method comprises that ethylene and alkenyl-terminated silane / siloxane are subjected to a copolymerization reaction in the presence of a catalyst composition, wherein the catalyst composition contains a main catalyst, a co-catalyst and an optional chain transfer agent, the main catalyst is at least one selected from coordination compounds represented by a formula (I), R<1>-R<10> are respectively and independentlyselected from hydrogen, saturated or unsaturated hydrocarbonyl, hydrocarbyloxy and the like, M is selected from a Group VIII metal, and X is a halogen. According to the present invention, the used catalyst composition has high polymerization activity in the ethylene and alkenyl-terminated silane / siloxane copolymerization reaction, can increase the contents of the copolymerization monomer and themethyl on the polymer molecular chain, and has broad industrial application prospects. The formula (I) is defined in the specification.

Description

technical field [0001] The invention belongs to the field of olefin copolymerization reaction, and in particular relates to a method for copolymerization of ethylene and terminal alkenyl silane / siloxane. Background technique [0002] Olefin copolymers containing vinylsilane or siloxane derivative groups can be used in many fields, such as various types of cable materials, pipes, adhesives, gaskets and cross-linked foams. Vinyl silane groups can be linked to olefin polymers by two methods: one method is to form olefins and vinyl silane compounds through high temperature and high pressure copolymerization under the catalysis of free radical initiators (such as US 3225018), This polymerization process is similar to ethylene high-pressure homopolymerization, and the resulting copolymer structure is similar to that of low-density polyethylene; another method is to graft an allyl- or vinyl-silane to an existing polystyrene. On olefin (as US 3646155), the advantage of grafting is ...

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): C08F210/02C08F230/08C08F4/70
CPCC08F210/02C08F230/08
Inventor 高榕周俊领李岩刘东兵赖菁菁傅捷
Owner CHINA PETROLEUM & CHEM CORP
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