Poly 3,4-ethylenedioxythiophene/polyethyleneimine modified waterborne epoxy emulsion, preparation method thereof and anticorrosive coating

A technology of ethylenedioxythiophene and water-based epoxy emulsion, which is applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of poor solubility of PEDOT, poor dispersion of PEDOT, and affecting the application of PEDOT

Active Publication Date: 2021-12-07
泽铱(佛山)工业技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure PEDOT has extremely poor solubility, resulting in poor dispersion of PEDOT in coatings, which seriously affects the application of PEDOT in metal anticorrosion.

Method used

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  • Poly 3,4-ethylenedioxythiophene/polyethyleneimine modified waterborne epoxy emulsion, preparation method thereof and anticorrosive coating
  • Poly 3,4-ethylenedioxythiophene/polyethyleneimine modified waterborne epoxy emulsion, preparation method thereof and anticorrosive coating
  • Poly 3,4-ethylenedioxythiophene/polyethyleneimine modified waterborne epoxy emulsion, preparation method thereof and anticorrosive coating

Examples

Experimental program
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preparation example Construction

[0050] The invention provides a kind of preparation method of the water-based epoxy emulsion of PEDOT / PEI modification, comprises the steps:

[0051] S101: Mix EDOT monomers and solvents, then add an initiator, stir and react, and prepare a PEDOT dispersion.

[0052] Further, in step S101, the mass ratio of EDOT, solvent and initiator is (1-4):(20-80):(1-2).

[0053] Further, in step S101, the initiator is selected from one or more of ammonium persulfate, sodium persulfate and potassium persulfate.

[0054] Further, in step S101, the solvent is a mixture of alcohol and water; the alcohol is selected from one or more of methanol, ethanol and propanol.

[0055] Further, in step S101, the time for the stirring reaction is 1 hour to 10 hours, the temperature of the stirring reaction is 20-100° C., and further, the reaction temperature is 25° C.

[0056] Further, in step S101, the particle size of PEDOT in the PEDOT dispersion is 30-100 nm.

[0057] In the present invention, the...

Embodiment 1

[0109] This example provides a water-based epoxy emulsion modified by poly(3,4-ethylenedioxythiophene / polyethyleneimine) and its preparation method. The steps are as follows:

[0110] (1) Preparation of PEDOT dispersion

[0111] First dissolve 2g of EDOT monomer in a mixed solution of 20ml of alcohol and 20ml of water, then add 0.5g of ammonium persulfate, stir thoroughly, and after stirring for 1 hour, prepare a PEDOT dispersion. The infrared spectrum of the prepared PEDOT is as follows figure 1 As shown, the Raman spectrum of PEDOT nanoparticles is shown in figure 2 shown.

[0112] combine figure 1 and figure 2 ,Depend on figure 1 In the infrared spectrum of PEDOT, it can be seen that the wavelength is 721 -1 , 862 -1 、995cm -1 is the characteristic peak of the C-S stretching vibration in the thiophene ring; the wavelength is 1062 -1 、1123 -1 、1165cm -1 is the absorption peak of C-O-C bending vibration in PEDOT; the wavelength is 1265 -1 、1499cm -1 are the char...

Embodiment 2

[0119] The present embodiment provides a kind of anticorrosion paint (primer) and preparation method thereof, and the steps are as follows:

[0120] (1) Preparation of component A

[0121] 450g of PEDOT / PEI modified water-based epoxy emulsion prepared in Example 1, 10g of BYK-154 wetting and dispersing agent, 5g of BYK-028 defoamer, 5g of BYK-381 leveling agent, 150g of micaceous iron oxide ash, trimer Aluminum phosphate 80g, zinc phosphate 80g, 3000 mesh barium sulfate 100g, Pangel B40 hydrated magnesium silicate 10g, A200 fumed silica 10g, purified water 100g, mix all raw materials, stir and disperse on a high-speed disperser for 20-30min, then add Grinding with a sand mill, the particle size of the filler in the mixture after grinding is 25-30 μm, filtering and packing separately to obtain component A.

[0122] (2) Preparation of component B

[0123] Divide 200 g of polyetheramine BASF BS-725 water-based epoxy curing agent into subpackages to obtain component B.

[0124]...

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Abstract

The invention relates to the technical field of high-molecular polymer new materials, in particular to a poly 3,4-ethylenedioxythiophene / polyethyleneimine modified waterborne epoxy emulsion, a preparation method thereof and an anticorrosive coating. The preparation method comprises the following steps: mixing a 3,4-ethylenedioxythiophene monomer and a solvent, then adding an initiator, and carrying out a stirring reaction to prepare a poly (3,4-ethylenedioxythiophene) dispersion liquid; mixing polyethyleneimine and water-borne epoxy resin, and stirring to prepare a polyethyleneimine modified water-borne epoxy resin emulsion; and mixing the poly (3, 4-ethylenedioxythiophene) dispersion liquid, the polyethyleneimine modified waterborne epoxy resin emulsion and an auxiliary agent, and carrying out shearing emulsification. According to the PEDOT / PEI modified waterborne epoxy emulsion prepared by the preparation method, the dispersion stability of PEDOT in the waterborne epoxy emulsion is improved. The anticorrosive coating prepared from the PEDOT / PEI modified waterborne epoxy emulsion has the advantages of excellent corrosion resistance and favorable dispersion stability.

Description

technical field [0001] The invention belongs to the technical field of new polymer materials, and in particular relates to a water-based epoxy emulsion modified by poly(3,4-ethylenedioxythiophene / polyethyleneimine), a preparation method thereof, and an anti-corrosion coating. Background technique [0002] Anti-corrosion coatings are widely used in modern industry, transportation, energy, marine engineering and other departments. With the rapid development of the national economy and industrialization, the annual consumption of steel in my country is increasing, and steel is widely used in chemical industry, petroleum, metallurgy, machinery, light industry, marine engineering and ships, especially in metallurgy, chemical industry, Petroleum and offshore engineering fields. According to reports, my country's steel demand in 2019 is 800 million tons, and the crude steel output is 900 million tons. The total amount of steel corrosion accounts for 10-20% of the annual output, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C09D187/00C09D5/08
CPCC09D163/00C09D5/08C09D7/65C08L65/00
Inventor 易俊松张驰周剑齐福刚汤松松罗帅钟宏叶远超
Owner 泽铱(佛山)工业技术有限公司
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