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A kind of modified polyaniline/epoxy resin composite anticorrosion coating and preparation method thereof

A water-based epoxy resin and anti-corrosion coating technology, which is applied in epoxy resin coatings, anti-corrosion coatings, coatings, etc., can solve problems such as poor adhesion, low water resistance, and poor stability, and achieve improved corrosion resistance and water resistance. High performance and good stability

Active Publication Date: 2022-02-18
SHAANXI UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

The product of the invention can realize the unity of compatibility, rigidity and bonding strength of anti-corrosion coatings, and solve the common technical problems in the industry such as poor stability, low water resistance and poor adhesion of polyaniline / water-based epoxy resin composite anti-corrosion coatings. Surface anti-corrosion, which can greatly improve the anti-corrosion ability and water resistance of metal

Method used

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  • A kind of modified polyaniline/epoxy resin composite anticorrosion coating and preparation method thereof
  • A kind of modified polyaniline/epoxy resin composite anticorrosion coating and preparation method thereof
  • A kind of modified polyaniline/epoxy resin composite anticorrosion coating and preparation method thereof

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preparation example Construction

[0034] A kind of preparation method of modified polyaniline / waterborne epoxy resin composite anticorrosion coating of the present invention, comprises the following steps:

[0035] Dissolve 2-aminobenzenesulfonic acid and polymer surfactant in dilute hydrochloric acid, add aniline and dilute hydrochloric acid containing water-soluble initiator dropwise under ice-bath conditions, and continue the reaction after the dropwise addition is completed. Afterwards, the reaction solution is vacuum filtered and washed to neutrality, and the filter residue is vacuum-dried to obtain polyaniline;

[0036] Dissolve long-chain alkanes and tetramethylethylenediamine in ethanol solution and reflux at 80°C for continuous reaction. The resulting product is then recrystallized with a mixed solvent of acetone and isopropanol to obtain the cationic gemini surfactant N'N-bis(alkyldimethyl)-1,2-dibromide ethylenediammonium salt;

[0037] Add the polyaniline aqueous solution to the aqueous solution d...

Embodiment 1

[0055] 1) Dissolve 1 part of 2-aminobenzenesulfonic acid and 5 parts of polymer surfactant in 50 parts of 1M / L hydrochloric acid in parts by mass to obtain mixed solution A;

[0056] 2) Dissolving 5 parts of water-soluble initiator in 50 parts of 1M / L hydrochloric acid to obtain mixed solution B;

[0057] 3) Cool down the mixed solution A to 0°C, react for 0.5 hours, then add solution B and 5 parts of aniline dropwise separately and dropwise for 1 hour. Then continue to react for 4 hours to obtain mixed solution C;

[0058] 4) Carry out vacuum suction filtration on the mixed solution C and wash to neutrality, obtain the filter residue by suction filtration, and obtain polyaniline after vacuum drying;

[0059] 5) Dissolve 5 parts of dodecane bromide and 1.16 parts of tetramethylethylenediamine in 20 parts of ethanol solution, condense and reflux at 80°C, and react continuously for 33 hours to obtain solution D;

[0060] 6) Dry the solution D, then recrystallize it with a mixe...

Embodiment 2

[0070] 1) Dissolve 1 part of 2-aminobenzenesulfonic acid and 8 parts of polymer surfactant in 80 parts of 1M / L hydrochloric acid in parts by mass to obtain mixed solution A;

[0071] 2) Dissolving 8 parts of water-soluble initiator in 80 parts of 1M / L hydrochloric acid to obtain mixed solution B;

[0072] 3) Cool the mixed solution A to 2°C, react for 0.5 hours, then add solution B and 5 parts of aniline separately and dropwise for 1.5 hours. Then continue to react for 4 hours to obtain mixed solution C;

[0073] 4) Carry out vacuum suction filtration on the mixed solution C and wash to neutrality, obtain the filter residue by suction filtration, and obtain polyaniline after vacuum drying;

[0074] 5) Dissolve 5.54 parts of tetradecane bromide and 1.16 parts of tetramethylethylenediamine in 20 parts of ethanol solution, condense and reflux at 80°C, and react continuously for 33 hours to obtain solution D

[0075] 6) Dry the solution D, then recrystallize it with a mixed solu...

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Abstract

The invention discloses a modified polyaniline / water-based epoxy resin composite anticorrosion coating and a preparation method thereof, comprising: dissolving 2-aminobenzenesulfonic acid and a polymer surfactant in dilute hydrochloric acid, adding aniline and water-soluble dilute hydrochloric acid as initiator to obtain polyaniline; dissolve long-chain alkanes and tetramethylethylenediamine in ethanol solution and carry out condensation and reflux continuous reaction to obtain cationic gemini surfactant; add polyaniline aqueous solution to dissolve cationic In the aqueous solution of sex gemini surfactant, obtain the polyaniline modified by cationic gemini surfactant; Dissolve the modified polyaniline in water and make it disperse, add epoxy resin emulsion, curing agent, water, defoamer, A leveling agent and a wetting agent are dispersed to obtain a cationic gemini surfactant modified polyaniline / epoxy resin composite anticorrosion coating. The paint of the invention is used for anticorrosion of metal surfaces, and can greatly improve the anticorrosion ability, water resistance and the like of the metal.

Description

technical field [0001] The invention belongs to the field of anticorrosion paint preparation, in particular to a modified polyaniline / epoxy resin composite anticorrosion paint and a preparation method thereof. Background technique [0002] Epoxy resin has excellent bonding strength and film-forming properties, and can be used in the field of metal anti-corrosion, but if the metal is only coated with epoxy resin, the anti-corrosion effect is not very good. Epoxy resin can be compounded with polyaniline, and polyaniline can undergo redox reaction on the metal surface to form a dense oxide film, thereby protecting the metal from corrosion. In order to solve the problems of poor solubility and mechanical properties of polyaniline, polyaniline will be modified by N'N-bis(alkyldimethyl)-1,2-dibromide ethylenediammonium salt The research on polyaniline and its use in the preparation of cationic gemini surfactant-modified polyaniline has not been reported. [0003] Compared with p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D179/02C09D5/08C08G73/02
CPCC09D163/00C09D5/08C08G73/0266
Inventor 王海花张盼费贵强马永宁刘璇孙立宇
Owner SHAANXI UNIV OF SCI & TECH
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