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Method for synthesizing aqueous polyaniline anticorrosive mastic coating material

A technology of water-based polyaniline and synthesis method, applied in anti-corrosion coatings and other directions, can solve the problems of insoluble polyaniline and sewage, and achieve the effects of simple method, fast drying and easy control

Inactive Publication Date: 2015-02-11
CHONGQING JINYU PIPELINE EQUIP
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Many solvent-based polyaniline anti-corrosion coatings have been researched and developed at home and abroad. The preparation method is to first synthesize water-based polyaniline, and then dry and pulverize it. A large amount of sewage is produced during the process, and polyaniline is difficult to dissolve

Method used

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Examples

Experimental program
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preparation example Construction

[0021] A kind of synthetic method of waterborne polyaniline anticorrosion mastic coating, comprises the steps:

[0022] Stir a certain amount of ammonium persulfate with a specified amount of deionized water, heat to dissolve, and set aside;

[0023] Add a certain amount of distilled water and dodecylbenzenesulfonic acid into a 500mL four-necked flask equipped with a booster electric stirrer, an electric heating mantle, and a high-speed disperser, and stir;

[0024] At a certain temperature, ammonium persulfate aqueous solution and aniline are added dropwise at the same time, kept for a certain period of time, and the material is discharged for later use;

[0025] Add high polymer emulsion, water-based polyaniline, anti-corrosion fillers and additives into the paint mixing tank, and disperse evenly at high speed to obtain water-based polyaniline anti-corrosion thick build coating.

Embodiment 1

[0027] Stir 2.323g of ammonium persulfate with 45ml of deionized water, heat to 75°C to dissolve, and set aside for use; add 80ml of distilled water and 3.343g of dodecylbenzenesulfonic acid to the In a 500mL four-neck flask with a heating mantle and a high-speed disperser, stir for 30min; at a temperature of 75°C, add 10% ammonium persulfate aqueous solution and 1.343g aniline dropwise at the same time, keep warm for 1h, and discharge the material for later use; Add the compound emulsion, 12% water-based polyaniline, 7% anti-corrosion filler and 3% additives into the paint let-down tank, and after high-speed dispersion is uniform, the water-based polyaniline anti-corrosion thick build coating is obtained.

Embodiment 2

[0029] Stir 3.323g of ammonium persulfate with 48ml of deionized water, heat to 76°C to dissolve, and set aside for use; add 90ml of distilled water and 3.367g of dodecylbenzenesulfonic acid to the In a 500mL four-neck flask with a heating jacket and a high-speed disperser, stir for 45min; at a temperature of 78°C, add 16% ammonium persulfate aqueous solution and 1.389g aniline dropwise at the same time, keep warm for 1.5h, and discharge the material for later use; Polymer emulsion, 17% water-based polyaniline, 8% anti-corrosion filler and 5% additives are added into the paint let-down tank, and after high-speed dispersion is uniform, the water-based polyaniline anti-corrosion thick build coating is obtained.

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PUM

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Abstract

The invention relates to a method for synthesizing an aqueous polyaniline anticorrosive mastic coating material. The method comprises the following steps: stirring a certain amount of ammonium persulfate with a specified volume of deionized water, and heating to dissolve for later use; adding a certain volume of distilled water and dodecylbenzene sulfonic acid into a 500mL four-mouthed flask which is provided with a boosted motor stirrer, an electric heating sleeve and a high-speed disperser, and stirring; dropwise adding an ammonium persulfate aqueous solution and aniline simultaneously at a certain temperature, carrying out heat preservation for certain time, and discharging for later use; adding a high polymer emulsion, aqueous polyaniline, anticorrosive filler and auxiliaries into a coating preparation tank, and uniformly dispersing at high speed, thereby obtaining the aqueous polyaniline anticorrosive mastic coating material. The method disclosed by the invention is simple and is low in cost and easy in control, and the synthesized aqueous polyaniline anticorrosive mastic coating material has good stability, high-temperature resistance and oxidation resistance and is high in drying speed.

Description

technical field [0001] The invention relates to a synthesis technology of an organic coating, in particular to a synthesis method of a water-based polyaniline anti-corrosion mastic coating. Background technique [0002] Corrosion of steel is ubiquitous. According to statistics, metal equipment and materials scrapped due to corrosion each year are equivalent to 1 / 3 of the annual output of metals, resulting in huge losses. There are many anti-corrosion methods, but the most common, economical and practical protection measures so far are coating protection. Coating anti-corrosion is characterized by its simple construction, economical applicability, free from the constraints of equipment area and shape, and certain decorative effects. is widely used. [0003] The study found that the polyaniline film synthesized by electrochemical method in acidic medium can passivate the surface of stainless steel and have corrosion resistance. This feature has attracted people's attention. ...

Claims

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Application Information

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IPC IPC(8): C09D179/02C09D5/08C08G73/02
CPCC09D179/02C08G73/0266C09D5/08
Inventor 肖代伟
Owner CHONGQING JINYU PIPELINE EQUIP
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