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Preparing method of polyaniline blended corrosion-prevention strippable paint

A polyaniline and blending technology, applied in the field of coatings, can solve the problems of poor anti-corrosion performance, easy to be worn, and the film layer cannot withstand high-temperature heat treatment of electroplating, so as to improve wear resistance and anti-corrosion performance, and improve high temperature resistance performance effect

Inactive Publication Date: 2019-08-27
曾祥民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem mainly solved by the present invention is that most of the current peelable coatings are polyurethane as the film-forming component, which is easily worn during transportation, storage and assembly when applied to important equipment, and the film layer cannot withstand high-temperature heat treatment of electroplating. The defect of poor corrosion performance provides a preparation method for polyaniline blended anti-corrosion peelable coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] Preparation of latex powder:

[0032] In parts by weight, add 70 parts of deionized water and 8 parts of sodium lauryl sulfate to a three-necked flask with a stirrer and a dropping funnel, start the stirrer, and stir at 300r / min for 45 minutes to obtain Emulsion, after adding 40 parts of aniline to the pre-emulsion, use a dropping funnel to drip 20 parts of 5% by mass ammonium persulfate solution into a three-necked flask at a dropping rate of 3 mL / min. After the addition is complete, at room temperature After reacting for 6 hours and discharging, a polyaniline emulsion is obtained;

[0033] Add 50mL of acetone to 200mL of polyaniline emulsion and break the emulsion for 2h to obtain a polyaniline suspension emulsion. Place the polyaniline suspension emulsion in a high-speed centrifuge, centrifuge at 4000r / min for 10 minutes, and then suction filter to remove the filtrate to obtain a filter Cake, wash the filter cake with deionized water for 3 times, place the product after ...

example 2

[0040] Preparation of latex powder:

[0041] In parts by weight, add 75 parts of deionized water and 9 parts of sodium lauryl sulfate to a three-necked flask with a stirrer and a dropping funnel, start the stirrer, and stir for 47 minutes at a speed of 315r / min. Emulsion, after adding 45 parts of aniline to the pre-emulsion, use a dropping funnel to drip 22 parts of 5% by mass ammonium persulfate solution into a three-necked flask at a dropping rate of 4 mL / min. After the addition is complete, at room temperature After reacting for 6.5 hours and discharging, a polyaniline emulsion is obtained;

[0042] Add 55 mL of acetone to 210 mL of polyaniline emulsion and demulsify for 2.5 hours to obtain a polyaniline suspension emulsion. Place the polyaniline suspension emulsion in a high-speed centrifuge, centrifuge at 4200r / min for 11 minutes, and filter with suction to remove the filtrate. For the filter cake, wash the filter cake with deionized water 4 times, place the product after suc...

example 3

[0049] Preparation of latex powder:

[0050] In parts by weight, add 80 parts of deionized water and 10 parts of sodium lauryl sulfate to a three-necked flask with a stirrer and a dropping funnel, start the stirrer, and stir at 330r / min for 50 minutes to obtain Emulsion, after adding 50 parts of aniline to the pre-emulsion, use a dropping funnel to drip 25 parts of 5% by mass ammonium persulfate solution into a three-necked flask at a dropping rate of 5 mL / min. After the addition is complete, at room temperature React for 7 hours and discharge to obtain polyaniline emulsion;

[0051] 60mL of acetone was added to 220mL of polyaniline emulsion and demulsified for 3h to obtain polyaniline suspension emulsion. The polyaniline suspension emulsion was placed in a high-speed centrifuge, centrifuged at 4500r / min for 12min, and then filtered with suction to remove the filtrate to obtain a filter For the cake, wash the filter cake with deionized water 5 times, place the product after suctio...

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Abstract

The invention discloses a preparing method of a polyaniline blended corrosion-prevention strippable paint, and belongs to the technical field of paints. A matrix can be coated with the polyaniline blended corrosion-prevention strippable paint through electrophoretic deposition. A high-density alumina film not only improves the high-temperature resistance of the strippable paint, but also improvesthe wear resistance and corrosion resistance of a coating. The strippable paint is a blended paint of polyaniline and epoxy resin; since the polyaniline has poor adhesion to the metal matrix, the epoxy resin serves as a blended film formation ingredient, and after the surface of the metal is coated with the paint, a reaction can be carried out between the paint and the metal; due to the inductivecoupling function of the polyaniline, a very thin oxidation film is formed on the surface of the metal, and the corrosion resistance is improved, so that the corrosion speed is lowered, and the polyaniline has good electrical conductivity and electrochemical activity; under metal protection, the polyaniline in this form not only has a certain mechanical isolation effect, but also has a certain catalytic deactivation effect, so that the coating has good corrosion resistance, and the application prospect is broad.

Description

Technical field [0001] The invention discloses a preparation method of polyaniline blended anticorrosive peelable paint, which belongs to the technical field of paint. Background technique [0002] Peelable paint refers to a paint that is used to temporarily protect metal materials, mechanical parts, electrical products, etc., so that the surface is not damaged during processing, storage, and transportation, and has short-term anti-rust and anti-pollution functions. [0003] Usually, after the completion of the main construction project, a lot of decoration is required. It is necessary to use a protective film to temporarily protect the completed part, and after the overall completion, it can be removed as a whole without leaving traces such as scratches. In addition to construction projects, many equipment and other products are often worn, scratched, and contaminated during transportation, storage and assembly. At the same time, due to the limitation of storage conditions, it w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/02C09D163/00C09D5/20C09D5/08C09D7/61C08G73/02
CPCC08G73/0266C08K2003/2227C08L2201/08C09D5/08C09D5/18C09D5/20C09D7/61C09D163/00C09D179/02C08L63/00C08K3/22C08L79/02
Inventor 曾祥民
Owner 曾祥民
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