Solvent-free epoxy anticorrosion paint with corrosion restoration function and preparation method thereof

An epoxy anti-corrosion coating, solvent-free technology, applied in the field of coatings, can solve problems affecting coating performance, short plate effect, performance deterioration, etc., achieve excellent anti-corrosion performance, improve corrosion resistance, and reduce the number of coatings Effect

Active Publication Date: 2014-04-09
哈尔滨工程大学船舶装备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of using the coating, there will always be defects in the coating due to various reasons, such as scratches, scratches, etc. These defects will become the weakest point affecting the performance of the coating, and become the so-called "short plate effect".
Furthermore, the performance of the coating gradually deteriorates during use. The focus of existing anti-corrosion coatings is only to slow down the deterioration of the coating as much as possible, but how to repair the anti-corrosion performance of the coating and the metal under the coating after the coating deteriorates. function is rarely reported

Method used

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  • Solvent-free epoxy anticorrosion paint with corrosion restoration function and preparation method thereof
  • Solvent-free epoxy anticorrosion paint with corrosion restoration function and preparation method thereof
  • Solvent-free epoxy anticorrosion paint with corrosion restoration function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Prepare the restorative composite filler as follows:

[0057] (a) Prepare a mixed aqueous solution of phosphoric acid and dodecylbenzenesulfonic acid: wherein the phosphoric acid is 1M, and the dodecylbenzenesulfonic acid is 0.5M.

[0058] (b) Prepare ammonium persulfate aqueous solution: ammonium persulfate is 2M.

[0059] (c) Add aniline to (a) mixed acid solution, the concentration of aniline is 3M. Stir well.

[0060] (d) Take 1000ml of (c), add 200g of zinc phosphate and 100g of montmorillonite into it, and stir evenly at 5°C.

[0061] (e) Gradually add 1000ml of (b) into (d), keep stirring, and control the temperature at 5°C for 4h. The reaction product was filtered, washed with distilled water until the pH of the solution was 4-5, and then filtered.

[0062] (f) Add the filtered product obtained in (e) to KH560 silane coupling agent methanol aqueous solution (methanol: water: coupling agent = 10:1:1) 1000ml, continue stirring for 48h, filter, and dry at 80°C....

Embodiment 2

[0067] Prepare the restorative composite filler as follows:

[0068] (a) Prepare a mixed aqueous solution of phosphoric acid and dodecylbenzenesulfonic acid: wherein the phosphoric acid is 0.5M, and the dodecylbenzenesulfonic acid is 2M.

[0069] (b) Prepare ammonium persulfate aqueous solution: ammonium persulfate is 3M.

[0070] (c) Add aniline to (a) mixed acid solution, the concentration of aniline is 2M. Stir well.

[0071] (d) Take 1000ml of (c), add 100g of zinc phosphate and 100g of montmorillonite into it, and stir evenly at 0°C.

[0072] (e) Gradually add 1000ml of (b) into (d), keep stirring, and control the temperature at 0°C for 4h. The reaction product was filtered, washed with distilled water until the pH of the solution was 4-5, and then filtered.

[0073] (f) Mix the filtered product obtained in (e) with 5ml of JN14 titanate coupling agent, place it for 48 hours, filter, dry at 100°C, and grind it finely to obtain the polyaniline modified polyaniline treat...

Embodiment 3

[0078] 1) Mix 10 parts of reactive diluent (6690), 0.5 parts of defoamer (Defom5300), 5 parts of dispersant (Disperbyk163) and 100 parts of novolac epoxy resin (F51), and then add the ingredients in Example 2 in sequence. Prepared titanate coupling agent-treated polyaniline modified zinc phosphate and montmorillonite composite filler 20 parts, titanium dioxide 10 parts, filler (mica iron oxide) 50 parts, leveling agent (BYK354) 3 parts, in Disperse in a high-speed disperser for 60 minutes to make component A.

[0079] 2) Add 20 parts of polyamide 651# to 5 g of reactive diluent 6690 and mix evenly to prepare component B.

[0080] 3) According to component A: component B = 2:1, mix components A and B evenly, and apply the coating on the AZ91D magnesium alloy test piece with a surface roughness of Sa2.5, and cure it at room temperature for 7 days before coating. Layer performance testing. The coating thickness is 120±10 μm.

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Abstract

The invention provides a solvent-free epoxy anticorrosion paint with the corrosion restoration function and a preparation method thereof. The paint comprises a component A and a component B, wherein the component A comprises, by weight, 30-100 parts of an epoxy resin, 0-30 parts of an active diluent, 1-20 parts of a restoration composite filler, 1-10 parts of a pigment, 20-50 parts of a filler, 0.1-5 parts of an antifoaming agent, 3-10 parts of a dispersant and 0.1-3 parts of a leveling agent; and the component B comprises, by weight, 0.5-100 parts of an amine curing agent and 0.5-20 parts of the active diluent. The solvent-free epoxy anticorrosion paint with the corrosion restoration function of the invention, which can be applied to facilities and parts of water conveying pipelines, steel and aluminum ships, bridges, offshore petroleum platforms, wharf facilities, airplane sheathes and the like, has a strong anticorrosion performance and a solution penetration resistance, has a restoration effect on defect parts of scores, scratches and the like, and can restore anticorrosion-deteriorated coatings and metals under the coatings when the coatings are used.

Description

technical field [0001] The invention relates to a coating, specifically a solvent-free epoxy anti-corrosion coating which can be used for the protection of steel, aluminum alloy and magnesium alloy and has the function of corrosion repair. Background technique [0002] The loss caused by metal corrosion accounts for more than 4% of the entire GDP. The most common method of anti-corrosion is to coat the metal surface with an anti-corrosion coating to isolate the metal from corrosive media. However, in the process of using the coating, there will always be defects in the coating due to various reasons, such as scratches, scratches, etc. These defects will become the weakest point affecting the performance of the coating, and become the so-called "short plate effect". . [0003] There are many public reports about anti-corrosion coatings. For example, in the Chinese patent document with application number 200810140801.2, a kind of "solvent-free epoxy heavy-duty anti-corrosion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/12C09D5/08
Inventor 邵亚薇张颖君李平解光胜张涛孟国哲
Owner 哈尔滨工程大学船舶装备科技有限公司
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