Preparation method of compound waterborne anticorrosive coating

A water-based technology for anti-corrosion coatings, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of reduced strength, decreased anti-corrosion performance, poor barrier properties, etc., to promote metal corrosion, intensify corrosion, and high porosity rate effect

Active Publication Date: 2018-01-12
吉林省顺风环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water-based epoxy resins also have certain defects in practical applications, such as the decrease of anti-corrosion performance, poor barrier properties, and reduced strength due to the micropores brought about by water-based curing. Therefore, it is urgent to develop a water-based epoxy resin with superior performance. Anti-corrosion coating

Method used

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  • Preparation method of compound waterborne anticorrosive coating
  • Preparation method of compound waterborne anticorrosive coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of composite water-based anticorrosion coating comprises the following steps.

[0022] 1. Preparation of conductive filler.

[0023] (1) Weigh 8g of aniline hydrochloride into a three-neck flask, add 40mL of deionized water, stir for 40min at a stirring speed of 500 r / min to obtain solution I; weigh 13g of ammonium persulfate into a beaker, add 60mL of deionized In water, stir for 40 min at a stirring speed of 500 r / min to obtain solution II; place solution I and solution II in an ice-water bath for 40 min to lower the temperature to 10°C; then add solution II to the solution at a rate of 5 mL / s In I, stir rapidly and vigorously for 2min at a stirring speed of 1500r / min to obtain solution III; leave solution III at room temperature for 15h to obtain polyaniline hydrogel, and use 500mL of 0.2 mol / Wash with 1 L HCl, replace HCl every 10h, and wash for 6 days; then use 500mL absolute ethanol for solvent replacement, replace absolute ethanol every 1...

Embodiment 2

[0032] The preparation method of the water-based anticorrosion coating without adding any filler comprises the following steps.

[0033] (1) Mix 100 parts of Ar555 water-based epoxy resin and 100 parts of water evenly to obtain a resin system.

[0034] (2) Mix 50 parts of H228B water-based curing agent with 100 parts of water evenly; mix the resin system and the diluted water-based curing agent in a weight ratio of 4:1 to get the product.

[0035] Coat the obtained anti-corrosion coating on the treated metal substrate, control the thickness at 30-200um, and cure at room temperature for 24 hours.

Embodiment 3

[0037] The preparation method of the water-based anti-corrosion paint added with conductive metal organic framework includes the following steps.

[0038] 1. Preparation of conductive filler.

[0039] (1) Weigh 0.2mL of titanium tetrachloride and dissolve it in 70mL of cold water, add 0.3g of the metal-organic framework (MIL-101(Cr)) prepared in Example 1, stir for 30min at a stirring speed of 300r / min, and stir After centrifugation for 5 minutes, the centrifugal speed is 3000r / min, remove the precipitate obtained from the supernatant and add 100mL deionized water, then transfer to the reaction kettle, hydrothermal reaction at 160°C for 8h; then centrifugal washing, the centrifugal speed is 3000r / min, and the precipitate was dried under vacuum at 40°C for 10 h to obtain a conductive metal-organic bone (MIL-101(Cr)@TiO 2 ).

[0040] 2. Preparation of anti-corrosion coatings.

[0041] (1) Take 100 parts of Ar555 water-based epoxy resin and 100 parts of water, and mix them ev...

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Abstract

The invention belongs to the field of chemical engineering coatings and particularly relates to a preparation method of a compound waterborne anticorrosive coating. According to the preparation method, polyaniline aerogel (PA) and a conductive metal organic skeleton (MIL-101(Cr)@TiO2) are taken as fillers and are added into waterborne epoxy resin so as to prepare the waterborne anticorrosive coating. The polyaniline aerogel and the conductive metal organic skeleton are taken as the anticorrosive fillers, so that the mutual synergetic transfer of electrons can be realized, corrosion reaction occurs above a coating layer but not the metal surface, further a metal anode is protected, and an anticorrosion effect is achieved; by virtue of multi-duct structures of the polyaniline aerogel and theconductive metal organic skeleton, the time for corrosion particles to reach the metal surface is commonly delayed, the waterborne epoxy resin has anticorrosive capability, and meanwhile, the barrierproperty of the waterborne epoxy resin is added, so that the anticorrosive performance of an anticorrosive coating layer is remarkably improved.

Description

technical field [0001] The invention belongs to the field of chemical coatings, in particular to a preparation method of a composite water-based anticorrosion coating. Background technique [0002] At present, solvent-based anti-corrosion coatings are mostly used in metal anti-corrosion, such as TY3318 and TY3319 whose main components are phenolic modified epoxy resins. Since different resins have their own unique properties, different resins can be selected according to different use environments during construction. In organic solvents, such as polyurethane has excellent weather resistance and chemical resistance, high gloss, abrasion resistance, silicone resin has excellent heat resistance and can be used as a base material for heat-resistant and weather-resistant coatings, etc., while solvent-based coatings The proportion of solvents can be controlled with the change of location and climate to obtain high-quality coating films; however, a large amount of highly volatile ...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D179/02C09D187/00C09D5/08
Inventor 朱进军王杨松付琬璐葛晶李迎旭柴立强
Owner 吉林省顺风环保材料有限公司
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