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Modified silicate waterborne zinc-rich anticorrosive coating employing organic montmorillonite as anti-settling dispersant

An organic montmorillonite, anti-corrosion coating technology, applied in anti-corrosion coatings, coatings and other directions, can solve the problems of uneven gloss of zinc-based coatings, reduced corrosion resistance, easy to agglomerate, etc., to achieve excellent adhesion, The effect of fineness improvement and improved protective performance

Inactive Publication Date: 2014-04-30
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, when zinc powder is directly used in water-based inorganic zinc-rich coatings, there are problems such as difficult wetting and dispersion, easy agglomeration and precipitation, resulting in uneven gloss of zinc-based coatings, uneven surface, and reduced corrosion resistance. solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Weigh 17.4g of flaky zinc powder according to the formula ratio to obtain component A. The flaky zinc powder is superfine zinc powder, the effective zinc content of zinc powder is 96%, and the fineness is 500 mesh;

[0030] 2) Preparation of potassium silicate solution modified by silicon-acrylic emulsion: Weigh silica sol, potassium hydroxide and water with a mass ratio of 11.27:1:7.63, add silica sol to a constant temperature container with an electric stirrer, and At a constant temperature of 70°C, slowly add potassium hydroxide and water into the reaction container while stirring, and stir the mixed solution for 10 minutes to obtain a potassium silicate solution. Weigh the potassium silicate solution into a constant temperature container, , while stirring, a certain proportion of silicon-acrylic emulsion will be added, and after electric stirring for 40 minutes, the modified base material will be obtained. 2 :K 2 O is 5.5;

[0031] 3) Weigh 52g of emulsion-modi...

Embodiment 2

[0040] 1) Weigh 19.7g of zinc powder according to the formula ratio to obtain component A. The flaky zinc powder is ultrafine zinc powder, the effective zinc content of zinc powder is 96%, and the fineness is 500 mesh;

[0041] 2) Preparation of potassium silicate solution modified by silicon-acrylic emulsion: Weigh silica sol, potassium hydroxide and water with a mass ratio of 11.27:1:7.63, add silica sol to a constant temperature container with an electric stirrer, and At a constant temperature of 70°C, slowly add potassium hydroxide and water into the reaction vessel while stirring, and stir the mixed solution for about 10 minutes to obtain a potassium silicate solution. Next, while stirring, a certain proportion of silicon-acrylic emulsion will be added, and after electric stirring for 40 minutes, the modified base material will be obtained, wherein the mass fraction of silicon-acrylic emulsion is controlled to be 20%, and the molar ratio of silicon to potassium to SiO 2 :...

Embodiment 3

[0049] 1) Weigh 20g of zinc powder according to the formula ratio to obtain component A. The flaky zinc powder is superfine zinc powder, the effective zinc content of zinc powder is 97%, and the fineness is 500 mesh;

[0050] 2) Preparation of potassium silicate solution modified by silicon-acrylic emulsion: Weigh silica sol, potassium hydroxide and water with a mass ratio of 4.12:1:7.63, add silica sol to a constant temperature container with an electric stirrer, and At a constant temperature of 70°C, slowly add potassium hydroxide and water into the reaction vessel while stirring, and stir the mixed solution for about 10 minutes to obtain a potassium silicate solution. Next, while stirring, a certain proportion of silicon-acrylic emulsion will be added, and after electric stirring for 40 minutes, the modified base material will be obtained, wherein the mass fraction of silicon-acrylic emulsion is controlled to be 20%, and the molar ratio of silicon to potassium to SiO 2 :K ...

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Abstract

The invention relates to an anticorrosive coating, and particularly relates to a modified silicate waterborne zinc-rich anticorrosive coating employing organic montmorillonite as an anti-settling dispersant. The modified silicate waterborne zinc-rich anticorrosive coating is prepared from components A and B, wherein the component A is prepared from 10-60% of flake zinc powder; the component B is prepared from 25-85% of silicone acrylic emulsion-modified potassium silicate solution, 0.1-5% of ricinate, 0.1-5% of organic montmorillonite, 0.1-5% of defoamer, and 0.01-2% of thickener, and the percent is weight percent. The modified silicate waterborne zinc-rich anticorrosive coating has the advantages that the dosage of zinc powder can be greatly reduced, and the cost of the coating is reduced. The water resistance of the coating is improved by the organic emulsion-modified potassium silicate solution; excellent painting hardness of the coating is achieved, the barrier property of the coating is improved, and meanwhile, the anticorrosive coating is almost zero in volatile organic compound (VOC) release property, and free of environmental pollution.

Description

technical field [0001] The invention relates to an anti-corrosion coating, in particular to a modified silicate water-based zinc-rich anti-corrosion coating in which organic montmorillonite is used as an anti-sedimentation dispersant. Background technique [0002] Metal corrosion will cause huge economic losses. At present, my country's steel output has reached 100 million tons, of which 30% is wasted due to corrosion. According to statistics, the economic loss caused by corrosion reaches 700 billion U.S. dollars every year, exceeding natural disasters such as earthquakes and floods. Therefore, the protection of metal corrosion is imminent. The protection of metal corrosion is mainly achieved through anti-corrosion coatings. It is widely used because of its simple coating technology, convenient operation, low price and long protection time. Traditional solvent-based anti-corrosion coatings will emit a large amount of VOC, which is a potential threat to people's living envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/10C09D7/12
Inventor 齐杉李三喜周春婧
Owner SHENYANG POLYTECHNIC UNIV
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