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Temporary steel protective coating and preparation method thereof

A temporary protection and coating technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve problems such as slow corrosion, potential safety hazards in buildings, and increased costs

Inactive Publication Date: 2019-06-14
中昊北方涂料工业研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under harsh conditions, steel corrosion is serious, resulting in huge waste and economic losses
At the same time, due to the corrosion of steel, it may have defects, so that the building may have potential safety hazards
There is slow corrosion of steel bars after cement pouring, resulting in a reduction in the service life of the building
[0003] Construction steel such as rebar is rarely protected, one reason is that the cost is too high
Second, the existing coating cannot meet the continuous anti-corrosion requirements after construction, and if it is not disposed of, there may be new safety hazards (the service life of ordinary anti-corrosion coatings generally does not exceed 5 years and does not match the life of the building.
At the same time, steel bars have mechanical requirements in buildings, and ordinary anti-corrosion coatings are difficult to meet), thus increasing the cost

Method used

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  • Temporary steel protective coating and preparation method thereof
  • Temporary steel protective coating and preparation method thereof
  • Temporary steel protective coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A temporary protective coating for steel, which is composed of the following components in weight percent: 20% ethyl orthosilicate, 3% methyltrimethoxysilane, 35% water, 0.01% acid catalyst, 36.99% hexanediol, silane Coupling agent 5%. Wherein the acid catalyst is a mixed solution of hydrochloric acid and acetic acid in a volume ratio of 1:1, and the silane coupling agent is 3-aminopropyltriethoxysilane and 3-glycidyloxypropyltrimethoxysilane in a mass ratio of 1 :2 Mixed mixture.

[0016] During the preparation of the steel temporary protective coating, mix ethyl orthosilicate, methyltrimethoxysilane, hexanediol, and silane coupling agent in the reactor, then add water and acidic catalyst into the reactor, and mix well , without layering and standing still for a week, a temporary protective coating for steel can be prepared.

[0017] After drying the samples at room temperature for 7 days, the test performance is as follows:

[0018]

Embodiment 2

[0020] A temporary protective coating for iron and steel, which is composed of the following components in weight percentage: 10% ethyl orthosilicate, 8% methyltriethoxysilane, 50% water, 0.001% acid catalyst, 30.999% ethanol, silane Joint agent 1%. Wherein the acid catalyst is a mixed solution of hydrochloric acid and acetic acid in a volume ratio of 1:1, and the silane coupling agent is 3-aminopropyltriethoxysilane and 3-glycidyloxypropyltrimethoxysilane in a mass ratio of 1 :1 Mixed mixture.

[0021] During the preparation of the steel temporary protective paint, ethyl orthosilicate, methyltriethoxysilane, ethanol, and silane coupling agent are mixed in the reactor, and then water and an acidic catalyst are added to the reactor and mixed evenly. Temporary protective coatings for steel can be prepared without delamination and standing still for a week.

[0022] After drying the samples at room temperature for 7 days, the test performance is as follows:

[0023]

Embodiment 3

[0025] A temporary protective coating for iron and steel, which is composed of the following components in weight percentage: 15% orthoethyl silicate, 5% vinyltriethoxysilane, 40% water, 0.005% acid catalyst, 36.995% methanol, silane Joint agent 3%. Wherein the acid catalyst is a mixed solution of hydrochloric acid and acetic acid in a volume ratio of 1:1, and the silane coupling agent is 3-aminopropyltriethoxysilane and 3-glycidyloxypropyltrimethoxysilane in a mass ratio of 1 :2 Mixed mixture.

[0026] During the preparation of the steel temporary protective paint, tetraethyl orthosilicate, vinyltriethoxysilane, methanol and silane coupling agent are mixed in the reactor, and then water and acidic catalyst are added to the reactor and mixed evenly. Temporary protective coatings for steel can be prepared without delamination and standing still for a week.

[0027] After drying the samples at room temperature for 7 days, the test performance is as follows:

[0028]

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PUM

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Abstract

The invention discloses a temporary steel protective coating. The temporary steel protective coating comprises the following components in percentage by weight: 10-20% of tetraethoxysilane, 3-8% of silane monomer, 35-50% of water, 0.001-0.01% of acidic catalyst, 30-40% of mixed solvent and 1-5% of silane coupling agent. According to the invention, during coating synthesis, tetraethoxysilane, a silane monomer, a mixed solvent, water and an acidic catalyst are subjected to a sol-gel method, thus an organic-inorganic composite material is prepared through self-assembly and is of a three-dimensional mesh structure. A large number of hydroxyl groups are contained in the structure, thus the organic-inorganic composite material can be well combined with chemical bonds on the surface of steel. Thestructure contains one or more organic groups such as methyl capable of exerting hydrophobic effect, thus a base material is separated from water vapor and protection efficacy is achieved. Meanwhile,due to the organic-inorganic hybrid property of the material, the material is excellent in combination with silicates, the material can be used for temporary protection in an early stage of use by building steel and lasting protection after use by the building steel, and the performance of the material is superior to that of a method for spraying a layer of silane coupling agent diluent on the surface of the base material.

Description

technical field [0001] The invention relates to a paint, in particular to a steel temporary protective paint and a preparation method thereof. Background technique [0002] Rebar, which is the most used steel in construction, is rarely protected, and the storage period before use is generally 1-3 months. Under harsh conditions, steel corrosion is serious, resulting in huge waste and economic losses. At the same time, due to the corrosion of steel, it may have defects, so that the building may have potential safety hazards. The steel bars corrode slowly after pouring the cement, resulting in a reduction in the service life of the building. [0003] Construction steel, such as rebar, is rarely protected. One reason is that the cost is too high. The second is that the existing coatings cannot meet the continuous anti-corrosion requirements after construction, and there may be new safety hazards if they are not disposed of (the service life of ordinary anti-corrosion coatings...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D5/08C08G77/08C08G77/06
Inventor 胡进奔李博文谈珍吴津成
Owner 中昊北方涂料工业研究设计院有限公司
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