Low-surface-energy organic silicon protective coating and preparation method thereof

A protective coating and low surface energy technology, applied in anti-corrosion coatings, anti-fouling/underwater coatings, coatings, etc., can solve problems affecting the safety of power grid operation, large leakage current, and accelerated corrosion of metal bearing parts and reinforced concrete. To achieve the effect of maintaining the marking specification and overall image, reducing the corrosion rate, excellent hydrophobicity and anti-fouling performance

Inactive Publication Date: 2021-05-07
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for electric concrete structures, in addition to the above functions, the protective coating must also have good water and moisture resistance, so as not to cause excessive leakage current of the facility and accelerate the corrosion of metal bearing parts and reinforced concrete; while the surface of concrete facilities is polluted It may also become a secondary pollution source of live facilities, affecting the safety of power grid operation
However, there are few coatings for the surface protection of electric power concrete structures and good moisture-proof, anti-fouling, anti-graffiti and other properties.

Method used

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  • Low-surface-energy organic silicon protective coating and preparation method thereof
  • Low-surface-energy organic silicon protective coating and preparation method thereof
  • Low-surface-energy organic silicon protective coating and preparation method thereof

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Embodiment 1

[0033] The present embodiment provides a kind of low surface energy organosilicon protective coating, and this coating comprises component A and component B, wherein the mass ratio of component A and component B is A component: B component=7: (2~ 4). The A component is mixed by the following mass percentages: polysiloxane resin 47-50%; vinyltrimethoxysilane 1-3%; tetraethoxysilane 9-10%; xylene 22- 24%; n-butanol 14-16%; curing accelerator 2-3%; defoamer 0.3-0.6%; B component consists of 85-87% tetraethoxysilane; Ethoxysilane; mixed with 3-7% n-Butanol.

[0034] The Si-O-Si bond length of siloxane is longer, the bond angle is larger, and it is easy to rotate. Its steric hindrance to the rotation of the side chain is small, the molecular volume is large and the cohesive energy density is low, which reduces the steric hindrance, making the side chain The free rotation of the base is relatively easy, and it has the characteristics of low glass transition temperature, low surfac...

Embodiment 2

[0038] A kind of preparation method of low surface energy organosilicon protective coating is as follows:

[0039] Weigh 47.5g polysiloxane resin, 23.5g xylene, 15g n-butanol, 1.5g vinyltrimethoxysilane, 9.5g tetraethoxysilane, 0.5g defoamer, 2.5g curing accelerator, add In the dispersing container, disperse at the speed of 500r / min for 25 minutes to form a uniform dispersion; filter and package the slurry prepared above with a 200-mesh filter to obtain component A.

[0040] Weigh 85g of tetraethoxysilane, 10g of triethoxysilane, and 5g of n-butanol into the dispersion container, and disperse at a speed of 500r / min for 30 minutes to form a uniform dispersion; The B component is obtained by filtering and packaging with a filter screen. The distribution ratio of the two groups is used in combination according to the mass ratio of component A: component B = 7:3.

Embodiment 3

[0042] A kind of preparation method of low surface energy organosilicon protective coating is as follows:

[0043]Take by weighing 50g polysiloxane resin, 22g dimethylbenzene, 14g n-butanol, 2g vinyltrimethoxysilane, 9g tetraethoxysilane, 0.4g defoamer, 2g curing accelerator, add in dispersion container, in Disperse at a speed of 800r / min for 20 minutes to form a uniform dispersion; filter and package the slurry prepared above with a 150-mesh filter to obtain component A.

[0044] Weigh 87g of tetraethoxysilane, 9g of triethoxysilane, and 6g of n-butanol into the dispersion container, and disperse at a speed of 300r / min for 35 minutes to form a uniform dispersion; The B component is obtained by filtering and packaging with a filter screen. The distribution ratio of the two groups is used in conjunction with the mass ratio of component A: component B = 7:3.5.

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Abstract

The invention discloses a low-surface-energy organic silicon protective coating and a preparation method thereof, and relates to the technical field of coatings. The low-surface-energy organic silicon protective coating is mainly prepared from polysiloxane, vinyl trimethoxy silane, tetraethoxysilane, dimethylbenzene, n-butyl alcohol and the like. The low-surface-energy coating is suitable for protecting the surface of electric concrete, has a sealing and shielding effect, can effectively prevent corrosive media such as chloride ions, water, oxygen and carbon dioxide from entering the concrete, and has excellent hydrophobicity and dirt retention resistance; and pollution flashover caused by secondary pollution brought to live-line facilities and influence on operation safety of the power grid are avoided.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a low surface energy silicone protective coating and a preparation method thereof. Background technique [0002] In recent years, mass concrete has been widely used in thermal power projects, power transmission and transformation projects, and wind power projects at home and abroad. The common large-volume concrete in power engineering mainly includes steam (combustion) engine floor and foundation of thermal power engineering, boiler and smoke cooling tower foundation, GIS floor of power transmission and transformation project, transformer foundation, large line cap foundation, wind power engineering Fan base, etc. The structural durability of these power concrete is one of the important factors affecting the reliability of the power system. This is because due to the impact of the service environment, the internal structure and materials of the concrete structure will be damag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D5/16C09D5/08
CPCC09D5/08C09D5/1675C09D5/1687C09D183/04C08K5/5419
Inventor 赵耀洪盘思伟钱艺华方鹏飞李媛媛牛莉
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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