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Anticorrosive coating with barrier property

A technology of anti-corrosion coatings and barrier properties, applied in anti-corrosion coatings, coatings, etc., can solve the problems of limited application range of anti-corrosion ability, increased difficulty of spraying technology, and insufficient barrier performance, so as to achieve good compatibility and dispersion, Improved surface hydrophobicity and improved anti-corrosion performance

Active Publication Date: 2019-05-17
芜湖万隆新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the most widely used anti-corrosion coatings on the surface of steel equipment are epoxy systems and polyurethane systems. The anti-corrosion coating consists of three parts: anti-corrosion primer, intermediate coating and top coat. However, due to the combination of multi-layer coatings, the spraying technology The difficulty increases, the spraying process is complicated, and the anti-corrosion performance decreases significantly with the increase of the ambient temperature
Polyaryl ether sulfone ultrafine powder is a special engineering coating, but its barrier performance is not good enough after film formation, which limits its application range due to its limited anti-corrosion ability.

Method used

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preparation example Construction

[0026] The two-dimensional ultrathin nano-TiO 2 The preparation method of sheet, comprising:

[0027] Under the protection of nitrogen, add titanium tetrachloride to ethylene glycol, heat to reflux, and then add water to react. After the reaction, cool down to room temperature, centrifuge and wash to obtain two-dimensional ultra-thin nano-TiO 2 sheet; the reaction time is preferably 30min-5h; more preferably 2-4h, the volume ratio of ethylene glycol and titanium tetrachloride is preferably (5-100): 1, more preferably (5- 6): 1, the volume ratio of titanium tetrachloride to water is preferably (1-4): 1, more preferably (1-1.25): 1; the ethylene glycol is used as a directing agent;

[0028] According to the present invention, the defoamer is preferably one or both of BYK 057, EL2600, and EL2609; the leveling agent is preferably one or both of BYK306, EL2503, and EL2537; the The dispersant is preferably one or both of BYK110, EL2310, and EL2311; the adhesion promoter is prefera...

Embodiment 1

[0032] Under the protection of nitrogen, add 0.5L titanium tetrachloride to 3.0L ethylene glycol, heat to reflux, add 0.5L water to react with titanium tetrachloride, react for 2.0h, cool down to room temperature, and perform centrifugation and washing. Two-dimensional ultrathin nano-TiO 2 Sheets (two-dimensional nano-TiO 2 The sheet thickness is 20nm, and the nanosheet is broadened by 200nm). Dissolve 90 parts of polyarylethersulfone coating (viscosity of 0.84Pa·s) in DMAC, and keep stirring to form a homogeneous solution with a solid content of 50%, two-dimensional nano-TiO 2 Add 2 parts of silane coupling agent KH550 to 6 parts of the sheet and react at 70°C for 4 hours. After wet surface modification (modified two-dimensional nano-TiO 2 The sheet thickness is 20nm, the nanosheet width is 200nm), dispersed in DMAC, ultrasonically dispersed, the above two solutions are mixed and stirred evenly at high speed, and the leveling agent BYK306: 0.5 parts, the dispersant BYK110: ...

Embodiment 2

[0036] Under the protection of nitrogen, add 0.5L titanium tetrachloride to 3.0L ethylene glycol, heat to reflux, add 0.5L water to react with titanium tetrachloride, react for 2.0h, cool down to room temperature, and perform centrifugation and washing. Two-dimensional ultrathin nano-TiO2 Sheets (two-dimensional nano-TiO 2 The sheet thickness is 20nm, and the nanosheet is broadened by 200nm).

[0037] Dissolve 80 parts of polyarylethersulfone coating (viscosity: 0.84Pa·s) in DMAC, and keep stirring to form a homogeneous solution with a solid content of 50%, two-dimensional nano-TiO 2 Add 6 parts of silane coupling agent KH550 to 12 parts of the sheet and react at 70 °C for 4 hours. After wet surface modification (modified two-dimensional nano-TiO 2 Thickness of sheet is 20nm, width of nanosheet is 200nm), dispersed in DMAC, ultrasonically dispersed, mix the above two solutions and stir evenly at high speed, add leveling agent EL2503: 0.5 part, dispersant EL2310: 0.1 part, fil...

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Abstract

The invention provides anticorrosive coating with a barrier property and belongs to the field of waterborne coating. The anticorrosive coating is prepared from the following components in parts by weight: 60 to 90 parts of poly(aromatic ether sulfone) coating, 1 to 20 parts of a modified two-dimensional nano-TiO2 sheet layer, 0.2 to 3 parts of a flatting agent, 0.1 to 2 parts of a dispersant, 0.5to 5 parts of a film-forming auxiliary agent, 0.1 to 2 parts of a de-foaming agent and 0.5 to 2 parts of an adhesion promoter. The modified two-dimensional ultra-thin nano-TiO2 sheet layer is obtainedby adding two-dimensional ultra-thin nano-TiO2 sheet layer into a silane coupling agent and carrying out surface modification; the thickness of the modified two-dimensional ultra-thin nano-TiO2 sheetlayer is 10 to 50 nm and the spreading width of a nano-sheet is 100 to 500 nm. The anticorrosive coating provided by the invention has good barrier property.

Description

technical field [0001] The invention belongs to the field of water-based coatings, in particular to a barrier anticorrosion coating. Background technique [0002] With the advancement of science and technology, the process of modern industrialization is accelerating, and the corrosion problem is becoming more and more serious. Corrosion pervades all sectors of the national economy, bringing huge losses to the national economy, such as severe corrosion of mechanical parts, and the loss of steel equipment and metal parts scrapped due to corrosion every year reaches 30% of the annual output. The economic loss caused by corrosion accounts for more than 2% of the country's gross national product every year. The huge harm of corrosion is not only manifested in economic losses, but also brings huge waste of resources, aggravates environmental pollution, casualties and hinders the development of new technologies. Therefore, anti-corrosion is getting more and more attention from all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D181/06C09D5/08C09D7/62
Inventor 周光远李璐姜国伟
Owner 芜湖万隆新材料有限公司
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