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Low-surface-energy water-based epoxy anticorrosive coating and preparation and application thereof

A water-based epoxy and anti-corrosion coating technology, applied in anti-corrosion coatings, epoxy resin coatings, anti-fouling/underwater coatings, etc., can solve the problems of unsuitable graphene and difficult polymer uniform dispersion.

Active Publication Date: 2019-10-15
中科广化(重庆)新材料研究院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene without surface treatment is not suitable for polymer composites, because graphene without surface treatment and regular structure tends to agglomerate, and it is difficult to achieve uniform dispersion in the polymer.

Method used

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  • Low-surface-energy water-based epoxy anticorrosive coating and preparation and application thereof
  • Low-surface-energy water-based epoxy anticorrosive coating and preparation and application thereof
  • Low-surface-energy water-based epoxy anticorrosive coating and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] (1) Preparation of inorganic silica fluorine sol:

[0086] Mix 50g of methyltriethoxysilane, 50g of dimethyldiethoxysilane, 100g of dodecafluoroheptylpropyltrimethoxysilane, 150g of absolute ethanol, 40g of deionized water, and 1g of ammonia water at 25 Hydrolysis and polycondensation reaction at ℃ for 24 hours, the nano-hybrid silicon fluoride sol with a solid content of about 51%, that is, inorganic silicon fluoride sol;

[0087] (2) Preparation of graphene oxide modified by a single polyamine compound:

[0088] The graphene oxide (GO) of 1 mass part is dispersed in 90g deionized water by ultrasonic 30min under the condition of power 300W, obtains graphene oxide suspension, then adds in the graphene oxide suspension under the stirring condition of 300rad / min 35 parts by mass of triethylenetetramine, sonicated for 30min, in N 2 Under protection, react at 60°C for 15 hours. After the reaction, add absolute ethanol to the obtained product, remove the supernatant after ...

Embodiment 2

[0094] (1) Preparation of inorganic silica fluorine sol:

[0095] Mix 50g of methyltriethoxysilane, 50g of dimethyldiethoxysilane, 100g of dodecafluoroheptylpropyltrimethoxysilane, 150g of absolute ethanol, 40g of deionized water, and 1g of ammonia water at 25 Hydrolysis and polycondensation reaction at ℃ for 24 hours to obtain a nano-hybrid silicon-fluorine sol with a solid content of about 51%, that is, an inorganic silicon-fluoride sol;

[0096](2) Preparation of graphene oxide modified by a single polyamine compound:

[0097] Graphene oxide (GO) of 1 mass part is dispersed in 92g deionized water under the condition of ultrasonic 30min under the power of 400W, obtains graphene oxide suspension, then adds in the graphene oxide suspension under the stirring condition of 310rad / min 35 parts by mass of triethylenetetramine, sonicated for 30min, in N 2 Under protection, react at 70°C for 15 hours. After the reaction, add absolute ethanol to the obtained product, remove the sup...

Embodiment 3

[0103] (1) Mix 50g methyltriethoxysilane, 50g dimethyldiethoxysilane, 100g dodecafluoroheptylpropyltrimethoxysilane, 150g absolute ethanol, 40g deionized water and 1g ammonia water After hydrolysis and polycondensation reaction at 25°C for 24 hours, a nano-hybrid silicon-fluoride sol with a solid content of about 51%, that is, an inorganic silicon-fluorine sol, was obtained;

[0104] (2) Preparation of graphene oxide modified by a single polyamine compound:

[0105] The graphene oxide (GO) of 1 mass part is dispersed in 95g deionized water by ultrasonic 30min under the condition of power 400W, obtains graphene oxide suspension, then adds in the graphene oxide suspension under the stirring condition of 320rad / min 35 parts by mass of triethylenetetramine, sonicated for 30min, in N 2 Under protection, react at 70°C for 15 hours. After the reaction, add absolute ethanol to the obtained product, remove the supernatant after standing, filter the lower precipitate with filter paper,...

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Abstract

The invention discloses a low-surface-energy water-based epoxy anticorrosive coating and preparation and application thereof. The molecular structure of the coating contains structures such as epoxy groups, polyether, silicon fluoride and graphene; in the stage of emulsifying epoxy resin of the coating, the coating has excellent aqueous property and high emulsifying capability owing to a self-emulsifying aqueous epoxy curing agent, the coating has good compatibility with the epoxy resin, and the stability of emulsion is improved. In a curing stage of modification of a graphene oxide modified coating, it is ensured that the self-emulsifying water-based epoxy curing agent does not separate out from a coating layer to form a stable coating layer; a flexible micro-region is formed by flexiblelong-chain polyether in the coating layer, so that the mechanical property of a coating film is improved; by silicon-fluorine sol, the surface energy of the coating film is reduced; graphene is grafted into the molecular structure through chemical bonds, after the dispersion performance is improved, the graphene can cover a metal surface efficiently, and the corrosion resistance of the coating layer is improved. Therefore, the coating provided by the invention has excellent properties of adhesion, hardness, acid and alkali resistance, water resistance and the like after film formation, variouscomponents are compatible well, and the coating can be used for metal parts and the like.

Description

technical field [0001] The invention belongs to the field of polymer coatings, in particular to a low surface energy waterborne epoxy anticorrosion coating and its preparation and application. Background technique [0002] The excellent physical, mechanical and electrical insulation properties of epoxy resin, the bonding performance with various materials, and the flexibility of its use process are not available in other thermoplastic resins, so the coatings made of it have won great popularity in the field of national economy widely used. However, most epoxy resins are insoluble in water, and only soluble in organic solvents such as aromatic hydrocarbons and ketones. Therefore, during operation, organic solvents are often added to improve operating performance. However, organic solvents are flammable, explosive, toxic, and pollute the environment, which brings a lot of inconvenience to storage, transportation and construction, and also has a certain poisonous effect on ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D5/16C09D7/61C09D7/62C09D7/20C08G59/64
CPCC08G59/64C09D5/08C09D5/1618C09D5/1687C09D163/00C09D7/20C08K3/36C08K9/04C08K3/042C08K3/346C08K13/06
Inventor 刘伟区王硕梁利岩
Owner 中科广化(重庆)新材料研究院有限公司
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