Conductive anticorrosive coating

A conductive anti-corrosion and coating technology, used in anti-corrosion coatings, conductive coatings, epoxy resin coatings, etc., can solve the problems of high cost, difficult processing, unstable conductivity, etc., and achieve good alkali resistance and improve salt spray resistance. Effect

Inactive Publication Date: 2019-01-08
安庆市泽烨新材料技术推广服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For metal-type conductive coatings, the commonly used silver-filled type has the disadvantage of high cost, and is prone to migration, resulting in a decrease in the conductivity of the coating and resulting in unstable conductivity.
Copper has the danger of polluting the environment. In addition, the potential difference between copper and the carbon steel material of the grounding grid is large, which may easily cause galvanic corrosion of the grounding grid material, resulting in rapid damage to the grounding grid.
Nickel powder is easy to oxidize, and the electrical conductivity decreases after oxidation.
Conductive coatings filled with metal oxides have poor electrical conductivity
Organic conductive polymer coating is a kind of coating with adjustable conductivity, but it is difficult to process and has poor process performance.
The single nano-carbon type conductive coating has a large amount of filler added, and the nano-carbon is not easy to disperse in the coating, and there is a certain incompatibility with the resin; the pretreatment of the substrate is relatively strict, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of modified graphene comprises the following steps:

[0029] 1) Calculated according to parts by weight, weigh 30 parts of graphene, 8 parts of citric acid, 4 parts of chitosan, 8 parts of conductive carbon black, 1 part of tin chloride and 3 parts of phosphorus oxychloride;

[0030] 2) dissolving citric acid in water to prepare an aqueous solution of citric acid, then adding graphene, and then adding tin chloride for stirring and dispersing to obtain a dispersion;

[0031] 3) Add chitosan and conductive carbon black to the dispersion in step 2), stir and disperse, heat up to 40° C., add phosphorus oxychloride and keep it warm for 60 minutes, then filter and dry the filtrate.

Embodiment 2

[0033] The preparation method of modified graphene comprises the following steps:

[0034] 1) Calculated according to parts by weight, weigh 40 parts of graphene, 16 parts of citric acid, 2 parts of chitosan, 4 parts of conductive carbon black, 3 parts of tin chloride and 6 parts of phosphorus oxychloride;

[0035] 2) dissolving citric acid in water to prepare an aqueous solution of citric acid, then adding graphene, and then adding tin chloride for stirring and dispersing to obtain a dispersion;

[0036] 3) Add chitosan and conductive carbon black to the dispersion in step 2), stir and disperse, then raise the temperature to 60° C., add phosphorus oxychloride and keep it warm for 30 minutes, then filter and dry the filtrate.

Embodiment 3

[0038] A conductive anticorrosion coating, calculated in parts by weight, comprising the following components:

[0039] 70 parts of hydroxyl acrylic resin, 20 parts of epoxy resin, 2 parts of modified graphene of embodiment 1, 6 parts of carbon nanotubes, 1.6 parts of octadecyl dimethyl hydroxyethyl ammonium nitrate, 3 parts of 2-methylimidazole 0.3 parts of preservatives, 0.6 parts of polyether defoamers and 120 parts of acetone. The preservative is a mixture of isothiazolinone and aluminum tripolyphosphate, and the mass ratio of isothiazolinone to aluminum tripolyphosphate is 5:1.

[0040] The preparation method of conductive anticorrosion coating:

[0041] 1) First mix part of the hydroxyl acrylic resin, carbon nanotubes and all the modified graphene evenly, and then use a ball mill to perform ball milling to obtain a dispersion;

[0042] 2) Mix the remaining hydroxyl acrylic resin, epoxy resin, octadecyl dimethyl hydroxyethyl ammonium nitrate and part of acetone, and the...

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PUM

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Abstract

The invention provides conductive anticorrosive coating. The conductive anticorrosive coating comprises the following components in parts by weight: 65-75 parts of hydroxyl acrylic resin, 10-30 partsof epoxy resin, 1-3 parts of modified graphene, 4-8 parts of carbon nanotubes, 0.6-2.4 parts of a dispersing agent, 2-4 parts of a curing agent, 0.1-0.4 part of a preservative, 0.1-1 part of a defoaming agent and 80-160 parts of a solvent, wherein the modified grapheme is prepared mainly from graphene, citric acid, chitosan, conductive carbon black, tin chloride and phosphorus oxychloride; the preservative is a mixture of isothiazolinone and aluminum tripolyphosphate. The conductive anticorrosive coating not only has very good corrosion resistance, but also has improved adhesion.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a conductive anticorrosion coating. Background technique [0002] Conductive coating is a special functional coating developed rapidly with modern science and technology. Conductive coatings are applied to non-conductive base materials by spraying, brushing and coating processes, so that they can conduct current and eliminate accumulated static charges. Coatings The conductivity of the formed coating is generally greater than 10S / m. At present, conductive coatings have been applied in various military and civilian industrial fields such as electronics, electrical appliances, aviation, chemical industry, and printing. [0003] Conductive coatings are generally composed of resins, conductive fillers, additives and solvents. Conductive fillers are an important part of conductive coatings. Commonly used conductive fillers mainly include carbon fillers, metal fillers, me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D163/00C09D5/08C09D5/24
CPCC09D5/08C09D5/24C09D133/00C08L63/00C08K9/04C08K3/042C08K9/08C08K3/04C08K3/041C08K13/06
Inventor 汪泽维
Owner 安庆市泽烨新材料技术推广服务有限公司
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