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Graphene fluorine-modified epoxy self-stratifying powder coating and preparation method thereof

A powder coating and graphene technology, applied in the field of coatings, can solve the problems of poor adhesion and impact resistance, no heavy anti-corrosion performance, limited addition amount, etc., to achieve strong adhesion, good electrochemical protection, and low price. Effect

Active Publication Date: 2020-05-19
AVIC BIAM NEW MATERIALS TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited amount of fillers added in powder coatings, its excellent shielding properties are often used as the main means of protecting steel substrates. Even if zinc powder is added, it cannot form a conductive path like solvent-based zinc-rich coatings and play the role of cathodic protection. effect
Fluorocarbon powder coatings have good weather resistance due to the presence of C-F bonds, but when used alone, their adhesion and impact resistance are worse than other powder coatings, and they do not have heavy-duty anti-corrosion properties
If the two-layer powder coating of fluorocarbon system and epoxy system is used together and sprayed separately, repeated construction is required, the process is complicated, and the cost is high. Therefore, in order to further achieve the new industrial orientation of green production, energy saving and emission reduction, a self-separation Layers of Heavy Duty Powder Coating

Method used

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  • Graphene fluorine-modified epoxy self-stratifying powder coating and preparation method thereof
  • Graphene fluorine-modified epoxy self-stratifying powder coating and preparation method thereof
  • Graphene fluorine-modified epoxy self-stratifying powder coating and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A kind of preparation technology of graphene fluorine modified epoxy self-layering powder coating, comprises the steps:

[0056] S1, 20kg phenolic epoxy powder resin, 10kg fluorocarbon powder resin, 20kg modified bisphenol A epoxy resin, 5kg polyurethane resin, 5kg aliphatic blocked polyisocyanate, 40kg spherical zinc powder, 5.4kg graphene, 4.5 Add kg dimethylpolysiloxane and 4.5 kg 2-mercaptobenzothiazole into the high-speed mixer, stir for 3 minutes to obtain a uniform mixture;

[0057] S2. Melting and extruding the homogeneous mixture at a temperature of 115° C. to obtain a mixture in a hot melt state;

[0058] S3, pressing the hot-melt mixture into continuous flakes, cooling to normal temperature, and then crushing into small flakes with an average length of 1.5 mm, grinding them into powder, and passing through a 180-mesh sieve to obtain a mixed powder;

[0059] S4. Mix the mixed powder with 80kg flake zinc powder, and bind for 60min at a binding temperature of 7...

Embodiment 2

[0061] A kind of preparation technology of graphene fluorine modified epoxy self-layering powder coating, comprises the steps:

[0062] S1, 20kg phenolic epoxy powder resin, 10kg fluorocarbon powder resin, 20kg modified bisphenol A epoxy resin, 5kg polyurethane resin, 5kg aliphatic blocked polyisocyanate, 20kg spherical zinc powder, 2.7kg graphene, 2.25 Add kg dimethyl polysiloxane and 2.25 kg 2-mercaptobenzothiazole into the high-speed mixer, stir for 3 minutes to obtain a uniform mixture;

[0063] S2. Melting and extruding the homogeneous mixture at a temperature of 115° C. to obtain a mixture in a hot melt state;

[0064] S3, pressing the hot-melt mixture into continuous flakes, cooling to normal temperature, and then crushing into small flakes with an average length of 1.5 mm, grinding them into powder, and passing through a 180-mesh sieve to obtain a mixed powder;

[0065] S4. Mix the mixed powder with 40kg flake zinc powder, and bind for 60min at a binding temperature o...

Embodiment 3

[0067] A kind of preparation technology of graphene fluorine modified epoxy self-layering powder coating, comprises the steps:

[0068] S1, 40kg phenolic epoxy powder resin, 30kg fluorocarbon powder resin, 40kg modified bisphenol A epoxy resin, 15kg polyurethane resin, 15kg aliphatic blocked polyisocyanate, 20kg spherical zinc powder, 5.1kg graphene, 5kg Add dimethylpolysiloxane and 5kg 2-mercaptobenzothiazole into the high-speed mixer, stir for 3min, and obtain a uniform mixture;

[0069] S2. Melting and extruding the homogeneous mixture at a temperature of 115° C. to obtain a mixture in a hot melt state;

[0070] S3, pressing the hot-melt mixture into continuous flakes, cooling to normal temperature, and then crushing into small flakes with an average length of 1.5 mm, grinding them into powder, and passing through a 180-mesh sieve to obtain a mixed powder;

[0071] S4. Mix the mixed powder with 40kg flake zinc powder, and bind for 60min at a binding temperature of 70°C and...

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Abstract

The invention discloses a graphene fluorine-modified epoxy self-stratifying powder coating and a preparation method thereof, and belongs to the technical field of coatings. The powder coating is prepared from, by weight, a base material, a filler, graphene and an auxiliary agent. The graphene fluorine-modified epoxy self-stratifying powder coatinghas the advantages of weather resistance, excellentchemical resistance and superstrong corrosion resistance. The preparation method comprises the following steps: mixing the base material, the filler exceptflaky zinc powder,graphene and the auxiliaryagent according to a set ratio, uniformly stirring, carrying out melt extrusion, pressing into continuous flakes, cooling, grinding into powder, screening, mixing withflaky zinc powder according to aratio, and binding to obtain the powder coating. The powder coating is prepared according to a specific process, so that the flaky zinc powder is adopted to cover the surface of acoating layer, a layer-by-layer lap joint type tile structure parallel to the coating layer is formed, directional arrangement is achieved, and the shielding property and the corrosion resistance are further improved.

Description

technical field [0001] The invention relates to the technical field of coatings, more specifically, it relates to a graphene fluorine modified epoxy self-layering powder coating and a preparation method thereof. Background technique [0002] Steel structure is a structure composed of steel materials. It is mainly composed of beam steel, steel column, steel truss and other components made of section steel and steel plate. It is widely used in large factories, venues, super high-rises and other fields. With the application of steel structures more and more widely, the anticorrosion of steel structures is becoming more and more important. There are many kinds of traditional steel structure anticorrosion methods, mainly hot-dip galvanizing, thermal spraying zinc, powder spraying, and solvent-based organic zinc-rich coatings. However, hot-dip galvanizing and hot-spraying galvanizing are known for their high pollution and high energy consumption. Similarly, solvent-based coatings ...

Claims

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Application Information

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IPC IPC(8): C09D163/04C09D163/00C09D175/04C09D127/12C09D5/03C09D5/10
CPCC08K2003/0893C08K2003/321C08K2201/014C08L2205/02C08L2205/035C09D5/033C09D5/106C09D127/12C09D163/00C09D163/04C08L63/00C08L75/04C08L27/12C08K13/04C08K7/00C08K3/08C08K3/042C08K7/18C08K5/47C08L63/04C08K13/06C08K3/34C08K3/32
Inventor 吴美汝高婷屈帅李猛杨振波
Owner AVIC BIAM NEW MATERIALS TECH ENG
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