A kind of graphene fluorine modified epoxy self-layering 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 excellent chemical resistance, excellent electrochemical protection, Effective anti-corrosion protection

Active Publication Date: 2021-07-30
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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  • A kind of graphene fluorine modified epoxy self-layering powder coating and preparation method thereof
  • A kind of graphene fluorine modified epoxy self-layering powder coating and preparation method thereof
  • A kind of graphene fluorine modified epoxy self-layering 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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PUM

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Abstract

The invention discloses a graphene fluorine modified epoxy self-layering powder coating and a preparation method thereof. Relating to the technical field of coatings, powder coatings are made of raw materials comprising the following weights: base materials, fillers, graphene and additives; they have weather resistance, excellent chemical resistance and super anti-corrosion properties. The preparation method is as follows: mix base material, fillers except flaky zinc powder, graphene and additives according to the set ratio, stir evenly, melt extrude, press into continuous flakes, cool, grind, sieve points, and then mixed with flake zinc powder in proportion and bound to obtain powder coating; the present invention prepares powder coating according to a specific process, so that flake zinc powder covers the surface of the coating and forms a coating parallel to the coating. Layer-by-layer overlapping tile structure and directional arrangement further improve shielding and anti-corrosion performance.

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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Patent Type & Authority Patents(China)
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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