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A kind of long-acting anticorrosion graphene modified solvent-free epoxy coating and preparation method thereof

A graphene modification and long-term anti-corrosion technology, which is applied in anti-corrosion coatings, coatings, etc., can solve the problems of low environmental protection and achieve the effect of improving corrosion resistance, high shielding performance, and long-term anti-corrosion performance guarantee

Active Publication Date: 2022-04-29
WUHAN RES INST OF MATERIALS PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention patent with the publication number CN110128943A "A Graphene High-performance Anti-corrosion Coating and Its Preparation Method and Products", uses solvent-based epoxy resin, anti-rust pigments, organic solvents, curing agents and other raw materials to prepare graphene high-performance anti-corrosion coatings , using the characteristics of graphene to enhance the long-term anti-corrosion protection to a certain extent, but the preparation method uses more solvents and catalysts for dispersion reactions, and the environmental protection is not high

Method used

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  • A kind of long-acting anticorrosion graphene modified solvent-free epoxy coating and preparation method thereof
  • A kind of long-acting anticorrosion graphene modified solvent-free epoxy coating and preparation method thereof
  • A kind of long-acting anticorrosion graphene modified solvent-free epoxy coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: Add 1 g of polyurethane-modified graphene microchips into 20 g of solvent-free epoxy resin, and stir for 20 to 60 minutes at 60°C to 80°C to prepare the matrix resin of the coating;

[0047] Step (2) Add 1g of wetting and dispersing agent, 1g of anti-rust pigment, and 1g of thickener to the matrix resin at one time, and use a sand mill to grind at room temperature, with the speed controlled at 1000-2500r / min, and grind for 2-5 hours;

[0048] Step (3) Add 1 g of defoamer in batches during the grinding process, control the dosage to no more than 5% of the total formula, grind until the fineness reaches below 50 μm, and filter and encapsulate with a 200-mesh filter to prepare the coating base material;

[0049]Step (4) Stir and mature the coating base material for 30-40 minutes before coating, and then mix it with 10 g of curing agent according to the above ratio to obtain a long-acting anti-corrosion graphene-modified solvent-free epoxy coating that can be coat...

Embodiment 2

[0054] Example 2: Add 2g of polyurethane-modified graphene microchips into 25g of solvent-free epoxy resin, and stir at 60°C to 80°C for 20 to 60 minutes to prepare the matrix resin of the coating;

[0055] Step (2) Add 2g of wetting and dispersing agent, 1g of anti-rust pigment, and 2g of thickener to the matrix resin at one time, use a sand mill to grind at room temperature, control the speed at 1000-2500r / min, and grind for 2-5 hours;

[0056] Step (3) Add 1 g of defoamer in batches during the grinding process, control the dosage to no more than 5% of the total formula, grind until the fineness reaches below 50 μm, and filter and encapsulate with a 200-mesh filter to prepare the coating base material;

[0057] Step (4) Stir and mature the coating base material for 30-40 minutes before coating, and then mix it with 10 g of curing agent according to the above ratio to obtain a long-acting anti-corrosion graphene-modified solvent-free epoxy coating that can be coated.

[0058]...

Embodiment 3

[0062] Embodiment 3: adding 10 g of polyurethane-modified graphene microchips into 25 g of solvent-free epoxy resin, stirring at 60°C to 80°C for 20 to 60 minutes, to obtain the matrix resin of the coating;

[0063] Step (2) Add 3g of anti-rust pigment and 2g of thickener to the matrix resin at one time, use a sand mill to grind at room temperature, control the speed at 1000-2500r / min, and grind for 2-5 hours;

[0064] Step (3) Add 2 g of defoamer in batches during the grinding process, control the dosage to no more than 5% of the total formula, grind until the fineness reaches below 50 μm, and filter and encapsulate with a 200-mesh filter to prepare the coating base material;

[0065] Step (4) Stir and mature the coating base material for 30-40 minutes before coating, and then mix it with 10 g of curing agent according to the above ratio to obtain a long-acting anti-corrosion graphene-modified solvent-free epoxy coating that can be coated.

[0066] Corresponding performance t...

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Abstract

The invention discloses a long-acting anti-corrosion graphene modified solvent-free epoxy coating and a preparation method thereof. Stir for 20-60 minutes under the condition of ℃~80℃ to prepare the matrix resin of the coating; then add the wetting and dispersing agent, anti-rust pigment and thickener to the matrix resin in proportion, and use a sand mill to grind at room temperature. Control at 1000-2500r / min, grind for 2-5 hours; then add defoamer in batches during the grinding process, control the dosage not to exceed 5% of the total amount of the formula, grind until the fineness reaches below 50μm, and use a filter to filter and package , to prepare the paint base material; before the final coating, the paint base material is stirred and matured for 30-40 minutes, and then mixed with the curing agent according to the above ratio, and then the coating can be carried out. The invention enables uniform orientation distribution of graphene in the coating, and greatly improves the corrosion resistance of the coating.

Description

technical field [0001] The invention belongs to the field of coatings, and relates to a method for modifying epoxy coatings, in particular to a long-acting anti-corrosion graphene modified solvent-free epoxy coating and a preparation method thereof. Background technique [0002] With the increasingly stringent environmental protection policies in our country, the application demand of environmentally friendly long-life protective coatings in industries such as marine engineering equipment, ships, petrochemicals, bridges and major equipment has become increasingly urgent. Commonly used solvent anti-corrosion coatings will be gradually eliminated by the market, and the application of solvent-free coatings will become more and more extensive, among which solvent-free epoxy coatings are one of the most widely used varieties. Solvent-free epoxy coatings have the advantages of strong adhesion, good anti-corrosion performance, and long service life. However, the coating has the di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D187/00C09D5/08C09D5/10C08G83/00
CPCC09D187/005C09D5/08C09D5/084C09D5/106C08G83/001C08K2003/328C08K2003/327C08K2003/2272C08K2003/0893C08K3/32C08K3/40C08K3/22C08K3/08C08K7/00
Inventor 冯增辉汪洋刘兰轩康岩松李冬冬秦卫华吴东恒
Owner WUHAN RES INST OF MATERIALS PROTECTION
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