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Preparation method of epoxy zinc/graphene heavy-duty anticorrosive coating

A heavy-duty anti-corrosion and epoxy zinc technology, which is applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems that affect the ability of the paint film to resist water penetration, reduce the utilization rate of zinc powder, and difficult to disperse the coating. Good physical shielding effect, improved interfacial compatibility, and low zinc powder content

Active Publication Date: 2019-06-04
SHANGHAI ZHENHUA HEAVY IND CHANGZHOU COATINGS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, both graphene and zinc powder have a large specific surface area, are difficult to disperse directly in the coating, and are prone to agglomeration, which will affect the ability of the paint film to resist water penetration, and the metal zinc near the surface and interface of the coating The powder will be consumed, reducing the utilization rate of zinc powder

Method used

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  • Preparation method of epoxy zinc/graphene heavy-duty anticorrosive coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: Preparation of modified graphene-zinc composite powder

[0027] (1) According to the mass ratio of 1:25, graphene and zinc powder were weighed respectively, added to the ball mill jar successively, and ethanol was added, the ball mill jar was evacuated and filled with nitrogen, and the ball milled under the protection of nitrogen atmosphere for 2h and then discharged to obtain Slurry, the slurry is placed in a vacuum drying oven to dry, and the graphene-zinc composite powder is obtained after drying completely;

[0028] (2) Weigh 5g of graphene-zinc composite powder into a three-necked flask, add 30g of toluene diisocyanate and 80g of isopropanol, ultrasonically disperse for 15min under nitrogen protection, heat to 90°C after dispersion, stir for 1h, and filter with suction , put the filter residue into a vacuum drying oven, and dry it at 50° C. to obtain a modified graphene-zinc composite powder.

[0029] Step 2: Preparation of epoxy zincene heavy-duty anti-co...

Embodiment 2

[0035] Step 1: Preparation of modified graphene-zinc composite powder

[0036] (1) According to the mass ratio of 1:27, graphene and zinc powder were weighed respectively, added to the ball mill jar successively, and ethanol was added, the ball mill jar was evacuated and filled with nitrogen, and the ball mill was discharged for 3 hours under the protection of nitrogen atmosphere to obtain Slurry, the slurry is placed in a vacuum drying oven to dry, and the graphene-zinc composite powder is obtained after drying completely;

[0037] (2) Weigh 7g of graphene-zinc composite powder into a three-necked flask, add 40g of toluene diisocyanate and 100g of isopropanol, ultrasonically disperse for 17min under the protection of nitrogen, heat to 95°C after dispersion, stir for 1.5h, pump Filter to obtain the filter residue, put it in a vacuum drying oven, and dry it at 50° C. to obtain a modified graphene-zinc composite powder.

[0038] Step 2: Preparation of epoxy zincene heavy-duty a...

Embodiment 3

[0044] Step 1: Preparation of modified graphene-zinc composite powder

[0045] (1) According to the mass ratio of 1:30, graphene and zinc powder were weighed respectively, added to the ball mill jar successively, and ethanol was added, the ball mill jar was evacuated and filled with nitrogen, and the ball mill was discharged for 4 hours under the protection of nitrogen atmosphere to obtain Slurry, the slurry is placed in a vacuum drying oven to dry, and the graphene-zinc composite powder is obtained after drying completely;

[0046] (2) Weigh 10g of graphene-zinc composite powder into a three-necked flask, add 50g of toluene diisocyanate and 120g of isopropanol, ultrasonically disperse for 20min under nitrogen protection, heat to 100°C after dispersion, stir for 2h, and filter with suction , put the filter residue into a vacuum drying oven, and dry it at 50° C. to obtain a modified graphene-zinc composite powder.

[0047] Step 2: Preparation of epoxy zincene heavy-duty anti-cor...

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Abstract

The invention discloses a preparation method of an epoxy zinc / graphene heavy-duty anticorrosive coating and belongs to the technical field of coating preparation. Graphene and zinc dust are firstly ground and compounded to obtain a graphene-zinc composite powder, and the surface of the graphene-zinc composite powder is modified by the use of toluene diisocyanate. Agglomeration of graphene and zincdust in resin can be effectively prevented, and dispersity of the composite powder in resin is greatly improved. And then, anticorrosive effect of the graphene composite powder can be fully performed, and corrosion resistance of the epoxy resin coating is enhanced. Epoxy resin, a filter, modified graphene-zinc composite powder and other ingredients are mixed to obtain an ingredient A, a curing agent is used as an ingredient B, and the ingredient A and the ingredient B are mixed to obtain the epoxy zinc / graphene heavy-duty anticorrosive coating. The coating has good flexibility and good corrosion resistance, and salt spray resistance time can reach 3000 h and above.

Description

technical field [0001] The invention belongs to the technical field of paint preparation, and in particular relates to a preparation method of epoxy zincene heavy-duty anti-corrosion paint. Background technique [0002] In recent years, the research on heavy-duty anti-corrosion coatings has been very rapid. On the basis of traditional conventional anti-corrosion coatings, many varieties with excellent performance have been developed. Among them, the commonly used heavy-duty anti-corrosion coating is epoxy zinc-rich coating. Epoxy zinc-rich coating is a heavy-duty anti-corrosion coating with excellent corrosion resistance, which is widely used in the field of metal heavy-duty anti-corrosion. Zinc in epoxy zinc-rich paint is a sacrificial anode, and its content in the paint is usually greater than 70%. However, due to the high content of zinc powder in the coating, the coating is easily porous and the adhesion is reduced, and the zinc-rich coating produces more zinc salts wh...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/10C09D7/61C09D7/62C09D7/63C09D7/65
Inventor 杨敏辉卞庆娅刘政超崔国鹏
Owner SHANGHAI ZHENHUA HEAVY IND CHANGZHOU COATINGS CO LTD
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