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Nano graphene oxide modified double-component aqueous epoxy anti-corrosion coating and preparation method thereof

A graphene modification, water-based epoxy technology, applied in the field of coatings, can solve problems such as affecting the health of operators, high relative density of zinc powder, reduced corrosion resistance, etc., to eliminate fire hazards and achieve high mechanical strength of paint films. , the effect of convenient construction

Inactive Publication Date: 2016-03-23
CHANGZHOU NANOMEDIA INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are problems in existing epoxy zinc-rich coatings: 1. Due to the high relative density of zinc powder (7.14), it is easy to sink in epoxy resin; 2. When used as a shop primer, it is easy to produce zinc aerosol, which affects The health of the operators, so it is necessary to develop low-zinc epoxy zinc-rich coatings, but the corrosion resistance of low-zinc epoxy coatings is reduced compared with zinc-rich epoxy coatings
But in the anticorrosion coating described in CN102604533A, the dispersion effect of improving graphene by the addition method of complicated graphene has limitation

Method used

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  • Nano graphene oxide modified double-component aqueous epoxy anti-corrosion coating and preparation method thereof
  • Nano graphene oxide modified double-component aqueous epoxy anti-corrosion coating and preparation method thereof
  • Nano graphene oxide modified double-component aqueous epoxy anti-corrosion coating and preparation method thereof

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Effect test

Embodiment 1

[0025] A nano-graphene oxide modified two-component water-based epoxy anti-corrosion coating, firstly, graphene oxide is prepared into a 20% aqueous solution, and 1% dispersant and 10% bisphenol A water-based epoxy resin emulsion are added at the same time. The dispersant is ground to 1000 mesh particles to obtain graphene oxide pre-dispersed slurry. Below by weight ratio, with graphene oxide pre-dispersed slurry 0.1, bisphenol A type aqueous epoxy resin emulsion 20, zinc phosphate 1, aluminum tripolyphosphate 5, 500 mesh flake zinc powder 70, water-based bentonite 2, mica powder 10 , dispersing agent 0.5, defoaming agent 0.3, anti-settling agent 0.2, stir evenly, disperse at high speed and grind to a fineness of less than 35 microns by grinding equipment to obtain the A component of the graphene oxide modified two-component water-based epoxy anti-corrosion coating . At the same time, 40 parts of the polyamide modified epoxy curing agent is diluted with 60 parts of deionized ...

Embodiment 2

[0027] A nanometer graphene oxide modified two-component water-based epoxy anti-corrosion coating, firstly, graphene oxide is prepared into a 30% aqueous solution, and 2% dispersant and 20% bisphenol F-type water-based epoxy resin emulsion are added at the same time. The dispersant is ground to 500 mesh particles to obtain graphene oxide pre-dispersed slurry. Below by weight ratio, will graphene oxide pre-dispersed slurry 1, bisphenol F type aqueous epoxy resin emulsion 20, zinc phosphate 2, aluminum tripolyphosphate 3, 1000 mesh spherical zinc powder 60, water-based bentonite 1, light calcium carbonate 7. Dispersing agent 0.5, defoaming agent 0.4, and anti-settling agent 0.2 are mixed evenly, dispersed at high speed and ground to a fineness of less than 35 microns by grinding equipment to obtain group A of graphene oxide modified two-component water-based epoxy anti-corrosion coating point. At the same time, 60 parts of polyamide modified epoxy curing agent is diluted with 4...

Embodiment 3

[0029] A nano-graphene oxide modified two-component water-based epoxy anti-corrosion coating. First, graphene oxide is prepared into a 40% aqueous solution, and 1% dispersant and 5% bisphenol F type water-based epoxy resin emulsion are added at the same time. The dispersant is ground to 2000 mesh particles to obtain graphene oxide pre-dispersed slurry. Below by weight ratio, will graphene oxide pre-dispersed slurry 5, bisphenol A type aqueous epoxy resin emulsion 10, aluminum tripolyphosphate 5, 2000 mesh flake zinc powder 70, calcined kaolin 2, mica powder 8, dispersant 0.4 , 0.4 of defoamer, and 0.4 of hydroxycellulose, stir evenly, disperse at high speed and grind to a fineness of less than 35 microns by grinding equipment to obtain component A of the graphene oxide modified two-component waterborne epoxy anti-corrosion coating. At the same time, 60 parts of aliphatic amine modified epoxy curing agent is diluted with 40 parts of deionized water to obtain B component of grap...

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Abstract

The invention relates to a nano graphene oxide modified double-component aqueous epoxy anti-corrosion coating and a preparation method thereof. The preparation method includes the steps of a) modifying the surface of graphene oxide with a dispersing agent and resin to prepare graphene oxide pre-dispersed slurry; b) placing the graphene oxide pre-dispersed slurry into a stirring container according to proportion and then stirring the slurry uniformly; c) adding an aqueous epoxy emulsion, an anti-rust pigment, a filling material, a dispersing agent and an anti-flash-rust agent, performing high-speed dispersion and grinding to obtain a first component A of the graphene oxide modified double-component aqueous epoxy anti-corrosion coating; d) diluting an epoxy curing agent in deionized water to obtain a second component B of the graphene oxide modified double-component aqueous epoxy anti-corrosion coating; and e) mixing the component A and the component B uniformly, curing the mixture for 10 min to 15 days at 10-120 DEG C to obtain the coating. The coating is simple in process, is low in cost, is suitable for large-scale production, maintains excellent properties of epoxy resin, is better in corrosion resistance, anti-seepage property, mechanical performance and anti-wear property, and has wide industrial application prospect.

Description

technical field [0001] The invention relates to coating technology, in particular to a nano-graphene oxide modified two-component waterborne epoxy anti-corrosion coating and a preparation method thereof. Background technique [0002] At present, about 30% of the world's steel is corroded every year, and 10% of the steel is turned into useless rust. The economic loss caused by corrosion is as high as 700 billion US dollars every year. Metal corrosion not only brings economic losses to human beings, but also is not conducive to the protection of natural resources and the environment, and sometimes even endangers personal safety. In order to prevent and slow down corrosion, many anti-corrosion methods have been developed in production practice and scientific experiments. Among them, paint protection is the most convenient and economical, so it has been widely used. [0003] Chinese patent CN1456705 (published on 2003.11.19) discloses a production process of a corrosion-resist...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/10C09D7/12C09D5/18
CPCC09D163/00C08K3/04C08K2201/011C09D5/106C09D5/18C09D7/62C09D7/70
Inventor 姚伟周如鸿
Owner CHANGZHOU NANOMEDIA INC LTD
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