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Two-component waterborne epoxy carbon-based coating and preparation method thereof

An epoxy carbon-based, two-component technology, applied in the field of coatings, can solve problems such as poor adhesion, no obvious improvement in coating adhesion, and coating peeling, to achieve the best adhesion effect, improve excessive viscosity, The effect of anti-corrosion performance improvement

Inactive Publication Date: 2020-12-25
宜兴市华夏化工材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the invention patent application with the application number CN 107312457A discloses "water-based two-component coal tar pitch anti-corrosion coating and its preparation method". function to improve the anti-corrosion performance of the coating, but this application uses an acid anhydride curing agent, which must be heated to slowly cure when curing, and the acid anhydride cannot directly react with the epoxy group, so the process is complicated; and The emulsified asphalt added in this application will increase the viscosity of the coating. Although the adhesion has been improved, the leveling property of the coating is poor during use and the curing time is long; , January 2016, Volume 31 No. 01, China Paint), discloses a method for preparing a water-based iron brown primer for railway wagons, which utilizes the interaction between water-based amine polymers and water-based epoxy emulsions Preparation of water-based iron brown primer, but there is no emulsified asphalt component in this scheme, and the adhesion of the prepared coating has not been significantly improved
In the process of spraying, due to the poor adhesion of the primer to the surface of the metal, the paint sprayed later will all fall off from the primer, and further spraying will cause waste of paint and increase the cost

Method used

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  • Two-component waterborne epoxy carbon-based coating and preparation method thereof
  • Two-component waterborne epoxy carbon-based coating and preparation method thereof

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preparation example Construction

[0044] Another aspect of the present application provides the preparation method of two-component waterborne epoxy carbon-based paint, comprising the following steps:

[0045] (1) Take emulsified asphalt, add epoxy resin, coumarone resin, and carbon material, stir for 20-30 minutes, and then disperse at 600-800rpm for 10-30 minutes to obtain mixed emulsified asphalt;

[0046] (2) Fully sand the filler, add it to the mixed emulsified asphalt, and then continue to disperse at 600-800rpm for 10-20 minutes;

[0047] (3) Add wetting agent, defoamer, leveling agent, anti-sedimentation agent and deionized water to step (2), mix with deionized water, and disperse at 500-600rpm for 50-60 minutes to obtain component A;

[0048] (4) Add component B epoxy curing agent to component A, stir and mix to obtain a uniform paint, which is a two-component water-based epoxy carbon-based coating.

[0049] It should be noted that the two-component waterborne epoxy carbon-based coating is mixed with...

Embodiment 1

[0060] A two-component waterborne epoxy carbon-based coating, the preparation raw materials include component A and component B; by weight, the raw materials of component A include: 10 parts of emulsified asphalt, 30 parts of epoxy resin, coumarone resin 5 parts, 1 part of carbon material graphene, 15 parts of filler (respectively: 2 parts of iron red, 3 parts of mica powder, 5 parts of precipitated barium sulfate, 5 parts of zinc phosphate), 2 parts of wetting agent, 2 parts of defoaming agent , 2 parts of anti-settling agent, 2 parts of leveling agent and 40 parts of deionized water; the raw materials of component B are: 13.8 parts of epoxy curing agent.

[0061] The particle size of emulsified asphalt D50<1 micron;

[0062] Epoxy resin, product name, EL-5320 water-based epoxy resin emulsion, item number 002, purchased from Yixing Huaxia Chemical Materials Co., Ltd.; Coumarone resin, grade, 14, purchased from Hengshui Zehao Rubber Chemical Co., Ltd.; Curing agent, product n...

Embodiment 2

[0073] A two-component waterborne epoxy carbon-based coating, the preparation raw materials include component A and component B; by weight, the raw materials of component A include: 10 parts of emulsified asphalt, 25 parts of epoxy resin, coumarone resin 5 parts, 1 part of carbon material graphene, 15 parts of filler (respectively: 2 parts of iron red, 3 parts of mica powder, 5 parts of precipitated barium sulfate, 5 parts of zinc phosphate), 2 parts of wetting agent, 2 parts of defoaming agent , 2 parts of anti-settling agent, 2 parts of leveling agent, 40 parts of deionized water; the raw materials of component B are: 11.5 parts of epoxy curing agent.

[0074] The particle size of emulsified asphalt D50<1 micron;

[0075] Epoxy resin, product name, EL-5320 water-based epoxy resin emulsion, item number 002, purchased from Yixing Huaxia Chemical Materials Co., Ltd.; Coumarone resin, grade, 14, purchased from Hengshui Zehao Rubber Chemical Co., Ltd.; Curing agent, product name...

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Abstract

The invention discloses a two-component waterborne epoxy carbon-based coating and a preparation method thereof. The invention belongs to the technical field of coatings, and relates to a two-componentcoating and a preparation method thereof. The double-component coating is prepared from a component A and a component B. The component A is prepared from the following raw materials of: emulsified asphalt, epoxy resin, coumarone resin, a carbon material, a filler and deionized water; the raw material of the component B is an epoxy curing agent; and the particle size D50 of the emulsified asphaltis less than 3 microns. The prepared coating is high in adhesive force to a base material; the permeability of thecoating to the base material is enhanced; a compact protective film is formed on the surface of the base material; water vapor and a corrosive medium are prevented from entering the coating, so that the corrosion resistance of the coating is greatly improved; and the small-particle-size emulsified asphalt and the carbon material are added in the preparation process of the coating to act together, so that the problem of overlarge viscosity of the coating can be solved, the thicknessof a hydration layer is reduced, and the coating with the optimal adhesion effect is obtained.

Description

technical field [0001] The application belongs to the technical field of coatings, and more specifically relates to a two-component waterborne epoxy carbon-based coating and a preparation method thereof. Background technique [0002] As an important industrial coating, epoxy coating is more and more widely used in railway construction, oil pipeline, automobile manufacturing and other industries. In order to improve the adhesion and anti-corrosion performance of epoxy coatings, two-component coatings have been the direction of researchers' efforts. [0003] "Research on the preparation process of the third-generation two-component water-based epoxy coating" (Zhou Houwei, January 2016, Volume 31, No. 01, China Paint), discloses a preparation method of a water-based iron brown primer for railway wagons , is a research result of water-based epoxy coating; the invention patent application with application number CN 107312457A discloses "water-based two-component coal tar pitch a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D195/00C09D145/02C09D7/61C09D5/08
CPCC08K2003/2272C08K2003/3045C08K2003/328C09D5/08C09D163/00C09D7/61C08L95/00C08L45/02C08K13/02C08K3/042C08K3/22C08K3/34C08K3/30C08K3/32
Inventor 史星照李赟
Owner 宜兴市华夏化工材料有限公司