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Bi-component corrosion-prevention and coagulation-prevention modified epoxy zinc-rich coating

An epoxy zinc-rich coating, two-component technology, applied in the direction of anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of poor anti-corrosion performance, coating failure, etc., to enhance stability, solve easy coagulation, The effect of superior anti-corrosion performance

Inactive Publication Date: 2019-10-08
嘉兴瑛蔓贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a two-component anti-corrosion and anti-coagulation modified epoxy zinc-rich coating, which solves the problem that the existing water-based epoxy zinc-rich coating is easy to sink to the bottom of the epoxy resin. Agglomeration and precipitation occurred, leading to the technical problem of coating failure, and at the same time solved the problem of poor corrosion resistance of water-based epoxy zinc-rich coatings

Method used

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  • Bi-component corrosion-prevention and coagulation-prevention modified epoxy zinc-rich coating

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preparation example Construction

[0023] A two-component anti-corrosion anti-coagulation modified epoxy zinc-rich coating, the formula includes experimental materials such as curing agent and anti-settling agent, the curing agent is a modified phenalkamine curing agent, and the modified phenalkamine is based on the weight of the formula. The content of the curing agent is 0.4-0.8wt%, using the modified phenalkamine curing agent prepared by cardanol-phenol mixed phenol modified ethylenediamine, utilizing the modified phenalkamine curing agent as the carrier of zinc powder, first dispersing it into Zinc paste, and then add water-based epoxy emulsion for mixing and curing to prepare a two-component anti-corrosion and anti-coagulation modified epoxy zinc-rich coating with excellent performance. The overall performance is better than that of solvent-based epoxy zinc-rich coatings, and can be applied In the protective coating of metals that require high salt spray resistance, the anti-settling agent is a three-compon...

Embodiment 1

[0029] (1) Weigh 65wt% metal zinc powder, which is a mixture of elemental zinc and zinc hydroxide, and place it in a ball mill jar with absolute ethanol to grind to a particle size of 1200 mesh fine zinc powder to prepare a mixed zinc slurry ;

[0030] (2) Take by weighing 10wt% epoxy resin, epoxy resin is bisphenol A type E55 water-based epoxy emulsion, add in the high-speed stirrer, stir 0.5 under the rotating speed of 1500rpm / min, make the water-based epoxy emulsion distribute evenly;

[0031] (3) Then add 5wt% co-solvent to high-speed stirrer successively, co-solvent is the mixed solution of propylene glycol monomethyl ether and dipropylene glycol monomethyl ether, mass ratio is 5:1, 0.4wt% curing agent, curing agent is to use cardanol -modified phenalkamine curing agent prepared by phenol mixed phenol modified ethylenediamine, 3wt% anti-settling agent, anti-settling agent is a three-component mixture of fumed silica, modified phenalkamine curing agent and organic bentonit...

Embodiment 2

[0034] (1) Weigh 66wt% metal zinc powder, the metal zinc powder is a mixture of elemental zinc and zinc hydroxide, and place it in a ball mill jar together with absolute ethanol to grind to a particle size of 1200 mesh fine zinc powder to prepare a mixed zinc slurry ;

[0035] (2) Take by weighing 12wt% epoxy resin, epoxy resin is bisphenol A type E55 water-based epoxy emulsion, add in the high-speed stirrer, stir 0.5h under the rotating speed of 1500rpm / min, make the water-based epoxy emulsion distribute evenly;

[0036] (3) Then add 6wt% co-solvent to high-speed stirrer successively, co-solvent is the mixed solution of propylene glycol monomethyl ether and dipropylene glycol monomethyl ether, mass ratio is 5:1, 0.5wt% curing agent, curing agent is to use cardanol -modified phenalkamine curing agent prepared by phenol mixed phenol modified ethylenediamine, 3wt% anti-settling agent, anti-settling agent is a three-component mixture of fumed silica, modified phenalkamine curing ...

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Abstract

The invention relates to the technical field of epoxy zinc-rich coating preparation and discloses bi-component corrosion-prevention and coagulation-prevention modified epoxy zinc-rich coating. In theformula, the bi-component corrosion-prevention and coagulation-prevention modified epoxy zinc-rich coating is prepared from experimental raw materials such as a curing agent and an anti-settling agent, and a modified mannich amide curing agent prepared from cardanol-phenol mixed modified ethanediamine is used. According to the bi-component corrosion-prevention and coagulation-prevention modified epoxy zinc-rich coating, a mixture of gel amorphous silica, the mannich amide curing agent and organic bentonite is used as the ternary mixed anti-settling agent, wherein the mannich amide curing agentserves as a carrier of zinc powder, the problem that the zinc powder is prone to coagulation in liquid coating is well solved, a mixture of propylene glycol monomethyl ether and dipropylene glycol methyl ether is used as a mixed co-solvent, the stability of the metal zinc powder in the liquid coating is improved, a mixture of elementary zinc and zinc hydroxide is used as the metal zinc powder, and the protecting principle of a metal zinc powder sacrificial anode is utilized to obtain excellent corrosion-prevention performance.

Description

technical field [0001] The invention relates to the technical field of preparation of epoxy zinc-rich paint, in particular to a two-component anti-corrosion and anti-coagulation epoxy zinc-rich paint. Background technique [0002] Corrosion is the process of loss and damage of metal, concrete, wood and other objects by the chemical or electrochemical action of the surrounding environment medium (water, air, acid, alkali, salt). Economic loss, the process of preventing or slowing down corrosion has long been practiced using a variety of techniques. [0003] Zinc-rich coatings can be divided into organic zinc-rich coatings and inorganic zinc-rich coatings according to different film-forming substances. Among them, water-based epoxy zinc-rich coatings are the most important type of organic zinc-rich coatings, but the existing water-based epoxy zinc-rich coatings The paint has the following problems: since the density of zinc powder is much greater than that of epoxy resin, zin...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/10C09D7/45C09D7/63C08G59/62
CPCC08G59/623C08K2003/0893C08K2003/2296C09D5/106C09D7/45C09D7/63C09D163/00C08K13/06C08K9/04C08K3/36C08K5/06C08K3/08C08K3/22
Inventor 张海苗赵川乔如春
Owner 嘉兴瑛蔓贸易有限公司
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