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A kind of solvent-free epoxy zinc-rich anticorrosion coating and preparation method thereof

An epoxy zinc-rich, anti-corrosion coating technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problem that the surface of the coating is prone to pits, pinholes, orange peel, and the thickness of the coating film easily exceeds 150μm , poor storage stability of operational coatings, etc., to achieve excellent anti-corrosion performance, improve resource utilization efficiency, and improve the effect of isolation and shielding performance

Active Publication Date: 2021-12-24
WUXI HUADONG ZINDN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the strengthening of people's awareness of environmental protection and the development of maintenance-free coating systems, long-lasting, environmentally friendly, and energy-saving solvent-free anti-corrosion coatings are increasingly used in engineering construction, and the shortcomings of solvent-based epoxy zinc-rich coatings are : The operability of the construction and the stability of the paint storage are poor, the paint film is easy to foam, and more importantly, the VOC content is high, and the solvent-based paint is usually not environmentally friendly
However, solvent-free coatings also have disadvantages. The more prominent ones are the high viscosity of the coating, which is not convenient for construction, and the coating needs to be heated when spraying; due to the high viscosity, it is difficult to obtain a thinner coating, which is often suitable for thick coating.
When spraying, the thickness of the coating film is likely to exceed 150 μm, resulting in waste. When the thickness of the coating film is less than 100 μm, defects such as pits, pinholes, and orange peel are prone to appear on the surface of the coating

Method used

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  • A kind of solvent-free epoxy zinc-rich anticorrosion coating and preparation method thereof
  • A kind of solvent-free epoxy zinc-rich anticorrosion coating and preparation method thereof
  • A kind of solvent-free epoxy zinc-rich anticorrosion coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A solvent-free epoxy zinc-rich anti-corrosion coating, comprising A component and B component, wherein A component is calculated by weight, including:

[0041]

[0042] Component B includes the following components by weight fraction:

[0043] 4 parts of modified phenalkamine curing agent;

[0044] 1 part polyamide curing agent;

[0045] 0.25 parts of curing accelerator;

[0046] The weight ratio of component A to component B is 0.8:1; according to the weight ratio, component A and component B are mixed, stirred evenly and matured for 7-15 minutes before coating.

[0047] The specific preparation method is as follows:

[0048] ① Weigh the raw materials according to the above ratio, add the epoxy resin; then slowly add the active diluent, the stirring speed is 500-800r / min, and stir for 10-15 minutes;

[0049] ②Adjust the stirring speed to 800~1000r / min, add thixotropic agent and coupling agent during the stirring process, then keep stirring at 1000~2500 r / min, ke...

Embodiment 2

[0055] A solvent-free epoxy zinc-rich anti-corrosion coating, comprising A component and B component, wherein A component is calculated by weight, including:

[0056]

[0057] Contains the following B components by weight:

[0058] 2.5 parts of modified phenalkamine curing agent;

[0059] 2.5 parts of polyamide curing agent;

[0060] 0.4 parts of curing accelerator;

[0061] Preparation method: with embodiment 1.

[0062] The weight ratio of the A component to the B component is 1.2:1; according to the weight ratio, the A component and the B component are mixed, stirred and matured for 7 to 15 minutes before coating.

Embodiment 3

[0064] A solvent-free epoxy zinc-rich anti-corrosion coating, comprising A component and B component, wherein A component is calculated by weight, including:

[0065]

[0066] Contains the following B components by weight:

[0067] 2.5 parts of modified phenalkamine curing agent;

[0068] 2.5 parts of polyamide curing agent;

[0069] 0.3 parts of curing accelerator;

[0070] Preparation method: with embodiment 1.

[0071] The weight ratio of the A component to the B component is 0.95:1; according to the weight ratio, the A component and the B component are mixed, stirred evenly and matured for 7-15 minutes before coating.

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Abstract

The invention discloses a solvent-free epoxy zinc-rich anti-corrosion coating, which combines a large amount of zinc with high solid epoxy resin, epoxy active diluent, plasticizer, coupling agent, polyamine curing agent and accelerator. Powder and a small amount of glass flakes are used as anti-corrosion fillers to make a solvent-free epoxy zinc-rich anti-corrosion coating with high performance and high volume solid content. The product can form a film at low temperature, has good coating stability, low viscosity, no need for heating, good mechanical properties and good adhesion. There is no solvent volatilization during curing, which can eliminate pinholes in the coating, improve the compactness and isolation and shielding performance of the coating, provide superior corrosion resistance, no harmful VOC during production and construction, protect the environment and save resources; it can also significantly Reduce construction costs.

Description

technical field [0001] The invention relates to the technical field of chemical coatings, in particular to a solvent-free epoxy zinc-rich anticorrosion coating and a preparation method thereof. Background technique [0002] Metal materials play a very important role in economic life; the phenomenon that metal materials undergo physical changes, chemical changes and electrochemical changes in a corrosive environment, resulting in performance changes until they are completely damaged, is called metal material corrosion. However, corrosion of metal materials is a serious problem facing the world. Corrosion not only consumes precious wealth, but also destroys normal life and production order. Corrosion and environmental pollution have attracted more and more attention. Anti-corrosion coatings are used to protect metals. It is the most effective and economical method, among which, anti-corrosion coating for metal structure equipment is currently the fastest and most effective met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/02C09D5/10C09D7/20C09D7/63C08G59/60
CPCC09D163/00C09D5/106C09D7/20C09D7/63C08G59/60C08K2003/0893C08L2205/025C08L63/00C08K13/02C08K3/08C08K3/40C08K5/05C08K5/5435
Inventor 杨志华周贤辉王自龙陈立庄
Owner WUXI HUADONG ZINDN TECH
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