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Method for improving corrosion resistance of powder coating

A powder coating and anti-corrosion technology, used in powder coatings, anti-corrosion coatings, polyester coatings, etc., can solve the problems of insufficient, unusable, easy to break, etc., to reduce the cost of use, reduce the thickness of the coating film, and achieve high anti-corrosion. performance effect

Inactive Publication Date: 2021-04-23
天津西敦粉漆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ether bond on the main chain of epoxy resin is prone to breakage under ultraviolet (UV) irradiation in sunlight, so it cannot be used as an outdoor topcoat
Although the anti-corrosion performance of polyester powder coatings is slightly inferior to that of epoxy powder coatings, there is no problem of solar chalking; therefore, the above-mentioned systems all have certain defects or limitations

Method used

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  • Method for improving corrosion resistance of powder coating
  • Method for improving corrosion resistance of powder coating
  • Method for improving corrosion resistance of powder coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Graphene and zinc phosphate are added to the raw materials of polyester / TGIC powder coating in the mass ratio of 0.5% and 1.0% respectively, and mixed uniformly according to the processing step 1, and the prepared mixture is obtained according to the processing steps 2 and 3 Anti-corrosion powder coating with median particle size (D50, V)≤40μm.

Embodiment 2

[0036] Graphene and zinc phosphate are added to the raw materials of polyester / epoxy hybrid powder coatings in an amount of 0.5% and 8.0% by mass respectively, and mixed uniformly according to processing step 1, and the prepared mixture is processed according to processing step 2 and 3 Prepare an anti-corrosion powder coating with a median particle size (D50, V) ≤ 40 μm.

Embodiment 3

[0038] Add nano-clay and zinc phosphate to the raw materials of polyurethane powder coatings in the mass ratio of 6.0% and 2.0%, respectively, and mix them uniformly according to processing step 1, and the prepared mixture is obtained according to processing steps 2 and 3. Anti-corrosion ultra-fine powder coating with particle size (D50, V)≤22μm.

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Abstract

The invention relates to the field of preparation methods of high polymer materials, and particularly discloses a method for improving the corrosion resistance of a powder coating. The method comprises the steps of adding an anti-corrosion auxiliary agent into the powder coating, wherein the anti-corrosion auxiliary agent comprises a first auxiliary agent, or a second auxiliary agent, or a third auxiliary agent, or a mixture of any two of the first auxiliary agent, the second auxiliary agent and the third auxiliary agent, or a mixture of the three auxiliary agents, the first auxiliary agent comprises nano clay, the second auxiliary agent comprises a composition of a barrier type pigment and an inorganic salt antirust pigment, and the third auxiliary agent comprises a composition of a carbon nanotube and a derivative thereof and metal powder with a sacrificial anode effect. According to the invention, a method of adding a special compound anti-corrosion auxiliary agent into a common coating is adopted, the obtained powder coating has higher anti-corrosion performance and wider application fields including common corrosion prevention and heavy corrosion prevention, and the method of directly adding the auxiliary agent is more economical and effective than a method of changing a resin curing agent and has stronger universality.

Description

technical field [0001] The invention relates to the field of preparation of polymer materials, in particular to a method for improving the anticorrosion performance of powder coatings. Background technique [0002] Solvent-based coatings are mainstream products in the anti-corrosion and heavy-duty coating industries. During the manufacturing, construction and baking curing process of traditional solvent-based coatings, a large amount of volatile organic compounds (VOCs) are volatilized into the air. Many widely used solvents are toxic and harmful substances, which are harmful to the safety, health and environmental protection (HSE) of the manufacturing process, operators and surrounding environment. In recent years, water-based coatings have made great progress in replacing solvent-based coatings, but due to factors such as slow drying, harsh construction temperature and humidity conditions, and high costs, they still cannot replace solvent-based coatings on a large scale. ...

Claims

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Application Information

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IPC IPC(8): C09D5/03C09D5/10C09D5/08C09D167/00C09D133/04C09D163/00C09D175/04
CPCC09D5/038C09D5/08C09D5/084C09D5/106C09D167/00C09D163/00C09D175/04C09D133/04C08K2003/328C08K2201/011C08K2003/0893C08K3/042C08K3/32C08L63/00C08K3/04C08K3/346C08K3/041C08K3/08
Inventor 祝京旭张辉
Owner 天津西敦粉漆科技有限公司
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