Solvent-free epoxy heavy anti-corrosion coating as well as preparation method and application thereof

A heavy-duty, solvent-free technology, applied in the field of coatings, can solve problems such as unsatisfactory corrosion protection of metal and concrete substrates, unsatisfactory acid, alkali and salt spray resistance of coatings, and affecting the anti-corrosion effect of coatings. Excellent salt spray, excellent acid and alkali resistance, high adhesion effect

Inactive Publication Date: 2021-06-25
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solvent-free coatings currently on the market are limited by their own material properties and processes, and the corrosion protection effect on metal and concrete substrates is often not ideal. The cost of individual outstanding performance is high, which reduces the cost performance of coatings.
The prior art reports a solvent-free epoxy steel structure anticorrosion coating, but the acid resistance, alkali resistance and salt spray resistance of the coating are not ideal
Patent 201710323891.8 reports a solvent-free anti-corrosion coating, but the coating contains a sealing primer and a top coat, and the thickness of a single film is relatively thin, which increases the number of constructions and affects the anti-corrosion effect of the coating

Method used

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  • Solvent-free epoxy heavy anti-corrosion coating as well as preparation method and application thereof
  • Solvent-free epoxy heavy anti-corrosion coating as well as preparation method and application thereof
  • Solvent-free epoxy heavy anti-corrosion coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The components of the solvent-free epoxy heavy-duty anti-corrosion coating described in this embodiment are: 50 parts of epoxy resin, 25 parts of polyamide resin, 7 parts of alkyd resin, 1 part of dispersant, 1 part of defoamer, 2 parts of leveling agent, 2 parts of anti-settling agent, 40 parts of filler, 1 part of rheological additive, and 16.7 parts of curing agent.

[0022] The preparation method of solvent-free epoxy heavy-duty anticorrosion coating described in the present embodiment comprises the following steps:

[0023] (1) Preparation of bisphenol A epoxy resin

[0024] Install the stirrer, return condenser tube and thermometer on the 500mL three-necked flask. Add 12.3 parts of bisphenol A, 41 parts of epichlorohydrin, and 4.1 parts of NaOH and mix and stir. Then slowly heat to 80°C, and finish the reaction after 3 hours of reaction. The reaction solution was filtered to remove by-product NaCl, and excess epichlorohydrin (recovery) was distilled off under r...

Embodiment 2

[0030] The components of the solvent-free epoxy heavy-duty anti-corrosion coating described in this embodiment are: 60 parts of epoxy resin, 30 parts of polyamide resin, 10 parts of alkyd resin, 1 part of dispersant, 1 part of defoamer, 2 parts of leveling agent, 2 parts of anti-settling agent, 70 parts of filler, 1 part of rheological additive, and 20 parts of curing agent.

[0031] The preparation method of solvent-free epoxy heavy-duty anticorrosion coating described in the present embodiment comprises the following steps:

[0032] (1) Preparation of bisphenol A epoxy resin

[0033] Install the stirrer, return condenser tube and thermometer on the 500mL three-necked flask. Add 12.6 parts of bisphenol A, 42 parts of epichlorohydrin, and 4.2 parts of NaOH and mix and stir. Then slowly heat to 80°C, and finish the reaction after 3 hours of reaction. The reaction solution was filtered to remove by-product NaCl, and excess epichlorohydrin (recovery) was distilled off under re...

Embodiment 3

[0039] The components of the solvent-free epoxy heavy-duty anti-corrosion coating described in this embodiment are: 40 parts of epoxy resin, 20 parts of polyamide resin, 5 parts of alkyd resin, 1 part of dispersant, 1 part of defoamer, 2 parts of leveling agent, 2 parts of anti-settling agent, 35 parts of filler, 1 part of rheological additive, and 13.7 parts of curing agent.

[0040] The preparation method of solvent-free epoxy heavy-duty anticorrosion coating described in the present embodiment comprises the following steps:

[0041] (1) Preparation of bisphenol A epoxy resin

[0042] Install the stirrer, return condenser tube and thermometer on the 500mL three-necked flask. Add 11.4 parts of bisphenol A, 38 parts of epichlorohydrin, and 3.8 parts of NaOH, mix and stir, then slowly heat to 80°C, and finish the reaction after 3 hours of reaction. The reaction solution was filtered to remove by-product NaCl, and excess epichlorohydrin (recovery) was distilled off under reduc...

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Abstract

The invention provides a solvent-free epoxy heavy anti-corrosion coating as well as a preparation method and application thereof, and belongs to the technical field of coatings. The solvent-free epoxy heavy anti-corrosion coating comprises the following components in parts by weight: 30-60 parts of epoxy resin, 20-30 parts of polyamide resin, 5-10 parts of alkyd resin, 0.5-2 parts of a dispersing agent, 0.5-2 parts of a defoaming agent, 1-3 parts of a flatting agent, 1-3 parts of an anti-settling agent, 30-70 parts of a filler, 1-2 parts of a rheological additive and 10-20 parts of a curing agent. The solvent-free epoxy heavy anti-corrosion coating disclosed by the invention combines the advantages of the epoxy resin, the polyamide resin and the alkyd resin, not only has the characteristics of good film-forming property and high adhesive force of the epoxy resin, but also has the characteristics of high viscosity and good gloss retention of the alkyd resin and the characteristics of good flexibility, wear resistance, oil resistance, water resistance and good chemical corrosion resistance of the polyamide resin.

Description

technical field [0001] The invention relates to a preparation method and application of a solvent-free epoxy heavy-duty anticorrosion coating, belonging to the technical field of coatings. Background technique [0002] Corrosion has always been one of the biggest challenges facing the steel, metallurgy, construction, transportation and other industries. Statistics show that every time the second hand on a watch makes one and a half revolutions, one ton of steel in the world is corroded into slag. The loss caused by corrosion in my country in 2015 was as high as 3 trillion yuan. According to this calculation, if correct protective measures are taken, my country can reduce at least 750-1.2 trillion yuan of corrosion loss every year. Anti-corrosion coatings are the most economical, most commonly used and most effective means of anti-corrosion protection for metal or concrete materials today. Anti-corrosion coatings are usually divided into two types: conventional type and hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D177/00C09D167/08C09D5/08C09D7/61C08G59/14C08G59/50
CPCC09D163/00C09D5/08C09D7/61C08G59/1477C08G59/5006C08L2205/03C08K2003/2241C08K2003/3045
Inventor 李伟华刘睿曹文凯
Owner SUN YAT SEN UNIV
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