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Anti-corrosion coating method

A coating method and anti-corrosion technology, applied to anti-corrosion coatings, devices for coating liquid on surfaces, coatings, etc., can solve problems such as difficulty in exerting anti-corrosion properties, and achieve excellent anti-corrosion properties and excellent natural environment effects

Active Publication Date: 2019-07-23
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012]However, in a severe corrosive environment such as the seashore where the amount of salt is significantly high and the object to be coated is kept in a wet state for a long time, if the patent document 3 and the water-based coating composition described in 4, it is difficult to exert sufficient corrosion resistance

Method used

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Examples

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Embodiment

[0180] Below, examples are given to further illustrate the present invention. Here, "parts" and "%" represent "parts by mass" and "% by mass", respectively.

[0181]

preparation example 1

[0183] 3200 parts of "jER828" (trade name, manufactured by Mitsubishi Chemical Co., Ltd., bisphenol A type resin, epoxy equivalent 190, number average molecular weight 375), 1,700 parts of bisphenol A (molecular weight 228), 900 parts of methyl isobutyl ketone (boiling point 120°C), and 5.0 parts of benzyldimethylamine are reacted at 120°C until the epoxy equivalent of the unit non-volatile components It is 2500g / equivalent.

[0184] Next, 590 parts of ketimides obtained by treating 3,3'-diaminodipropylamine with methyl isobutyl ketone were added, and it was made to react at 120 degreeC for 1 hour. Then, 54 parts of deionized water and 380 parts of glycidyl neodecanoate were charged and reacted at 100° C. for 2 hours. Then, add 90 parts of acetic acid and 70 parts of deionized water, stir the internal liquid to mix, add 6500 parts of deionized water for water dispersion, remove methyl isobutyl ketone under reduced pressure, and adjust the solid content with deionized water. ...

preparation example 2～5

[0187] Resin emulsions (A-2) to (A-5) were prepared in the same manner as above except that the composition was blended as shown in Table 1 below.

[0188] Table 1

[0189]

[0190]

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Abstract

The purpose of the present invention is to provide an anticorrosive coating method that can exhibit corrosion resistance even when an aqueous coating material is used in a harsh corrosive environment.The invention relates to an anti-corrosion coating method and a coated body. The anti-corrosion coating method comprises the step (1) of coating an anti-corrosion water-based primer (I) on the surface of a metal-based substrate to form a primer film, a step (2) for forming a top coat film having a dry film thickness of 100 [mu] m or more by applying a top coat (II) containing 3-25 mass% of a glass sheet in a coating non-volatile component to the top coat film; wherein the water-based primer (I) contains an amino group-containing resin emulsion (A), an epoxy group-containing resin emulsion (B)and an antirust pigment component (C).

Description

technical field [0001] The invention relates to an anti-corrosion coating method. Background technique [0002] Steel is widely used in offshore engineering structures, harbor facilities, ships, buildings, civil engineering structures, automobiles, etc., but it has the problem of corrosion when exposed to the natural environment. As a method of preventing or suppressing corrosion, anti-corrosion coating is performed. [0003] In recent years, a large number of steel structures such as iron bridges, factory buildings, iron towers, and oil facilities have ushered in an aging period and need to be repainted. [0004] Usually, in order to carry out the renovation coating of steel structures, the base treatment before coating is very important, and its precision determines the life of the coating film. As the surface treatment, the following methods are specifically mentioned: removing the rusted part of the rusted part of the steel structure; roughening the surface of the old ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D7/24C09D163/00C09D5/08
CPCB05D5/00B05D7/24C09D163/00C09D5/08
Inventor 太田伶美土冈育朗松田英树
Owner KANSAI PAINT CO LTD
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