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Waterborne anti-corrosion coating composition and anti-corrosion coating method

A technology of anti-corrosion coatings and compositions, applied in anti-corrosion coatings, epoxy resin coatings, devices for coating liquids on the surface, etc., can solve problems such as inability to exhibit anti-corrosion properties, spot rust, etc., and achieve excellent storage stability , sufficient corrosion resistance, and the effect of reducing the total labor force

Active Publication Date: 2022-02-25
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when these paints are applied to rusty surfaces or exposed to severe environments such as seaside environments for a long period of time, sufficient corrosion resistance may not be exhibited, and spot rust (rust stains and rust spots) sometimes occurs on the painted surface

Method used

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  • Waterborne anti-corrosion coating composition and anti-corrosion coating method
  • Waterborne anti-corrosion coating composition and anti-corrosion coating method
  • Waterborne anti-corrosion coating composition and anti-corrosion coating method

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Embodiment

[0177] The present invention is further explained below with reference to Examples. Hereinafter, "parts" and "%" represent "parts by mass" and "% by mass", respectively.

[0178] Production of water-reducible polyamine resin (A)

manufacture example 1

[0180] 3200 parts of "jER828" (trade name, manufactured by Mitsubishi Chemical Corporation; bisphenol A resin with an epoxy equivalent of 190 and a number average molecular weight of 375), 1700 parts of bisphenol A (molecular weight of 228), 900 parts of methyliso Butyl ketone and 5.0 parts of benzyldimethylamine were placed in a flask equipped with a stirrer, a thermometer, a nitrogen gas introduction tube, and a reflux condenser, and reacted at 120 °C until the epoxy equivalent per unit of non-volatile content It is 2500g / equivalent.

[0181] Then, 590 parts of a ketimidation product of 3,3'-diaminodipropylamine and methyl isobutyl ketone were added, and reacted at 120°C for 1 hour.

[0182] Then, 54 parts of deionized water and 380 parts of glycidyl neodecanoate were put therein, and reacted at 100° C. for 2 hours.

[0183] Thereafter, 90 parts of acetic acid and 70 parts of deionized water were added, and the inner solution was stirred and mixed. After adding 6,500 parts...

manufacture example 2 to manufacture example 8

[0186] Water-dilutable polyamine resins (A-2) to (A8) were produced in the same manner as above except for using the formulation composition of Table 1 below.

[0187] Table 1

[0188]

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Abstract

The present invention provides a two-component water-based anticorrosion coating composition, which comprises: the first component (I) containing water-dilutable polyamine resin (A) and antirust pigment component (B), and containing water-dilutable The second component (II) of epoxy-based resin (C); the water-dilutable polyamine resin contains epoxy resin (a1) and polyamine compound (a2) as raw materials for manufacture and has 20 to 120 mgKOH / Resin with a total amine value of g; the antirust pigment component partly includes antirust pigment (b), and the antirust pigment can dissolve and be selected from magnesium ions, aluminum ions, calcium ions, zinc ions, silicate ions, phosphoric acid At least one ion among radical ions, vanadate ions and molybdate ions; based on 100 parts by mass of the water-dilutable polyamine resin, the antirust pigment component accounts for 1 to 100 parts by mass; and the water-containing The weight-average molecular weight of the dilutable epoxy-based resin is lower than that of the water-dilutable polyamine resin.

Description

technical field [0001] The invention relates to a water-based anticorrosion coating composition and an anticorrosion coating method. Background technique [0002] Steel materials are widely used in many fields such as offshore engineering structures, harbor facilities, ships, buildings, civil engineering structures, automobiles; however, they have a problem of corrosion when exposed to the natural environment. As a method of preventing or suppressing corrosion, anti-corrosion coating is implemented. [0003] In recent years, steel structures such as iron bridges, factories, steel towers, and oil facilities have entered a period of aging and require repainting. [0004] In general, for repair coating of steel structures, ground treatment before coating is important. The life of the coating film depends on the precision of the substrate preparation. Specific examples of the base treatment include removal of rusted parts of rusted parts of steel structures, roughening of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00B05D7/14B05D7/24C09D5/02C09D5/08C09D7/61C09D7/63C09D7/65
CPCB05D7/14B05D7/24C09D5/02C09D5/08C09D163/00
Inventor 太田伶美木村友哉松田英树堀常晃佐野真
Owner KANSAI PAINT CO LTD
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