One-component waterborne epoxy ester anticorrosive priming paint used for automobile chassis and preparation method of one-component waterborne epoxy ester anticorrosive priming paint

A technology for anti-corrosion primer and automobile chassis, applied in anti-corrosion coatings, coatings, etc., to achieve the effect of low acid value, small particle size of latex particles, and improved water resistance and anti-corrosion performance

Inactive Publication Date: 2017-03-29
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Until now, there are only a few patents on water-based epoxy ester and its anti-corrosion primer, and there are almost no patents on water-based epoxy ester anti-corrosion primer for automobile chassis.

Method used

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  • One-component waterborne epoxy ester anticorrosive priming paint used for automobile chassis and preparation method of one-component waterborne epoxy ester anticorrosive priming paint
  • One-component waterborne epoxy ester anticorrosive priming paint used for automobile chassis and preparation method of one-component waterborne epoxy ester anticorrosive priming paint
  • One-component waterborne epoxy ester anticorrosive priming paint used for automobile chassis and preparation method of one-component waterborne epoxy ester anticorrosive priming paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Example 1. Preparation of acrylic resin

[0077] According to the formula shown in Table 1, the unsaturated fatty acid was put into the reaction flask, and the temperature was gradually raised to 140 ° C ~ 145 ° C under stirring, and the monomer mixture was continuously and uniformly added dropwise for 5 to 8 hours. ℃~145℃ for 3 to 4 hours until the conversion rate is over 98%, as evidenced by the solid content. Acrylic resins A1-A4 were obtained. The formulations and acid values ​​of the acrylic resins A1-A4 are listed in Table 1.

[0078] Table 1 Formula and acid value of acrylic resin A1-A4

[0079]

Embodiment 2

[0080] Example 2, preparation of epoxy ester resin

[0081] According to the formula in Table 2, take 40% to 50% by weight of unsaturated fatty acid and 50% to 60% by weight of epoxy resin to carry out esterification at 190 to 200°C to obtain an acid value of 5 to 10 mg KOH / g epoxy ester resin B1-B4.

[0082] Table 2 Formula and acid value of epoxy ester resin B1-B4

[0083]

[0084]

Embodiment 3

[0085] Example 3. Preparation of water-based epoxy ester resin

[0086] According to the formula in Table 3, the acrylic resins A1-A4 prepared in Example 1 were added to the epoxy ester resins B1-B4 prepared in Example 2, respectively, and the esterification reaction was carried out at 190-200 ° C until the final acid The value is 20-50 mg KOH / g, and finally diluted with the cosolvent ethylene glycol butyl ether until the solid weight percentage is 70-75% to obtain the water-based epoxy ester resin.

[0087] Table 3 Formula and acid value of water-based epoxy ester resin

[0088]

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Abstract

The invention provides one-component waterborne epoxy ester anticorrosive priming paint used for an automobile chassis and a preparation method of the one-component waterborne epoxy ester anticorrosive priming paint. The priming paint is prepared from, by weight, 20-30% of waterborne epoxy ester resin, 2-45% of pigment, 0-15% of anti-rust pigment, 0-17% of filler, 0.5-2.0% of neutralization agent, 0-3.0% of wetting dispersant, 0.05-0.5% of defoamer, 0.1-1.0% of waterborne dryer, 0.1-0.5% of leveling agent, 0.1-0.5% of thickening agent and 20-40% of deionized water. The invention further provides the preparation method of the anticorrosive priming paint, and various indicators of the anticorrosive priming paint all reach the indicator level of solvent type automobile chassis anticorrosive priming paint; the anticorrosive priming paint can completely replace the solvent type automobile chassis anticorrosive priming paint, and is high in drying speed, good in storage stability, excellent in water resistance and corrosion resistance, good in self-crosslinking property, safe in use, wide in raw material source and low in cost, and large-scale application and promotion are convenient to achieve.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a one-component waterborne epoxy ester anti-corrosion primer for automobile chassis and a preparation method thereof. Background technique [0002] The car chassis is one of the components that need to withstand the most complex and harsh environments during the use of the car. From the time the new car rolls off the production line to the time it is scrapped, the chassis has been bearing the mission of supporting the body, experiencing the impact of the sand and gravel rolled up by the high-speed rotating wheels, facing the erosion of rain, snow, mud, etc., and also encountering bumpy road rubbing injury and destruction. These harsh operating conditions are unbearable for the chassis steel plate that has only undergone simple anti-corrosion treatment. With the increasing number of domestic automobiles, the development potential of anti-corrosion primers that have anti-corro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D187/00C09D5/08C08G81/02
CPCC09D187/005C08G81/024C09D5/08
Inventor 赵其中刘卫峰李洁
Owner SHANGHAI HUAYI FINE CHEM CO LTD
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