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A kind of waterborne epoxy modified acrylic resin and preparation method thereof

An acrylic resin and water-based epoxy technology, applied in the field of water-based coatings, can solve the problem that water-based resins are difficult to meet the performance indicators of automobile axles, and achieve the effects of excellent hardness and adhesion, reducing environmental pollution, and reducing environmental and human injury.

Active Publication Date: 2021-07-13
中山大桥化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, under the conditions of low-temperature baking, energy saving and emission reduction, it is difficult for a single type of water-based resin to meet the performance indicators of the coating of automobile axles, frames and their parts

Method used

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  • A kind of waterborne epoxy modified acrylic resin and preparation method thereof
  • A kind of waterborne epoxy modified acrylic resin and preparation method thereof
  • A kind of waterborne epoxy modified acrylic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation of waterborne epoxy modified acrylic resin, the steps are as follows:

[0037] (1) Preparation of epoxy ester resin: under nitrogen protection, 15 parts of oleic acid, 20 parts of tungoleic acid, 10 parts of soybean oleic acid, 20 parts of epoxy resin, 0.02 part of zinc oxide, 7 parts of butanone, 8 parts Ethylene glycol butyl ether was added into a four-necked reaction flask equipped with a stirrer, an air guide tube, a thermometer, and a condenser tube. Under the protection of nitrogen, the temperature was raised to 80° C. for 2 hours, and then the temperature was raised to 140° C. for 2 hours until the acid value of the epoxy ester resin was 3 mgKOH / g to obtain an epoxy ester resin.

[0038] (2) Preparation of hydrophilic acrylic resin: under nitrogen protection, add 25 parts of methyl methacrylate, 5 parts of diacetone acrylamide, 30 parts of styrene, 10 parts of acrylic acid, and 5 parts of acrylamide to the , air duct, thermometer, and condenser t...

Embodiment 2

[0041] The preparation of waterborne epoxy modified acrylic resin, the steps are as follows:

[0042] (1) Under the protection of nitrogen, 10 parts of oleic acid, 10 parts of oleic acid, 12 parts of linoleic acid, 25 parts of epoxy resin, 0.05 parts of triphenylphosphine, and 10 parts of butyl acetate are added to the mixture equipped with a stirrer, In the four-necked reaction flask with air guide tube, thermometer and condenser tube. Under the protection of nitrogen, the temperature was raised to 90°C for 1 hour, and then the temperature was raised to 120°C for 3 hours until the acid value of the epoxy ester resin was 6 mgKOH / g to obtain an epoxy ester resin.

[0043] (2) Under the protection of nitrogen, add 15 parts of butyl methacrylate, 4 parts of diacetone acrylamide, 25 parts of styrene, and 12 parts of methacrylic acid to the four parts equipped with stirrer, air guide tube, thermometer and condenser tube. In a reaction bottle, heat while stirring, raise the tempera...

Embodiment 3

[0046] The preparation of waterborne epoxy modified acrylic resin, the steps are as follows:

[0047] (1) Under the protection of nitrogen, 20 parts of ricinoleic acid, 25 parts of oleic acid, 30 parts of epoxy resin, 0.3 parts of cobalt chloride, and 20 parts of ethylene glycol butyl ether are added to the mixture equipped with agitator, air duct and thermometer. , into the four-necked reaction flask of the condenser tube. Under the protection of nitrogen, the temperature was raised to 95° C. for 1 h, and then the temperature was raised to 120° C. for 3 h until the acid value of the epoxy ester resin was 8 mgKOH / g to obtain an epoxy ester resin.

[0048] (2) Under nitrogen protection, add 20 parts of butyl methacrylate, 5 parts of diacetone acrylamide, 20 parts of butyl acrylate, 12 parts of lauryl acrylate, and 10 parts of acrylic acid to the , into a four-necked reaction flask with a condensing tube, heat while stirring, raise the temperature to 110°C, slowly add dropwise ...

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Abstract

The invention discloses a water-based epoxy-modified acrylic resin and a preparation method thereof. The preparation of the water-based epoxy-modified acrylic resin adopts two different cross-linking methods to form a film. First, the double bond in the unsaturated fatty acid in the resin is used Carry out oxidative self-crosslinking; secondly, use crosslinking monomers (diacetone acrylamide and adipic hydrazide) to carry out inter-segment condensation reaction, and the prepared paint film has high crosslinking density, high hardness and good salt spray resistance. The present invention overcomes the deficiency of a single type of resin, inherits the common characteristics of epoxy and acrylic resin by modifying epoxy and acrylic resin, has excellent physical and mechanical properties, high solid content and low viscosity, and the comprehensive performance of the resin reaches Best, widely used in the field of automotive anti-corrosion coatings.

Description

technical field [0001] The invention relates to the field of water-based coatings, in particular to a water-based epoxy-modified acrylic resin and a preparation method thereof. Background technique [0002] With the continuous development of our country's economy and the continuous improvement of people's consumption level, automobiles, as an important means of transportation for people, have gradually entered every family. People's requirements for the quality of cars are also constantly improving, and the appearance level of the vehicle paint film plays an important role in people's purchase of cars. As an important supporting vehicle, the auto coating industry has also made great progress. In the developed countries of automobiles, the amount of automotive coatings occupies an extremely important position in the total output of coatings. Paint manufacturers in various countries attach great importance to the development of automotive coatings to meet the development need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/02C08G59/17
CPCC08G59/1472C08G81/024
Inventor 王璐凌建雄于学亚
Owner 中山大桥化工集团有限公司
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