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Preparation method and application method of water-based epoxy resin emulsion

A water-based epoxy resin and epoxy resin technology, used in coatings and other directions, can solve the problems of poor corrosion resistance, poor stability, and easy delamination of coatings, and achieve good acid and alkali resistance and good water solubility. , good stability

Active Publication Date: 2011-08-24
山东斯泰普力高新建材有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the particle size of the emulsion prepared by this method is relatively large, generally hundreds of nanometers close to microns, which makes its stability poor, easy to delaminate, and the final coating has poor anti-corrosion performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A. Preparation of Modified Epoxy Resin Emulsion

[0024] (1) Add 50g of epoxy resin E-44 and 40g (n-butanol 26.7g, ethylene glycol butyl ether 13.3g) mixed solvent into a four-necked flask equipped with a stirring device, a thermometer, a nitrogen conduit and a dropping funnel, Stir well to completely dissolve the resin.

[0025] (2) Heat to 90 o C, and slowly drop 8g methacrylic acid, 4g styrene and 3g butyl acrylate, 0.5g initiator BPO, heat up to 100 o C reacted for 4h. After the reaction was finished, the temperature was down to room temperature, slowly added dropwise N, and the N-dimethylethanolamine aqueous solution was neutralized to form a salt, so that its pH was 6.0, and 2g deionized water was added to obtain a water-based epoxy resin emulsion. The particle size of the emulsion was 218nm.

[0026] B, preparation of waterborne epoxy resin paint film

[0027] Epoxy resin emulsion and epoxy resin triethylenetetramine modified curing agent are mixed in a rati...

Embodiment 2

[0030] A. Preparation of Modified Epoxy Resin Emulsion

[0031] (1) Add 50g of epoxy resin E-44 and 40g (n-butanol 26.7g, ethylene glycol butyl ether 13.3g) mixed solvent into a four-necked flask equipped with a stirring device, a thermometer, a nitrogen conduit and a dropping funnel, Stir well to completely dissolve the resin.

[0032] (2) Heat to 100 o C, and slowly drop 9.5g methacrylic acid, 4g styrene and 2g butyl acrylate, 1g initiator peroxybenzoic acid tert-butyl, warming up to 110 o C reacted for 3h. After the reaction was finished, the temperature was down to room temperature, slowly added dropwise N, and the N-dimethylethanolamine aqueous solution was neutralized to form a salt, so that its pH was 7.0, and 2g of deionized water was added to obtain a water-based epoxy resin emulsion. The particle size of the emulsion was 40nm. .

[0033] B, preparation of waterborne epoxy resin paint film

[0034] Epoxy resin emulsion and epoxy resin triethylenetetramine modifi...

Embodiment 3

[0037] A. Preparation of Modified Epoxy Resin Emulsion

[0038] (1) Add 50g of epoxy resin E-51 and 40g (n-butanol 26.7g, ethylene glycol butyl ether 13.3g) mixed solvent into a four-necked flask equipped with a stirring device, a thermometer, a nitrogen conduit and a dropping funnel, Stir well to completely dissolve the resin.

[0039] (2) Heat to 90 o C, and slowly drop 10g methacrylic acid, 5g styrene and 4g butyl acrylate, 1g initiator azobisisobutyrate dimethyl, be warming up to 100 o C reacted for 6h. After the reaction was finished, the temperature was down to room temperature, slowly added dropwise N, and the N-dimethylethanolamine aqueous solution was neutralized to form a salt, so that its pH was 8.0, and 3g of deionized water was added to obtain a water-based epoxy resin emulsion. The particle size of the emulsion was 218nm.

[0040] B, preparation of waterborne epoxy resin paint film

[0041] Epoxy resin emulsion and epoxy resin triethylenetetramine modified c...

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Abstract

The invention relates to a preparation method and application method of a water-based epoxy resin emulsion, which comprises the following steps: (1) adding a proper amount of solvent into a bisphenol A epoxy resin, and evenly mixing; (2) heating, slowly and dropwisely adding grafted monomer and an initiator, and keeping the temperature to react; (3) at room temperature, slowly and dropwisely adding organic amine to neutralize so as to obtain salt, adding a certain amount of deionized water, and sufficiently stirring to obtain the epoxy resin emulsion; and (4) mixing the epoxy resin emulsion with a proper amount of curing agent, evenly stirring, coating a film, and curing at room temperature. The product has the main characteristics of no organic solvent volatilization and no peculiar smell in the construction process, and belongs to environment-friendly products. The construction technique of the product provided by the invention is similar to that of the traditional epoxy terrace series products. The product is applicable to the floor of various industrial factory buildings and offices, can be used in room-temperature and moist environments, and overcomes the defect that the solvent-type terrace paint is water-sensitive.

Description

technical field [0001] The invention relates to the field of organic chemical materials, in particular to a method for preparing a water-based epoxy acrylic emulsion and a method for applying it to floor coatings. Background technique [0002] In 1930, Kastan in Switzerland and Greenley in the United States synthesized epoxy resin, and industrial production began in 1947. Since then, epoxy resin has been widely used in various fields such as adhesives, coatings and composite materials due to its excellent adhesion, stability, chemical resistance, insulation and mechanical strength. [0003] At present, most of the common epoxy resin coatings are solvent-based, and most of the organic volatiles are flammable, explosive and toxic substances, which are directly discharged into the atmosphere, and will produce light smog or acid rain under ultraviolet radiation, which is harmful to the environment. Cause serious pollution; human long-term inhalation of such toxic gases can lead...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/10C08F8/44C09D151/08
Inventor 孙海翔柳云骐周欣明王伟李广志
Owner 山东斯泰普力高新建材有限公司
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