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Paint of aqueous epoxy resin and its preparation method

A water-based epoxy resin, epoxy resin technology, applied in the direction of epoxy resin coating, coating, latex paint, etc., can solve the problems of flammability, environmental and human hazards, toxicity, etc.

Inactive Publication Date: 2003-05-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the vast majority of epoxy resin coatings are solvent-based coatings, which contain a large amount of volatile organic compounds (VOC), which are toxic and flammable, thus causing harm to the environment and human body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Preparation of reactive emulsifier (I)

[0054] Equip the four-necked flask with a stirring device, a thermometer and a nitrogen gas conduit, and heat the flask in a water bath. Add 200 grams of polyethylene glycol (0.05mol, molecular weight 4000) and 50g of E-20 epoxy resin into the flask, and feed nitrogen to get rid of it. Air, and then heated to 70-80 ° C, and then add an appropriate amount of Lewis acid catalyst, the temperature of the reaction system rises. The reaction temperature is controlled to be 90-100° C., and the reaction is continued for 6 hours. Add 250 g of water and stir until the product is completely dissolved to obtain a water-white clear solution.

[0055] The solid content is 50%, and the viscosity is about 1000mPas.

[0056] (2) Preparation of epoxy resin emulsion

[0057] Add 200g E-51 epoxy resin in the 800ml beaker, start the disperser and stir slowly, add 60g two glycol monoethyl ethers. After the epoxy resin is completely dissolved, ...

Embodiment 2

[0085] (1) Preparation of reactive emulsifier (I)

[0086] Equip a four-necked flask with a stirring device, a thermometer, and a nitrogen gas conduit, and heat the flask in a water bath. Add 50 grams of polyethylene glycol (0.05mol, molecular weight 1000) and 50 g of E-20 epoxy resin to the flask, and feed nitrogen to get rid of it. Air, and then heated to 70-80 ° C, and then add an appropriate amount of Lewis acid catalyst, the temperature of the reaction system rises. The reaction temperature is controlled to be 90-100° C., and the reaction is continued for 6 hours. Then add 100 g of water and stir until the product is completely dissolved to obtain a water-white clear solution.

[0087] The solid content is 50%, and the viscosity is about 800mPas.

[0088] (2) Preparation of epoxy resin emulsion

[0089] Add 200g E-20 epoxy resin in the 800ml beaker, start the disperser and stir slowly, add 100g two glycol monoethyl ethers. After the epoxy resin is completely dissolved...

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Abstract

A water epoxy resin paint is composed of the epoxy resin emulsion prepared from epoxy resin through emulsifying, and the solidifying agent prepared from polyvinylpolyamine through terminating, addition and salting. Said paint is prepared by proportional mixing both components together. Its advantages are high stability and antiwear nature, high film hardness and high durability.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a high-performance two-component waterborne epoxy resin coating and a preparation method thereof. Background technique [0002] Epoxy coatings are high-performance coatings with a wide range of applications. It has many advantages, including strong adhesion with various bases, high hardness of the coating, good water and chemical resistance, good wear resistance, etc. It can be used as ground coatings, metal anti-corrosion Rust primer, marine paint, etc. However, most epoxy resin coatings are solvent-based coatings at present, which contain a large amount of volatile organic compounds (VOC), which are toxic and flammable, thus causing harm to the environment and human body. With the increasing requirements for environmental protection, there is an increasing demand for coatings that reduce VOC or even do not contain VOC. Contents of the invention [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/02C09D163/00
Inventor 顾国芳
Owner TONGJI UNIV
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