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Self-emulsifying aqueous epoxide resin paint and method for producing the same

A technology of water-based epoxy resin and epoxy resin coating, applied in the direction of epoxy resin coating, coating, latex paint, etc., can solve the problems of poor flexibility and water resistance of cured coating film, and low filling ratio of water-based epoxy resin, etc. Achieve the effect of improving hydrophilicity and brittleness, good storage stability and high adhesion

Inactive Publication Date: 2008-07-16
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide a non-ionic self-emulsifying water-based epoxy resin coating and its preparation method, to solve the problem that the filling ratio of water-based epoxy resin prepared by ionization modification technology is not high and the cured coating film is flexible. Disadvantages of poor sex and water resistance

Method used

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  • Self-emulsifying aqueous epoxide resin paint and method for producing the same
  • Self-emulsifying aqueous epoxide resin paint and method for producing the same
  • Self-emulsifying aqueous epoxide resin paint and method for producing the same

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preparation example Construction

[0029] Self-emulsifying waterborne epoxy resin coating provided by the invention, its preparation method may further comprise the steps:

[0030] a. With a molar ratio of 1:1 to 1:2 alkoxy-terminated polyether and thionyl chloride as raw materials, N,N-dimethylformamide as a catalyst, stirring and reacting at 60 to 80°C to obtain Chlorine-terminated alkoxy-terminated polyethers;

[0031] b. After mixing hydroxyphenyl fatty amine, sodium hydroxide and tetrabutylammonium bromide in a molar ratio of 1 to 2: 1.1 to 6: 0.02 to 0.08, add chlorine-terminated alkoxy polyether, and Stir and react at 60-80°C, then extract, filter and distill off the solvent to obtain α-amino-ω-alkyl polyether;

[0032] c. Use propylene glycol methyl ether with a molar ratio of 8 to 12 as a solvent, mix epoxy resin and α-amino-ω-alkyl polyether in a molar ratio of 1 to 1.5: 0.6 to 1.5, and mix them uniformly at 60 to 80 The reaction was stirred at ℃, and then the solvent was distilled off. Described h...

Embodiment 1

[0038] Add 0.1mol of polyethylene glycol monomethyl ether and 0.6ml (0.01mol) of N,N-dimethylformamide (DMF) into a 250ml three-necked flask, heat up to 40°C with an oil bath while stirring, and then 9 ml (0.12 mol) of thionyl chloride was added dropwise within 20 min, and then the stirring reaction was continued at 80° C. for 8 hours. SO produced during the reaction 2 , HCl gas is absorbed with lye. After the reaction solution was cooled, it was washed with saturated brine, the crude product was collected, dried with anhydrous potassium carbonate and adjusted to neutrality, and then the filtrate was collected by filtration to obtain chlorine-terminated polyethylene glycol monomethyl ether.

[0039] Add 0.1 mol of hydroxybenzylamine, 0.4 mol of NaOH and 0.84 g of TBAB into a 250 ml three-necked flask, stir and mix evenly at room temperature, and then add 0.1 mol of chlorine-terminated polyethylene glycol monomethyl ether. At the same time, the mixture was heated to 60° C. wi...

Embodiment 2

[0042] Add 0.1mol of polyethylene glycol monomethyl ether and 1.2ml (0.02mol) of N,N-dimethylformamide (DMF) into a 250ml three-necked flask, heat up to 40°C with an oil bath while stirring, and then 12ml (0.16mol) of thionyl chloride was added dropwise within 25min, and then the stirring reaction was continued at 60°C for 30 hours. SO produced during the reaction 2 , HCl gas is absorbed with lye. After the reaction solution was cooled, it was washed with saturated brine, the crude product was collected, dried with anhydrous potassium carbonate and adjusted to neutrality, and then the filtrate was collected by filtration to obtain chlorine-terminated polyethylene glycol monomethyl ether.

[0043]Add 0.05mol hydroxybenzylamine, 0.25mol NaOH and 0.49g TBAB into a 250ml three-necked flask, stir and mix evenly at room temperature, and then add 0.05mol of chlorine-terminated polyethylene glycol monomethyl ether. At the same time, the mixture was heated to 80° C. with an oil bath ...

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Abstract

The invention relates to a self-emulsifiable water epoxide resin coating mainly consisting of water epoxide resin and a water curing agent; wherein, the water epoxide resin is the product obtained by the reaction of epoxide resin with Alpha-amino-Omega-alkyl polyether, or can be obtained by taking the product as epoxide resin emulsifier to carry out emulsification on the low molecular weight epoxide resin by adding water. The preparation method of the coating is as follows: preparing end alkoxy polyether at a chlorine end capping which is then put into well mixed mixture of hydroxyphenyl aliphatic amine, sodium hydroxide and tetrabutylammonium bromide; stirring, extracting, filtering and distilling the mixture to remove the solvent, thus getting the end alkane oxyl polyether; taking propylene glycol methyl ether as solvent, evenly mixing the epoxide resin and the end alkane oxyl polyether, and removing the solvent by being distilled after being stirred. The self-emulsifiable water epoxide resin coating has good storage stability, no toxity, and high packing ratio of filler, can be solidified under indoor temperature, has high adhesive force, high flexibility, good water resisting property and solvent resisting property.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a self-emulsifying waterborne epoxy resin coating and a preparation method thereof. Background technique [0002] Epoxy resin coatings are widely used because of their strong adhesion, excellent chemical corrosion resistance, small shrinkage, wear resistance and good insulation. However, traditional epoxy resin coatings are solvent-based, and contain a large amount of flammable and toxic volatile organic solvents, which cause great harm to the environment and human body. In recent years, people have paid more and more attention to environmental protection. Many countries have promulgated laws and regulations to control volatile organic compounds (VOC), and the implementation standards have become stricter. The development of environmentally friendly water-based coatings is favored, and its key technology lies in the water-based treatment of epoxy resin. [0003] There are usually two me...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/02C09D5/25C09D7/12
Inventor 官建国赵立英马会茹刘培
Owner WUHAN UNIV OF TECH
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