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Nonionic self-emulsifying waterborne epoxy resin and preparation method and application thereof

A water-based epoxy resin, non-ionic technology, applied in the direction of epoxy resin coatings, coatings, etc., can solve the problems of self-polymerization, easy ring opening of epoxy resin, and reduced storage stability

Inactive Publication Date: 2013-03-20
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cationic emulsifiers are currently used in emulsified asphalt, and anionic water-based epoxy resin emulsions cannot be mixed with this type of emulsified asphalt.
There are also reports in the literature that quaternary ammonium salts or ammonium salts are introduced into the side chains of epoxy resins to form cationic epoxy resin emulsions, but in this system, epoxy resins are easy to ring-open or self-polymerize, making their storage stability greatly improved. reduce

Method used

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  • Nonionic self-emulsifying waterborne epoxy resin and preparation method and application thereof
  • Nonionic self-emulsifying waterborne epoxy resin and preparation method and application thereof
  • Nonionic self-emulsifying waterborne epoxy resin and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation method of nonionic self-emulsifying water-based epoxy resin, comprising the following steps: adding 25 grams of 2,6-toluene diisocyanate (TDI) to a dry three-necked flask equipped with a stirring and temperature control device, 100 grams of polyethylene Glycol monomethyl ether 800, 3 grams of mass fraction is 4% acetyl chloroacetone solution, reacted at 50 DEG C for 5 hours, and the relative content of isocyanic acid value in the system drops to about 50% of the original; Oxygen resin E-44 200 grams, after stirring evenly, add 2 grams of hexa-n-butyl ditin, react at 85 ° C for two hours, the isocyanate value in the system is close to zero, the reaction is terminated, and a non-ionic self-emulsifying water-based ring is obtained. oxygen resin.

[0031] An application of the above-mentioned nonionic self-emulsifying water-based epoxy resin, that is, the preparation of water-based epoxy varnish: 100 grams of the prepared water-based epoxy resin is stirred wit...

Embodiment 2

[0040] A preparation method of nonionic self-emulsifying water-based epoxy resin, comprising the steps of: adding 25 grams of diphenylmethane diisocyanate MDI, 50 grams of polyethylene glycol monomethyl Ether 600, 2.5 grams of acetyl chloroacetone solution with a mass fraction of 4%, reacted for 2 hours at 55°C, and the relative content of the isocyanate value in the system dropped to about 50% of the original; then add epoxy resin E- 44100 grams, after stirring evenly, add 1.5 grams of tetrapropyl tin, react at 75 ° C for two hours, the isocyanate value in the system is close to zero, the reaction is terminated, and a non-ionic self-emulsifying water-based epoxy resin is obtained.

[0041] An application of the above-mentioned nonionic self-emulsifying water-based epoxy resin, that is, the preparation of water-based epoxy varnish; 100 grams of the prepared water-based epoxy resin is stirred evenly with 50 grams of epoxy resin E51, and then 150 grams of water are added , it wa...

Embodiment 3

[0049] A preparation method of nonionic self-emulsifying water-based epoxy resin, comprising the steps of: adding 20 grams of isophorone diisocyanate IPDI, 60 grams of polyethylene glycol mono Methyl ether 800, 2 grams of acetyl chloroacetone solution with a mass fraction of 4%, reacted at 45°C for 2 hours, and the relative content of isocyanic acid value in the system dropped to about 50% of the original; then add epoxy resin E to the system -44160 grams, after stirring evenly, add 2 grams of dibutyltin dilaurate, react at 80°C for two hours, the isocyanate value content in the system is close to zero, and the reaction is terminated to obtain a nonionic self-emulsifying water-based epoxy resin.

[0050] A kind of application with the above-mentioned nonionic self-emulsifying water-based epoxy resin, that is, the preparation of water-based epoxy varnish: 100 grams of the prepared water-based epoxy resin, add 100 grams of water, and use the agitator speed to be 1000 rpm. It was...

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Abstract

The invention relates to nonionic self-emulsifying waterborne epoxy resin and a preparation method and application thereof. The nonionic self-emulsifying waterborne epoxy resin is prepared by the following steps of: mixing 15 to 55 parts of diisocyanate, 70 to 150 parts of polyethylene glycol monoethylether and 4 to 10 parts of an acetyl chloride acetone solution together in parts by mass, and then reacting at 35 to 65 DEG C for 1 to 5 hours; and adding 100 to 300 parts of epoxy resin into the mixed system, adding 0.5 to 5 parts of a catalyst into the mixed system, and reacting at 40 to 85 DEG C for 1 to 5 hours after mixing. The invention also provides a method for preparing the waterborne epoxy resin into a waterborne epoxy varnish. According to the nonionic self-emulsifying waterborne epoxy resin, after a polyethylene glycol monomethyl ether chain is introduced into a segment, alkaline water or volatile organic weak monoacid is not needed to be added, so that the application range of an emulsion is wide, and the emulsion is easy to prepare; and after crosslinking curing of the emulsion, the network chain molecular weight is improved, the crosslinking density is reduced, and a formed coating film is toughened.

Description

technical field [0001] The invention relates to a nonionic self-emulsifying water-based epoxy resin and a preparation method and application thereof. Background technique [0002] Since the synthesis method of epoxy resin was invented in the 1930s, due to its unique chemical structure and excellent performance, it has been widely used in various fields of national defense and national economy as pouring, impregnating, laminating materials, adhesives, coatings, etc. sector, especially in the application of coatings has received extensive attention and application. There are many kinds of epoxy resin coatings, which are mainly divided into bisphenol A epoxy resin, alicyclic epoxy resin and non-bisphenol A epoxy resin according to the synthetic raw materials. Because bisphenol A epoxy resin has the largest output, low price and widest industrial application, it is usually referred to as epoxy resin for short. The epoxy resin mentioned in this specification mainly refers to bi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G59/14C09D163/00C09D187/00
Inventor 常刚曹瑞军房忠芳
Owner XI AN JIAOTONG UNIV
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