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Waterborne epoxy emulsifier and preparation method thereof as well as waterborne epoxy resin dispersion and preparation method thereof

A water-based epoxy resin, water-based epoxy technology, used in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the complex production process of water-based epoxy emulsifiers, the lack of pot life and resistance of water-based epoxy resin dispersions , poor performance and other problems, to achieve the effect of low cost, low production cost and simple composition

Pending Publication Date: 2022-05-17
GUANGDONG YINYANG ENVIRONMENT FRIENDLY NEW MATERIALS CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a water-based epoxy emulsifier and a preparation method thereof, a water-based epoxy resin dispersion and a preparation method thereof, aiming at solving the problem of water-based epoxy emulsification in the prior art. complex production process, poor performance, and insufficient pot life and tolerance of waterborne epoxy resin dispersions

Method used

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  • Waterborne epoxy emulsifier and preparation method thereof as well as waterborne epoxy resin dispersion and preparation method thereof
  • Waterborne epoxy emulsifier and preparation method thereof as well as waterborne epoxy resin dispersion and preparation method thereof

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preparation example Construction

[0033] A method for preparing a water-based epoxy emulsifier, which is used to prepare the above-mentioned water-based epoxy emulsifier, comprising the following steps: adding polyether polyol to a reaction device, heating to 60°C-80°C, feeding nitrogen, stirring, and then Raise the temperature to 110°C-120°C, and perform vacuum pumping; when the temperature rises to 110°C-120°C, and the vacuum degree reaches -100kPa, start timing, after 1-3 hours of vacuuming, turn off the vacuuming, add acid anhydride, when the acid anhydride After uniform dispersion, the temperature is raised to 150°C to 180°C, and the reaction is continued for 2-4 hours to obtain a water-based epoxy emulsifier.

[0034] A water-based epoxy resin dispersion, calculated in parts by weight, comprising the following components: 60-150 parts of bisphenol A, 200-300 parts of bisphenol A glycidyl ether, 0.01-0.05 parts of ethyl triphenylphosphine acetate , 40-160 parts of solvent, 250-400 parts of deionized water...

Embodiment 1

[0044] A water-based epoxy emulsifier is obtained by reacting polyether polyol and acid anhydride, the molar mass ratio of polyether polyol and acid anhydride is 1:(1.3-2.5).

[0045] Specifically, the polyether polyol includes PEG-8000 and PEG-4000; the anhydride is adipic acid.

[0046] The preparation method of above-mentioned water-based epoxy emulsifier comprises the following steps, and the following components are calculated in parts by weight:

[0047] Step A100. Add 400g of PEG-8000 and 400g of PEG-4000 to the reaction device, heat to 60°C, blow in nitrogen, and stir;

[0048] Step A200. Raise the temperature to 120°C and vacuumize; when the temperature rises to 120°C and the relative vacuum reaches -100kPa, start timing and keep for 2 hours;

[0049] Step A300. End the vacuum state, add 46g of adipic acid, heat up to 170°C after the adipic acid is uniformly dispersed, and continue to react for 2 hours to obtain a water-based epoxy emulsifier.

[0050] A water-based...

Embodiment 2

[0056] A water-based epoxy emulsifier is obtained by reacting polyether polyol and acid anhydride, the molar mass ratio of polyether polyol and acid anhydride is 1:(1.3-2.5).

[0057] Specifically, the polyether polyol includes PEG-8000 and PEG-4000; the acid anhydride is methyl hexahydrophthalic anhydride.

[0058] Step A100. Add 300g of PEG-8000 and 450g of PEG-4000 into the reaction device, heat to 60°C, blow in nitrogen, and stir;

[0059] Step A200. Raise the temperature to 120°C and vacuumize; when the temperature rises to 120°C and the relative vacuum reaches -100kPa, start timing and keep for 2 hours;

[0060] Step A300. End the vacuum state, add 55g of methyl hexahydrophthalic anhydride, heat up to 170° C. after the methyl hexahydrophthalic anhydride is uniformly dispersed, and continue to react for 2 hours to obtain a water-based epoxy emulsifier.

[0061] A water-based epoxy resin dispersion, calculated in parts by weight, comprising the following components: 124 p...

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Abstract

The invention discloses a water-based epoxy emulsifier and a preparation method thereof, and a water-based epoxy resin dispersion and a preparation method thereof. Wherein the waterborne epoxy emulsifier is obtained by reaction of polyether polyol and anhydride, and has the advantages of high emulsification efficiency, small particle size, easiness in preparation, low cost and the like. The waterborne epoxy resin dispersion is prepared from the waterborne epoxy emulsifier, bisphenol A, bisphenol A glycidyl ether and other components, and has the advantages of large epoxy equivalent range, rapid curing, good tolerance and the like.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a water-based epoxy emulsifier and a preparation method thereof, a water-based epoxy resin dispersion and a preparation method thereof. Background technique [0002] Bisphenol A glycidyl ether-based epoxy coatings can be applied directly to metal surfaces without primer or other coatings, exhibiting excellent adhesion, high chemical resistance, and high corrosion resistance. [0003] Traditional epoxy resin coatings are solvent-based epoxy resins. Although solvent-based epoxy resins have excellent performance, they have the disadvantage of high VOC. In addition to solvent-based epoxy resins, there are more environmentally friendly water-based two-component epoxy resins on the market, but water-based epoxy resins are relatively expensive and inferior in performance to solvent-based epoxy resins. [0004] There are many methods for the preparation of waterborne epoxy resins,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/332C08J3/03C08L63/00C09D163/00C09D5/08
CPCC08G65/3322C08G65/3324C08J3/03C09D163/00C09D5/08C08J2363/00C08J2463/00
Inventor 赵志辉黄凌云刘涛
Owner GUANGDONG YINYANG ENVIRONMENT FRIENDLY NEW MATERIALS CO LTD
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