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MPA/KH567/rGO enhanced waterborne epoxy amino baking varnish and preparation method thereof

A technology of KH567 and epoxy amino, which is applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of water resistance of the paint film, decline in corrosion resistance, small shrinkage of the paint film, and unfriendly environment. Excellent chemical corrosion resistance, small film shrinkage, good abrasion resistance

Active Publication Date: 2021-06-18
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

E-44 type epoxy resin has many advantages, such as excellent chemical corrosion resistance; excellent adhesion; small film shrinkage, high strength, good wear resistance; good water resistance, can withstand boiling water without falling off, but It is only soluble in organic solvents such as aromatic hydrocarbons and ketones, but not in water, so the commonly used E-44 epoxy resins are solvent-based, and organic solvents have many disadvantages, including toxicity, unfriendly environment, easy Inflammable, explosive, etc., so in recent years many areas have promulgated regulations to control volatile organic compounds (voc), and the preparation of waterborne epoxy has attracted more and more attention.
However, due to the introduction of some hydrophilic and highly polar groups into water-based paints, the water resistance and corrosion resistance of the paint film have declined. How to prepare water-based epoxy baking paint without affecting its use effect as much as possible has become the focus of research in recent years

Method used

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  • MPA/KH567/rGO enhanced waterborne epoxy amino baking varnish and preparation method thereof
  • MPA/KH567/rGO enhanced waterborne epoxy amino baking varnish and preparation method thereof
  • MPA/KH567/rGO enhanced waterborne epoxy amino baking varnish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of GO by modified Hummers method:

[0040] Assemble a 250 ml reaction bottle in an ice-water bath, mix 2 parts of graphite powder and 2 parts of sodium nitrate with 30 parts of concentrated sulfuric acid and 15 parts of concentrated nitric acid, and then add 8 parts of potassium permanganate several times, and control the temperature not to exceed After stirring for a period of time at 5°C, the ice bath was removed and cooled to room temperature, and the reaction bottle was transferred to an electromagnetic water bath, and the electromagnetic stirring was continued for 24 h. After that, 100 parts of deionized water was slowly added, and the temperature was raised to about 98 degrees Celsius. After stirring for 20 min, an appropriate amount of hydrogen peroxide was added to reduce the residual oxidant, and the solution turned bright yellow. The graphite oxide suspension was then centrifuged at 5000 r / pm, washed with deionized water until the separated liq...

Embodiment 2

[0051] (1) Preparation of GO by modified Hummers method:

[0052] Assemble a 250 ml reaction bottle in an ice-water bath, mix 3 parts of graphite powder and 2 parts of sodium nitrate with 40 parts of concentrated sulfuric acid and 20 parts of concentrated nitric acid, and then add 10 parts of potassium permanganate several times, and control the temperature not to exceed After stirring for a period of time at 5°C, the ice bath was removed and cooled to room temperature, and the reaction bottle was transferred to an electromagnetic water bath, and the electromagnetic stirring was continued for 24 h. After that, 100 parts of deionized water was slowly added, and the temperature was raised to about 98 degrees Celsius. After stirring for 20 min, an appropriate amount of hydrogen peroxide was added to reduce the residual oxidant, and the solution turned bright yellow. The graphite oxide suspension was then centrifuged at 5000 r / pm, washed with deionized water until the separated li...

Embodiment 3

[0063] (1) Preparation of GO by modified Hummers method:

[0064] Assemble a 250 ml reaction bottle in an ice-water bath, mix 2 parts of graphite powder and 2 parts of sodium nitrate with 30 parts of concentrated sulfuric acid and 10 parts of concentrated nitric acid, and then add 8 parts of potassium permanganate several times, and control the temperature not to exceed After stirring for a period of time at 5°C, the ice bath was removed and cooled to room temperature, and the reaction bottle was transferred to an electromagnetic water bath, and the electromagnetic stirring was continued for 24 h. After that, 100 parts of deionized water was slowly added, and the temperature was raised to about 98 degrees Celsius. After stirring for 20 min, an appropriate amount of hydrogen peroxide was added to reduce the residual oxidant, and the solution turned bright yellow. The graphite oxide suspension was then centrifuged at 5000 r / pm, washed with deionized water until the separated liq...

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Abstract

The invention discloses MPA / KH567 / GO enhanced waterborne epoxy amino baking varnish and a preparation method thereof. The method comprises the following steps that: GO is prepared by using a modified Hummers method, and is modified by using a coupling agent KH567 and 3-mercaptopropionic acid, and silicon hydroxyl is introduced at the same time to leave a space for subsequent performance improvement; oo surfactant or dispersing agent is added, and the reinforcing agent modified rGO is dispersed in the waterborne epoxy emulsion by using an improved phase inversion method; a waterborne epoxy emulsifier is prepared by reacting N,N-methylene bisacrylamide, hydroxyethyl acrylate and epoxy resin E-44; the MPA / KH567 / rGO enhanced waterborne epoxy amino baking varnish is obtained by uniformly mixing epoxy equivalent in the waterborne epoxy emulsion and reactive hydrogen equivalent in an amino curing agent according to a ratio of 1: 1. The baking vanish has a certain practical application value.

Description

technical field [0001] The invention relates to the field of water-based epoxy baking varnish, in particular to MPA / KH567 / rGO enhanced water-based epoxy amino baking varnish and a preparation method thereof. Background technique [0002] Epoxy resin is a thermosetting resin with excellent performance. It has good metal adhesion, corrosion resistance and excellent physical and chemical properties. It is widely used in the fields of electronics, machinery, construction, machinery, coatings and advanced composite materials. E-44 type epoxy resin has many advantages, such as excellent chemical corrosion resistance; excellent adhesion; small film shrinkage, high strength, good wear resistance; good water resistance, can withstand boiling water without falling off, but It is only soluble in organic solvents such as aromatic hydrocarbons and ketones, but not in water, so the commonly used E-44 epoxy resins are solvent-based, and organic solvents have many disadvantages, including t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D161/20C09D5/08C09D7/62C09D7/65C08F283/10C08F220/20
CPCC09D163/00C09D161/20C09D5/08C09D7/62C09D7/65C08F283/105C08L2201/08C08L61/20C08L51/08C08K9/04C08K9/06C08K3/042C08F220/20
Inventor 郑玉婴曾汉啸
Owner FUZHOU UNIV
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