A kind of mpa/kh567/rgo strengthens waterborne epoxy amino stoving varnish and preparation method thereof
A KH567, epoxy amino technology, used in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of small shrinkage, explosiveness and flammability of the paint film, and achieve the reduction of polar group content and strong Good emulsifying ability and compatibility
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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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