Nano clay modified epoxy zinc-rich coating, and its preparing method
An epoxy zinc-rich coating and nano-clay technology, applied in the field of coatings, can solve the problems of difficult formation of peel-off nanocomposites and high curing reaction temperature, and achieve the effects of reduced anti-corrosion performance, low sinking, and good storage stability
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Embodiment 7-8
[0054] Embodiment 7-8 (content of different clays)
[0055] The preparation method of the montmorillonite treated by intercalation is the same as in Example 1. 30 g of intercalated montmorillonite (wherein the hexadecylamine content is 20%) was added into 90 g of E44 epoxy resin and 10 g of toluene under stirring state, and stirred for 30 minutes. Then add 500 mesh zinc powder 800g respectively. After being evenly stirred, component 1 of the nano-clay modified epoxy zinc-rich paint is prepared. Then mix with component two (50% 726 curing agent, solvent is toluene) by component one: component two=100:7, spray on the film surface, cure 20 hours respectively at 30 ℃, corresponding embodiment 7, paint The film thickness is 200±5μm; in addition, according to component 1: component 2 = 100:10, mix with component 2 (30% 726 curing agent, solvent is toluene), spray on the surface of the film, and cure at 30 ° C for 20 hours , corresponding to Example 8, the paint film thickness is ...
Embodiment 9
[0057] Add 80g of water to 20g of montmorillonite to prepare a 20% aqueous solution; then weigh 10g of octaamine to prepare an aqueous solution containing 5% of octaamine, mix the two solutions and react at 55°C for 36 hours. Centrifugal filtration, to the filtrate with 0.1NAgNO 3 Check until there is no white precipitate. After the product was dried, it was ground to 325 mesh particles.
[0058] 30 g of montmorillonite (wherein the octaamine content is 12%) intercalated according to the above method was added into 100 g of E20 epoxy resin and 300 g of cyclohexanone under stirring, and stirred for 30 minutes. Then add 500g of 500 mesh zinc powder respectively. After being evenly stirred, component 1 of the nano-clay modified epoxy zinc-rich paint is prepared. Then mix component 1: component 2 = 100:10 with component 2 (50% SW-2 curing agent, solvent is toluene), spray on the surface of the film, and cure at 40°C for 20 hours. The paint film thickness is 200±5μm.
Embodiment 10
[0060] Add 25g of montmorillonite to 75g of water to prepare a 25% aqueous solution; then weigh 10g of dodecyl ammonium chloride to prepare an aqueous solution containing 18% of dodecyl ammonium chloride, mix the two solutions and react at 85°C 3 hours. Centrifugal filtration, to the filtrate with 0.1N AgNO 3 Check until there is no white precipitate. After the product was dried, it was ground to 325 mesh particles.
[0061] 30 g of montmorillonite (wherein the content of dodecylamine is 17%) intercalated according to the above-mentioned method was added in 100 g of E20 epoxy resin and 300 g of cyclohexanone under stirring state, and stirred for 30 minutes. Then add 500g of 500 mesh zinc powder respectively. After being evenly stirred, component 1 of the nano-clay modified epoxy zinc-rich paint is prepared. Then mix component 1: component 2 = 100:10 with component 2 (50% SW-2 curing agent, solvent is toluene), spray on the surface of the film, and cure at 40°C for 20 hours...
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