Water-borne epoxy resin emulsion, anticorrosive paint and preparing method thereof
A water-based epoxy resin and anti-corrosion coating technology, used in anti-corrosion coatings, coatings, etc., can solve the problems of coagulation, uneven curing, poor storage stability, etc., and achieve simple production process, excellent workability, and excellent adhesion. Effect
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preparation example Construction
[0082] The preparation method of the above-mentioned emulsion can be achieved by reacting epoxy resin and methoxy poly(oxyethylene / oxypropylene)-2-propylamine in the solution, and the temperature is preferably in the range of 50-70°C, so as to realize that it cannot be directly dissolved in water. The epoxy resin is "hydrophilic" bridged with methoxypoly(oxyethylene / oxypropylene)-2-propylamine, using -COOH, -OH at one end of the epoxy resin and methoxypoly(oxyethylene / oxypropylene) )-2-propylamine reaction, one end generates a salt, and the other end of methoxy poly(oxyethylene / oxypropylene)-2-propylamine contains a large number of hydrophilic groups, so that the original water-insoluble epoxy resin can be very good soluble in water.
[0083] After the reaction is completed, it is mixed with defoamer, neutralizer, and deionized water to prepare a modified epoxy resin emulsion, preferably using a phase inversion emulsification method. First, a W / O type emulsion can be obtained...
Embodiment 1~7
[0124] Examples 1-7 This example is used to illustrate the preparation of different modified epoxy resin emulsions
[0125] The raw materials are as follows:
[0126] Epoxy 128 (E51), Nan Ya Epoxy Resin
[0127] Methoxy poly(EO / PO)-2-propylamine adopts the following different A components and B components and their combinations:
[0128] A component:
[0129] ; Among them, x=6, y=35;
[0130] B component:
[0131] ; Among them, x=6, y=35;
[0132] Table 1: Weight ratio of component A to component B of methoxy poly(EO / PO)-2-propylamine in each example
[0133]
[0134] Defoamer (2550 BASF)
[0135] Neutralizer (DMAE Haimingsi Chemical)
[0136] Mixed solvent (ethylene glycol monobutyl ether: ethylene glycol: acetone = 40: 40: 20)
[0137] Table 2: Example 1-Example 7 Waterborne Epoxy Resin Emulsion Formula Ratio (weight percent)
[0138]
[0139] Preparation:
[0140] Step 1, mix the epoxy resin and solvent, heat up to 60°C, and stir well;
[0141] Step 2: Ad...
Embodiment 8
[0143] Embodiment 8 waterborne epoxy zinc-rich primer formula
[0144] The first component: water-based epoxy resin emulsion (the emulsion prepared in the above-mentioned Examples 1-7)
[0145] The raw materials for the second component are as follows:
[0146] High-purity zinc powder (500 mesh high-purity zinc powder Jiangsu Kecheng Zinc Industry)
[0147] Water-based zinc phosphate (PZ04 Huanqi Chemical)
[0148] Dispersant (755W Tego)
[0149] Second defoamer (0670 US OMG)
[0150] Wetting agent (2817 American Hexion)
[0151] Corrosion inhibitor (142DA Shanghai Yingshui)
[0152] Water-based polyamide wax paste (AQH-800 Lihuaxin)
[0153] Coalescing agent (Ethylene glycol monobutyl ether American Dow)
[0154] Waterborne epoxy curing agent (EK8538-Y-68 Hexion, USA)
[0155] Anti-flash rust agent (AH10 Shanghai Yingshui)
[0156] Table 3: The second component formula ratio (weight percent) of embodiment 8
[0157]
[0158] The preparation method is:
[0159] 1...
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