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

Active Publication Date: 2016-06-22
江拥
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the first two methods belong to the method of adding emulsifier, the latex particles formed are relatively large and unevenly distributed, wh

Method used

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  • Water-borne epoxy resin emulsion, anticorrosive paint and preparing method thereof
  • Water-borne epoxy resin emulsion, anticorrosive paint and preparing method thereof
  • Water-borne epoxy resin emulsion, anticorrosive paint and preparing method thereof

Examples

Experimental program
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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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Abstract

The invention relates to water-borne epoxy resin emulsion, anticorrosive paint and a preparing method thereof, and belongs to the technical field of paint. The water-borne epoxy resin emulsion is prepared from, by weight, 40-50% of epoxy resin, 4.3-8.7% of methoxy-poly(ethylene/ propene oxide)-2-propylamine, 4-8% of solvent, 0.1-0.3% of a defoaming agent, 0.5-1.0% of a neutralizing agent and 33-49% of deionized water. Epoxy resin and methoxy-poly(ethylene/propene oxide)-2-propylamine in the emulsion react in the solution, and epoxy resin incapable of being directly dissolved in water is grafted hydrophilically through methoxy-poly(ethylene/propene oxide)-2-propylamine. The water-borne epoxy resin paint prepared from the emulsion is excellent in constructability, corrosion resistance and chemical resistance and high in hardness, and the production technology is simple.

Description

technical field [0001] The invention relates to a water-based epoxy resin emulsion, an anti-corrosion coating and a preparation method thereof, belonging to the technical field of coatings. Background technique [0002] On August 12, 2015, after the explosion of dangerous goods in Tanggu, Tianjin, the country became stricter on dangerous chemical manufacturers, warehouses and transportation, which also further accelerated the development of the water-based paint market. At the same time, the new "Environmental Protection Law" was passed, " Consumption tax", "pollution tax", and the corresponding city's promulgation to prohibit the production and use of oil-based paints in order to control PM2.5, it can also be seen that the state indirectly supports and encourages the development of water-based paints. [0003] In anti-corrosion coatings, the epoxy system is the main one. In fact, the emulsification of water-based epoxy resin has a history of nearly 30 years in China, and ...

Claims

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Application Information

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IPC IPC(8): C08L87/00C08G81/00C08J3/03C09D187/00C09D5/10C09D5/08
CPCC08G81/00C08J3/03C08J2387/00C08K3/08C08K3/22C08K3/32C08K5/06C08K13/02C08K2003/0893C08K2003/2272C08K2003/328C08L87/005C09D5/08C09D5/106C09D187/005
Inventor 江拥
Owner 江拥
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