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Room temperature fast-drying highly-anticorrosive two-component waterborne epoxy coating and preparation method thereof

A water-based epoxy and anti-corrosion coating technology, applied in the field of coatings, can solve the problems of decreased interlayer adhesion and anti-corrosion performance of composite coatings, inconvenient coating construction, slow drying time, etc., to achieve excellent anti-corrosion performance, fast curing speed, Good thermal stability

Active Publication Date: 2013-05-08
ZHUZHOU FEILU ADVANCED MATERIAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the prior art, water-based anti-corrosion coatings all have the disadvantages of slow drying time and low early hardness (23℃×2d film hardness is lower than HB). The construction progress is slowed down, which brings inconvenience to the coating construction. At the same time, if the primer is not dry and the topcoat is sprayed, it is very easy to cause the interlayer adhesion and anti-corrosion performance of the composite coating to decline due to the residual moisture of the primer.

Method used

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  • Room temperature fast-drying highly-anticorrosive two-component waterborne epoxy coating and preparation method thereof
  • Room temperature fast-drying highly-anticorrosive two-component waterborne epoxy coating and preparation method thereof
  • Room temperature fast-drying highly-anticorrosive two-component waterborne epoxy coating and preparation method thereof

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preparation example Construction

[0085] The present invention also provides the preparation method of above-mentioned room temperature quick-drying waterborne epoxy anticorrosion coating, comprises the following steps:

[0086] (1) Preparation method of component A:

[0087] a) Put the formula amount of liquid epoxy resin, epoxy resin reactive diluent, and co-solvent into the dispersion tank, disperse evenly at a low speed (for example, 10~20min, preferably 15min), and raise the temperature of the material liquid to 70~90°C, preferably 72 ~88°C, or 73~87°C, more preferably 75~85°C, or 76~84°C, 77~83°C, most preferably 78~82°C, or 79~81°C, for example 80°C;

[0088] b) Add the formula amount of solid epoxy resin, stir evenly after melting, and lower the temperature of the material liquid to 40~60°C, preferably 42~58°C, or 43~57°C, more preferably 45~55°C, or 46~ 54°C, 47~53°C, most preferably 48~52°C, or 49~51°C, such as 50°C;

[0089] c) High-speed stirring step b) the obtained material liquid, add the form...

Embodiment 1

[0104] A component preparation method:

[0105] Weigh 120Kg of Nanya 128 epoxy resin, 30Kg of AGE active diluent from Shanghai Resin Factory, 50Kg of propylene glycol methyl ether acetate, disperse at low speed for 15min, heat up to 80°C, then add 150Kg of Yueyang Petrochemical E20 solid epoxy resin, and stir after E20 melts Evenly, cool down to 50°C, add 50Kg of 20% LS500 surfactant under high-speed stirring, then disperse at high speed for 20 minutes, filter and pack to obtain component A.

[0106] Component B: Weigh 32Kg of EH613W water-based epoxy curing agent from Cytec, 110Kg of deionized water, 5Kg of TeKgo760W dispersant from Degussa, 2.5Kg of BYK420 anti-sedimentation thixotropic agent, iron oxide red 25Kg, mica iron oxide 45Kg, zinc phosphate 30Kg, organically modified aluminum molybdenum orthophosphate zinc ( ZAM-PLUS, organically modified zinc aluminum molybdenum phosphate hydrate, Heubach GmbH (Germany) 25Kg, 800 mesh mica powder 50Kg, precipitated barium sulfat...

Embodiment 2

[0109] Preparation method of component A: Weigh 150Kg of CYD-128 epoxy resin from Yueyang Baling Petrochemical, 35Kg of AGE active diluent from Shanghai Resin Factory, 58Kg of propylene glycol methyl ether acetate, disperse at low speed for 15min, heat up to 80°C, and then add Yueyang Baling Petrochemical E20 solid epoxy resin 150Kg, after the E20 is melted, stir evenly, cool down to 50°C, add 20% LS500 surfactant 57Kg under high-speed stirring, then disperse at high speed for 20 minutes, filter and pack to obtain component A.

[0110] Preparation method of component B: Weigh 64Kg of VEH2188W water-based epoxy curing agent from Cytec, 80Kg of deionized water, 4Kg of 6208 dispersant from Cytec, 2.4Kg of BYK420 anti-sedimentation thixotropic agent, Iron oxide red 24Kg, mica iron oxide 44Kg, zinc phosphate 30Kg, organically modified aluminum molybdenum zinc orthophosphate ( ZAM-PLUS, organically modified zinc aluminum molybdenum phosphate hydrate, Heubach GmbH (Germany) 25Kg, 80...

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Abstract

The invention provides a room temperature fast-drying highly-anticorrosive two-component waterborne epoxy coating and a preparation method for the coating. The coating comprises A and B two components, wherein the A component consists of liquid epoxy resin, solid epoxy resin, an epoxy resin reactive diluent, a cosolvent, and a non-ionic surface active agent; the B component consists of a waterborne epoxy curing agent, an anticorrosive pigment, a foam killer, a corrosion inhibitor, a substrate wetting agent and de-ionized water, and during application, mass proportion of the A component to B component is 1:3-6. The coating is high in curing speed of coated film, the surface is dried in 30min at room temperature without being roasted; the coating has high early hardness, and the hardness can reach 3H in 48 hours; and in addition, the coating is good in thermal resistance stability, low in VOC (Volatile Organic Compound) content, excellent in anti-corrosion performance, and is capable of replacing a solvent type two-component epoxy coating to be applied to the anti-corrosion of a steel structure.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a room-temperature quick-drying high-corrosion two-component waterborne epoxy coating and a preparation method thereof. Background technique [0002] At present, the volatile organic compound (VOC) content of solvent-based coatings used by railway freight cars is 500-650g / L. A large amount of organic solvent volatilization during construction will bring serious harm to the environment and human health, and will also affect the production, storage, transportation and construction links. A safety hazard has been laid. Moreover, due to its low anti-corrosion performance, the salt spray resistance of alkyd resin coatings is generally not higher than 150h, and that of epoxy resin coatings is not higher than 500h. After 3 to 4 years of use, serious corrosion occurs, which can no longer meet the requirements of railway freight cars. Anti-corrosion requirements for 8-year service life. With the...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D163/02C09D5/08
Inventor 彭时贵刘雄鹰章卫国
Owner ZHUZHOU FEILU ADVANCED MATERIAL TECH CO LTD
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