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Water-based epoxy coating capable of being subjected to curtain coating and dip coating and preparation method thereof

A water-based epoxy coating and dip coating technology, which is applied in the field of coatings, can solve problems such as uneven surface of the coating film, easy generation of bubbles and pinholes, and easy cracking, and achieve high cross-linking density, excellent thermal stability, and extended pot life. Effect

Inactive Publication Date: 2020-01-03
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the existing water-based two-component epoxy coating adopts the coating method of flow coating and dip coating, which may easily cause the surface of the coating film to be uneven, easy to crack, and easy to generate air bubbles and pinholes, the present invention provides a method that can be sprayed and dipped Water-based epoxy coating and preparation method thereof

Method used

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  • Water-based epoxy coating capable of being subjected to curtain coating and dip coating and preparation method thereof
  • Water-based epoxy coating capable of being subjected to curtain coating and dip coating and preparation method thereof

Examples

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Embodiment 1

[0033] A water-based epoxy coating that can be sprayed and dipped, including A component and B component;

[0034] Described A component comprises the component of following mass percentage:

[0035] 22% bisphenol A type epoxy resin aqueous dispersion, 10% o-cresol novolac epoxy resin aqueous dispersion, 0.8% alcohol ester dodeca, 1.5% dispersing agent, 0.1% organomodified lithium montmorillonite Stone clay, 0.8% wetting and leveling agent, 0.4% thickener, 0.6% defoamer, 2% rutile titanium dioxide, 40% filler and 21.8% deionized water;

[0036] Described B component comprises the component of following mass percentage:

[0037] 45% water-based amine epoxy curing agent, 1% propylene glycol butyl ether and 54% deionized water;

[0038] The mass proportion of the A component and the B component is 5:1.

[0039]Wherein, bisphenol A type epoxy resin aqueous dispersion selects Hexion's Epikote 6520-WH-53A; o-cresol novolac epoxy resin aqueous dispersion selects Hexion's Epikote60...

Embodiment 2

[0046] A water-based epoxy coating that can be sprayed and dipped, including A component and B component;

[0047] Described A component comprises the component of following mass percentage:

[0048] 24% bisphenol-A type epoxy resin aqueous dispersion, 9% o-cresol novolac epoxy resin aqueous dispersion, 0.9% alcohol ester dodeca, 1.6% dispersant, 0.2% organomodified lithium montmorillonite Stone clay, 0.9% wetting and leveling agent, 0.5% thickener, 0.7% defoamer, 10% rutile titanium dioxide, 30% filler and 22.2% deionized water;

[0049] Described B component comprises the component of following mass percentage:

[0050] 50% water-based amine epoxy curing agent, 2% propylene glycol butyl ether and 48% deionized water;

[0051] The mass proportion of the A component and the B component is 6:1.

[0052] Wherein, bisphenol A type epoxy resin aqueous dispersion selects Hexion's Epikote 6520-WH-53A; o-cresol novolac epoxy resin aqueous dispersion selects Hexion's Epikote6006-W-...

Embodiment 3

[0059] A water-based epoxy coating that can be sprayed and dipped, including A component and B component;

[0060] Described A component comprises the component of following mass percentage:

[0061] 25% aqueous dispersion of bisphenol-A epoxy resin, 8% aqueous dispersion of o-cresol novolac epoxy resin, 1% alcohol ester dodeca, 1.8% dispersant, 0.2% organically modified lithium montmorillonite Stone clay, 1% wetting and leveling agent, 0.6% thickener, 0.7% defoamer, 20% rutile titanium dioxide, 20% filler and the balance deionized water;

[0062] Described B component comprises the component of following mass percentage:

[0063] 55% water-based amine epoxy curing agent, 3% propylene glycol butyl ether and 42% deionized water;

[0064] The mass proportion of the A component and the B component is 7:1.

[0065] Wherein, bisphenol A type epoxy resin aqueous dispersion selects Hexion's Epikote 6520-WH-53A; o-cresol novolac epoxy resin aqueous dispersion selects Hexion's Epiko...

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Abstract

The invention relates to the technical field of coatings, and particularly discloses a water-based epoxy coating capable of being subjected to curtain coating and dip coating and a preparation methodof the water-based epoxy coating. The water-based epoxy coating capable of being subjected to curtain coating comprises a component A and a component B, wherein the component A is prepared from bisphenol A type epoxy resin aqueous dispersion, o-cresol formaldehyde epoxy resin aqueous dispersion, a solvent, a dispersing agent, an anti-settling agent, a wetting leveling agent, a thickener, an antifoaming agent, titanium dioxide, a filler and the balance of deionized water; the component B comprises a water-based amine epoxy curing agent, an environment-friendly solvent and the balance of deionized water, wherein the mass ratio of the component A to the component B is (5-7): 1. The water-based epoxy coating disclosed by the invention is used in the shower coating and dip-coating processes ofcomplex components, and the phenomena of cracking, needle holes and bubbling are avoided.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based epoxy coating capable of flow coating and dip coating and a preparation method thereof. Background technique [0002] At present, water-based two-component epoxy anti-corrosion primers are mostly used to coat the surface of metal substrates on the market. Its anti-corrosion, anti-rust and salt spray resistance can meet the standards of solvent-based coatings. [0003] The current industrial coating of water-based two-component epoxy coatings mostly adopts spraying operations, and corresponding spraying equipment is equipped to ensure good spraying efficiency and coating effect. However, some parts with complex mechanical structures, such as heat sinks, The spacing is small, spraying and brushing cannot meet the requirements, and only the method of spraying or dipping can be used. However, the two components in the two-component epoxy system will react immediately a...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D7/61C09D7/62
CPCC08K2003/2241C08K2003/3045C08L2205/025C09D7/61C09D7/62C09D163/00C08L63/00C08K13/06C08K3/346C08K3/22C08K3/30C08K3/34
Inventor 宋利强张戈辉许旭周泽钱董立志胡中源
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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