Waterborne epoxy heavy anti-corrosion coating and preparation method thereof

A technology for anti-corrosion coatings and water-based epoxy emulsions, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc. Coating and substrate adhesion and other issues, to achieve the effect of improving hardness and corrosion resistance, increasing glass transition temperature, and improving heat resistance

Active Publication Date: 2019-12-24
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, due to the high surface tension of water, the wettability of water-based epoxy coatings to steel is poor, and problems such as shrinkage cavities and poor adhesion are prone to occur
Secondly, in the process of preparing water-based epoxy emulsion, a large number of hydrophilic groups are usually introduced into the resin segment, which will greatly reduce the cross-linking density of the water-based epoxy coating, thereby affecting the relationship between the coating and the substrate. Adhesion between
At the same time, the introduction of a large number of hydrophilic groups and the reduction of crosslinking density will lead to a decrease in the corrosion resistance of the coating.

Method used

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  • Waterborne epoxy heavy anti-corrosion coating and preparation method thereof
  • Waterborne epoxy heavy anti-corrosion coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] The steps of the manufacturing method of the waterborne epoxy heavy-duty anticorrosive coating of this embodiment are as follows, and the proportion of each component is parts by weight:

[0097] Step (1): Put 0.6 parts of barium sulfate, 0.5 parts of talc powder, 0.25 parts of iron red, 0.2 parts of aluminum tripolyphosphate and 0.003 parts of fumed silica in a 150℃ high temperature box to heat and remove water 12 Hours to obtain paint pigments and fillers;

[0098] Step (2): Mix 0.2 parts of deionized water, 0.02 parts of defoamer, 0.015 parts of dispersant, 0.015 parts of leveling agent, 0.05 parts of anti-flash rust agent, and 0.05 parts of bactericide and stir at room temperature. Under the circumstances, add paint pigments and fillers and 0.005 parts of modified graphene, continue to stir at high speed for 30-40 minutes to make the components uniformly dispersed, and then grind with a grinder for 0.5-1 hour to obtain a water slurry;

[0099] Step (3): Mix 1 part of the ...

Embodiment 2

[0106] The steps of the manufacturing method of the waterborne epoxy heavy-duty anticorrosive coating of this embodiment are as follows, and the proportion of each component is parts by weight:

[0107] Step (1), place 0.6 parts of barium sulfate, 0.4 parts of talc powder, 0.3 parts of iron red, 0.2 parts of aluminum tripolyphosphate and 0.004 parts of fumed silica in a 150℃ high temperature box to heat and remove water 12 Hours to obtain paint pigments and fillers;

[0108] Step (2): Mix 0.2 parts of deionized water, 0.02 parts of defoamer, 0.015 parts of dispersant, 0.015 parts of leveling agent, 0.05 parts of anti-flash rust agent, and 0.05 parts of bactericide and stir at room temperature. Under the circumstances, add paint pigments and fillers and 0.005 parts of modified graphene, continue to stir at high speed for 30-40 minutes to make the components uniformly dispersed, and then grind with a grinder for 0.5-1 hour to obtain a water slurry;

[0109] Step (3): Mix 1 part of the...

Embodiment 3

[0116] A waterborne epoxy heavy-duty anticorrosive coating, comprising a first component and a second component, in parts by weight, the first component includes:

[0117] Modified waterborne epoxy emulsion 1 part

[0118] 0.1 part of deionized water

[0119] 0.005 parts of modified graphene

[0120] 0.45 parts of barium sulfate

[0121] 0.3 parts of talc

[0122] Iron red 0.25 parts

[0123] 0.1 part of aluminum tripolyphosphate

[0124] 0.003 parts of fumed silica.

[0125] 0.02 parts of defoamer

[0126] Dispersant 0.01 parts

[0127] 0.01 part of leveling agent

[0128] Anti-flash rust agent 0.03 parts

[0129] Fungicide 0.03 parts

[0130] 0.01 part of thickener,

[0131] The second component includes:

[0132] 1 part of water-based epoxy amine curing agent

[0133] 0.2 parts of film-forming assistant,

[0134] The weight ratio of the first component to the second component is 1:0.09,

[0135] The preparation method of the modified aqueous epoxy emulsion includes:

[0136] Mix maleic anhydride an...

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Abstract

The invention relates to waterborne epoxy heavy anti-corrosion coating and a preparation method thereof. The invention belongs to the technical field of anticorrosive coating. The coating comprises afirst component and a second component, wherein the first component comprises, by weight, 1 part of a modified waterborne epoxy emulsion, 0.1 to 0.3 part of deionized water, 0.005 to 0.01 part of modified graphene, 1.15 to 1.56 parts of a pigment filler, 0.02 to 0.03 part of a defoaming agent, 0.01 to 0.02 part of a dispersing agent, 0.01 to 0.02 part of a leveling agent, 0.03 to 0.05 part of an anti-flash-rust agent, 0.03 to 0.05 part of a sterilizing agent and 0.01 to 0.05 part of a thickening agent. The coating has good physical and chemical properties, coatings can resist to 1-degree bending without cracks, the impact resistance is 50 cm, the adhesive force is larger than or equal to 10 MPa, and coatings can resist a 5% NaOH solution, a 5% H2SO4 solution and 5% NaCl for 30 days under the normal temperature condition without blistering, cracking and falling off.

Description

Technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and specifically relates to a water-based epoxy heavy-duty anti-corrosion coating and a preparation method thereof. Background technique [0002] With the continuous strengthening of people's awareness of environmental protection, more and more attention has been paid to the development and use of environmentally friendly coatings. Water-based anti-corrosion coatings is a major development trend in the coating industry today, and the country is also vigorously promoting the development of water-based coatings. Compared with solvent-based coatings, water-based coatings greatly reduce the VOC content, and even reduce the VOC content to zero, which is a true "green" coating. [0003] Waterborne epoxy coatings are widely used because of their good handling properties, good adhesion to most substrates, and can be cured in room temperature and humid environments, but they also have defects. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D163/10C09D5/08C09D7/61
CPCC08K2003/2272C08K2003/3045C08K2003/327C08L2205/02C09D5/08C09D5/084C09D163/00C09D7/61C08L63/10C08K13/06C08K9/02C08K9/04C08K3/042C08K3/30C08K3/34C08K3/22C08K3/32C08K3/36
Inventor 石家烽郭晓军崔灿灿韩忠智王磊丁超李石孙肇兴刘杨宇刘本华段绍明
Owner BC P INC CHINA NAT PETROLEUM CORP
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