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A kind of preparation method with high corrosion resistance epoxy resin coating

A technology capable of epoxy resin and composite epoxy resin, applied in improving and improving the anti-corrosion performance of epoxy resin coating, the preparation field of epoxy resin coating, can solve problems such as poor, achieve enhanced compatibility, The effect of improving anti-corrosion ability and simple process

Active Publication Date: 2020-05-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation method of an epoxy resin-nano silicon dioxide anti-corrosion coating provided by the present invention synthesizes a silane coupling agent with a new structure to modify the surface of nano silicon dioxide, thereby improving the contact between nano silicon dioxide and the environment. The problem of poor compatibility between epoxy resins, improve the anti-corrosion ability of the coating, and avoid the failure and precipitation of the coating during daily storage

Method used

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  • A kind of preparation method with high corrosion resistance epoxy resin coating
  • A kind of preparation method with high corrosion resistance epoxy resin coating
  • A kind of preparation method with high corrosion resistance epoxy resin coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation of embodiment 1 silane coupling agent 2-(3,4-epoxycyclohexyl) ethyltriethoxysilane

[0033] Weigh 5g of 1,2-epoxy-4-vinylcyclohexane, dissolve it in an appropriate amount of toluene, and add it into a 250ml three-neck flask. in N 2Under the atmosphere, add 10ppm Karstedt catalyst and raise the reaction temperature to 65°C, then add 7.24g triethoxysilane dropwise to the reaction solution, after the dropwise addition, keep stirring at 800 rpm for 6h, and the reaction product is dissolved in In toluene; after rotary distillation of toluene, the target product of 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane was obtained as a colorless transparent liquid.

[0034] figure 1 Provide the proton nuclear magnetic resonance spectrogram ( 1 H-NMR) and chemical formula. The δ0.5 appearing in the product is -CH 2 The multiplet of -Si-, 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane was successfully synthesized.

Embodiment 2

[0035] The surface modification of embodiment 2 nano silicon dioxide

[0036] Stir 10 g of silica nanoparticles in 200 ml of ethanol at a high speed at room temperature. After the silica is uniformly dispersed, the pH value of the nano silica-ethanol suspension is adjusted to 2-3 with glacial acetic acid. in N 2 Under the atmosphere, 5.4g of silane coupling agent and appropriate amount of deionized water were slowly added dropwise to the nano-silica-ethanol suspension. After the dropwise addition, the temperature was raised to 60° C. and kept under reflux for 12 hours. After the reaction, the ETEO-modified nano-silica-ethanol suspension was centrifuged several times, washed with ethanol and then dried in a vacuum oven for 48 hours to obtain the modified nano-silica particles (that is, the aforementioned "ETEO-modified nano-silica powder", labeled ETEO-SiO 2 ).

[0037] The silane coupling agent used in this example is 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane prepared in...

Embodiment 3

[0041] The preparation of embodiment 3 epoxy resin composite coatings

[0042] Add 100g of epoxy resin to an appropriate amount of n-butanol and xylene as a compound solvent, add 5g of ETEO-modified nano-silica powder, and 40-70g of polyamide curing agent and stir for 30 minutes at high speed. After the stirring is finished, the steel plate is spray-coated, and then the steel plate is put into an oven at 60° C. for curing for 4 hours, so that the coating thickness is 80-100 μm.

[0043] In the compound solvent of n-butanol and xylene, 1-3g leveling agent and 2-5g defoamer can also be added together with the curing agent.

[0044] The carbon steel substrate used in the experiment is Q235 steel plate, and the size of the steel plate after processing is: 12cm×5cm×2mm. Before use, the surface of the steel plate was cleaned with ethanol and dried in a vacuum oven.

[0045] Since the coating substrate of this experiment is epoxy resin, a compound solvent of xylene and n-butanol is...

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Abstract

The invention discloses a preparation method of an epoxy resin coating with high anticorrosion property and belongs to the technical field of anticorrosion coatings. The preparation method comprises the following steps: adopting hydrosilylation reaction to prepare 2-(3, 4-epoxy cyclohexyl) ethyltriethoxysilane (ETEO), utilizing the ETEO to carry out surface modification on nanosilicon dioxide; preparing the epoxy resin coating by adopting epoxy resin as a coating matrix, the ETEO-modified nano SiO2 as filler and polyamide (PA) as a curing agent. The preparation method disclosed by the invention has the beneficial effects that the ETEO is adopted for carrying out surface modification on the nanosilicon dioxide to lead the nanoparticles to show lipophilicity and be uniformly dispersed in theepoxy resin, so that the interfacial compatibility between the filler and the epoxy resin is improved, the shielding action is improved, simultaneously the coating is more compact, diffusion channelsof corrosive mediums are reduced, the corrosive reaction process is inhibited and further the epoxy resin coating has high anticorrosion property.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and relates to a preparation method of an epoxy resin coating added with modified nano silicon dioxide, thereby improving and improving the anti-corrosion performance of the epoxy resin coating. Background technique [0002] Carbon steel is currently the most widely used metal substrate in the world, but carbon steel is easily corroded by moisture and oxygen under atmospheric conditions, which seriously restricts its application and development. Organic coatings and metal coatings have excellent barrier properties and cathodic protection to protect carbon steel from corrosion. Among them, the excellent adhesion of epoxy resin (EP) after forming a coating is beyond the reach of other organic coatings, and it is also the most widely used anti-corrosion coating in the world. However, during the use of epoxy resin, the coating will bubble and fall off, which will affect the protectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/61C07F7/18
CPCC07F7/1804C07F7/1876C08K3/36C08K9/06C08K2201/011C09D5/08C09D163/00
Inventor 张春玲王英楠戴雪岩曲立杰
Owner JILIN UNIV
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