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sio 2 Epoxy resin-based gradient composite wear-resistant coating and preparation method thereof

A technology of epoxy resin coating and epoxy resin, which is applied in the direction of epoxy resin coating, coating, and the device for coating liquid on the surface, etc., which can solve the problem of reduced coating bond strength, poor coating wear resistance, resin content, etc. Less problems, to achieve the effect of low cost, high bonding strength, high hardness and wear resistance

Inactive Publication Date: 2016-11-30
XIAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to improve the wear resistance of anti-corrosion coatings, people also add solid fillers to resin coatings. On the one hand, it reduces the amount of resin and reduces costs; The density is greater than that of the resin, so particles will settle at the bottom of the coating and cause the coating to delaminate. The upper part of the coating has a high resin content and basically does not contain solid fillers. The coating has poor wear resistance, while the bottom layer has a high solid content and resin The low content of the coating leads to a decrease in the bonding strength of the coating, which makes it difficult to promote the powder reinforcement technology in the anti-corrosion and wear-resistant coating. The sedimentation rate of medium filler particles, but its process is complicated, the cost is high, and it is difficult to apply in industrial production

Method used

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  • sio <sub>2</sub> Epoxy resin-based gradient composite wear-resistant coating and preparation method thereof
  • sio <sub>2</sub> Epoxy resin-based gradient composite wear-resistant coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The material selection is: two-component epoxy resin (E44 epoxy resin, low molecular weight polyamide curing agent), SiO 2 The powder particle size composition is 5-10 μm: 50%, 10-20 μm: 25%, 20-30 μm: 15%, 30-40 μm: 7%, 40-50 μm: 3%.

[0051] (1) mixed powder

[0052] Weigh SiO with different specifications according to the above ratio 2 Put the powder into a ball mill and add alcohol for ball milling. The mass ratio of alcohol to powder is 1:10. Mix the powder for 2 hours to make the powder evenly mixed. Then put the above mixed powder into a drying box for drying at a temperature of 110°C. Hold for 4 hours to remove moisture and increase the fluidity of the powder.

[0053] (2) Spraying pretreatment

[0054] The substrate is made of Q235 steel, and the sample size is 4mm×4mm×4mm. It is treated with 16-mesh corundum sand and cleaned with acetone after treatment.

[0055] (3) Epoxy resin coating deployment

[0056] Mix E-44 epoxy resin and low molecular weight pol...

Embodiment 2

[0064] The material selection is: two-component epoxy resin (E44 epoxy resin, low molecular weight polyamide curing agent), SiO 2 The particle size composition of the powder is 5-10 μm: 65%, 10-20 μm: 20%, 20-30 μm: 10%, 30-40 μm: 5%.

[0065] (1) mixed powder

[0066] Weigh SiO with different specifications according to the above ratio 2 Put the powder into a ball mill and add alcohol for ball milling. The mass ratio of alcohol to powder is 1:10. Mix the powder for 2 hours to make the powder evenly mixed. Then put the above mixed powder into a drying box for drying at a temperature of 130°C. Keep warm for 3 hours to remove moisture and increase the fluidity of the powder.

[0067] (2) Spraying pretreatment

[0068] The substrate is made of Q235 steel, and the sample size is 4mm×4mm×4mm. It is treated with 17-mesh corundum sand and cleaned with acetone after treatment.

[0069] (3) Epoxy resin coating deployment

[0070] Mix E-44 epoxy resin and low molecular weight polya...

Embodiment 3

[0078] The material selection is: two-component epoxy resin (E44 epoxy resin, low molecular weight polyamide curing agent), the particle size composition of silica powder is 5-10 μm: 35%, 10-20 μm: 30%, 20-30 μm: 20%, 30 to 40 μm: 10%, 40 to 50 μm: 5%.

[0079] (1) mixed powder

[0080] Weigh SiO with different specifications according to the above ratio 2 Put the powder into a ball mill and add alcohol for ball milling. The mass ratio of alcohol to powder is 1:10. Mix the powder for 2 hours to make the powder evenly mixed. Then put the above mixed powder into a drying box for drying at a temperature of 150°C. Keep warm for 2 hours to remove moisture and increase the fluidity of the powder.

[0081] (2) Spraying pretreatment

[0082] The substrate is made of Q235 steel, and the sample size is 4mm×4mm×4mm. It is treated with 18-mesh corundum sand and cleaned with acetone after treatment.

[0083] (3) Epoxy resin coating deployment

[0084] Mix E-44 epoxy resin and low mole...

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Abstract

SiO 2 / Epoxy resin-based gradient composite wear-resistant coating, including epoxy resin matrix and SiO 2 Reinforcement phase, where the epoxy resin matrix is ​​a two-component epoxy resin, SiO 2 The added mass of the strengthening phase is 20%-45% of the mass of the epoxy resin matrix. The invention also discloses its preparation method: cleaning the substrate surface with acetone after sandblasting and roughening treatment; painting the prepared epoxy resin coating on the pretreated substrate surface, and then applying SiO 2 Spray the mixed powder on the surface of the painted epoxy resin coating; finally keep it warm for 30-120 minutes under the condition of 25-70 ℃, and it is ready. SiO of the present invention 2 / Epoxy resin-based gradient composite wear-resistant coating, there is SiO from the surface to the inside 2 The particles gradually increase and the interface between the substrate and the coating is still a particle size gradient of pure epoxy resin, which overcomes the defects of the existing coating due to particle settlement; the composite wear-resistant coating of the present invention has higher hardness and wear resistance; The preparation process is simple and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to a SiO 2 Epoxy resin-based gradient composite wear-resistant coating, and the invention also relates to a preparation method of the wear-resistant coating. Background technique [0002] Micron SiO 2 Ceramic powder filled with modified SiO 2 / Epoxy composite materials have a series of excellent properties such as good corrosion resistance, wear resistance, insulation, large thermal conductivity, low linear expansion coefficient, small curing shrinkage rate, and low production cost. They are used in anti-corrosion and wear-resistant materials and electronic packaging. field has been widely used. [0003] At present, in order to improve the wear resistance of anti-corrosion coatings, people also add solid fillers to resin coatings. On the one hand, it reduces the amount of resin and reduces costs; The density is greater than that of the resin, so particles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/12B05D1/12B05D3/02
CPCB05D1/12B05D3/02C08K3/36C09D7/61C09D163/00
Inventor 冯拉俊沈文宁李光照杨帆罗宏
Owner XIAN UNIV OF TECH