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SiO2/epoxy resin-based gradient composite wear-resistant coating and preparation method thereof

A technology of epoxy resin matrix and epoxy resin coating, 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, Low content and other issues, to achieve the effect of low cost, high bonding strength, high hardness and wear resistance

Inactive Publication Date: 2015-07-08
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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  • SiO2/epoxy resin-based gradient composite wear-resistant coating and preparation method thereof
  • SiO2/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

The invention discloses a SiO2 / epoxy resin-based gradient composite wear-resistant coating. The SiO2 / epoxy resin-based gradient composite wear-resistant coating comprises an epoxy resin matrix and a SiO2 reinforced phase. The epoxy resin matrix is double-component epoxy resin. A mass ratio of the used SiO2 reinforced phase to the epoxy resin matrix is in a range of 20-45%. The invention also discloses a preparation method of the SiO2 / epoxy resin-based gradient composite wear-resistant coating. The preparation method comprises carrying out sand-blasting roughening treatment on the surface of the matrix, carrying out cleaning by acetone, coating the surface of the pretreated matrix with prepared epoxy resin coating by a brusher, spray-coating the surface of the epoxy resin coating with SiO2 mixed powder, and carrying out thermal insulation at a temperature of 25-70 DEG C for 30-120min. The SiO2 / epoxy resin-based gradient composite wear-resistant coating has gradually increased SiO2 particle sizes from surface to inside, has pure epoxy resin granularity gradient at the interface of the matrix and the coating, solves the problem that the existing coating has defects caused by particle settlement, and has high hardness and wear resistance. The preparation method has simple processes and a low cost.

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 Applications(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