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Anti-corrosion composite coating for steel rail fastener elastic strips and bolt spikes and preparation method and coating method thereof

A composite coating and anti-corrosion technology, which is applied in the direction of anti-corrosion coatings, coatings, and devices for coating liquid on the surface, can solve the problems of low bonding force between anti-corrosion grease and rail substrate, low coating efficiency, and short service life. Achieve the effects of reducing the coating workload and labor intensity, good anti-corrosion effect and wide application

Active Publication Date: 2021-07-30
ZHEJIANG BAOSHENG RAILWAYNEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing anti-corrosion grease has a low bonding force with the rail matrix, is easy to fall off, has a short service life, and requires frequent maintenance; and after the grease is exposed to the sun and rain outdoors, it is very easy to secrete base oil, adhere to dust, sewage, etc. cause environmental pollution
In addition, the rails need to be manually painted with a brush every few months, the coating cost is relatively high, the coating quality is poor and the coating efficiency is low

Method used

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  • Anti-corrosion composite coating for steel rail fastener elastic strips and bolt spikes and preparation method and coating method thereof
  • Anti-corrosion composite coating for steel rail fastener elastic strips and bolt spikes and preparation method and coating method thereof
  • Anti-corrosion composite coating for steel rail fastener elastic strips and bolt spikes and preparation method and coating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Configure modified fumed silica:

[0054] Add 300ml of xylene, 14g of fumed white carbon black, 0.56g of water into a 500ml three-necked flask, stir at room temperature for 1 hour, add 2.52g of hexamethyldisilazane, heat and stir, and control the temperature at 110-130 degrees to react After 2 hours, the temperature was lowered, the xylene was evaporated under reduced pressure, the product was poured out, dried and set aside.

[0055] (2) Configure the primer:

[0056] Heat and mix 30g of α,ω-dihydroxy polydimethylsiloxane with a viscosity (25°C) of 8000cs and a hydroxyl content of 0.004mol / 100g and 5g of silicone oil 201, keep it warm at 160±10°C for 1.5 hours, then add 2g of modified resin EVA, stirred for half an hour, then added 1g of barium petroleum sulfonate, stirred for half an hour, then cooled to 50°C, added 0.5g of vinyl tributylketoximosilane, mixed for 15min, added 0.5g of methyltri Methyl ethyl ketoxime silane, add 0.05g of dibutyltin dilaurate, mix ...

Embodiment 2

[0063] Step (1) is the same as embodiment 1

[0064] (2) Configure the primer:

[0065] Heat and mix 40g of α,ω-dihydroxy polydimethylsiloxane with a viscosity (25°C) of 8000cs and a hydroxyl content of 0.004mol / 100g and 10g of silicone oil 201, keep it warm at 160±10°C for 1.5 hours, then add 5g of modified resin EVA, stirred for half an hour, then added 2g of barium petroleum sulfonate, stirred for half an hour, then cooled to 50°C, added 1g of vinyl tributylketoximosilane, mixed for 15min, added 2g of methyl tributyl ketone Oxime silane, add 0.1g dibutyltin dilaurate, mix evenly, stir for half an hour, reduce pressure for about 5 minutes, remove air bubbles, and obtain the modified silicone rubber of the primer.

[0066] (3) Configure the surface coating:

[0067] Pass N through the reactor for 30min 2 , add 13g acrylic resin, 70g n-butanol, 1g silicone defoamer, turn on the reflux device, stir and heat up to 70±10°C, add dropwise 13g acrylic resin, 1g benzoyl peroxide, ...

Embodiment 3

[0070] Step (1) is the same as embodiment 1

[0071] (2) Configure the primer:

[0072] Heat and mix 50g of α,ω-dihydroxy polydimethylsiloxane with a viscosity (25°C) of 8000cs and a hydroxyl content of 0.004mol / 100g and 15g of silicone oil 201, keep it warm at 160±10°C for 1.5 hours, then add 7g of modified resin EVA, stirred for half an hour, then added 5g of barium petroleum sulfonate, stirred for half an hour, then cooled to 50°C, added 1g of vinyl tributylketoximosilane, mixed for 15min, added 3g of methyl tributyl ketone Oxime-based silane, add 0.2g dibutyltin dilaurate, mix evenly, stir for half an hour, reduce pressure for about 5 minutes, remove air bubbles, and obtain the modified silicone rubber of the primer.

[0073] (3) Configure the surface coating:

[0074] Pass N through the reactor for 30min 2 , add 15g acrylic resin, 80g n-butanol, 1g silicone defoamer, turn on the reflux device, stir and heat up to 70±10°C, add dropwise 15g acrylic resin, 1g benzoyl pero...

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PUM

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Abstract

The invention discloses an anti-corrosion composite coating for steel rail fastener elastic strips and bolt spikes and a preparation method and a coating method thereof. The composite coating comprises a bottom layer and a surface layer, wherein the bottom layer is modified silicone rubber, and the surface layer is fluorine-silicone-modified acrylic resin. The preparation method comprises the following steps: (1) preparing a bottom layer coating: heating and mixing the base rubber, the plasticizer and the filler, adding the modified resin and the antirust agent, performing stirring and cooling, and sequentially adding the cross-linking agent and the catalyst to obtain the modified silicone rubber; and (2) preparing a surface layer coating: the fluorine-silicon-modified acrylic resin is prepared by carrying out silicon modification on acrylic resin and then carrying out fluorine modification on the acrylic resin. The coating method is rusty coating. The coating is coated with two layers of materials; the bottom layer achieves anti-corrosion performance, and the adhesive force with the surface of the steel rail is improved; the surface layer realizes hydrophobic self-cleaning and anti-ultraviolet performance of the surface of the coating; the bottom layer and the surface layer are compatible, have layered migration performance, can be firmly attached to the surface of the track and are good in anti-corrosion effect; and the coating process is simple, and the coating workload is reduced.

Description

technical field [0001] The invention belongs to the field of anti-corrosion, and in particular relates to an anti-corrosion composite paint used for rail fastener clips and bolt spikes, a preparation method and a coating method thereof. Background technique [0002] Rail waists and fasteners work in harsh environments and are corroded by various corrosive factors, which are extremely prone to damage and destruction. And once the rail network is corroded, the damage spreads quickly, and the rail network will suffer irreversible damage. According to the survey, the standard for the use of rail network materials is 10 years, but due to corrosion, the service life is reduced by half. Especially with the rapid development of my country's high-speed railways, more and more rails are laid, the average daily corrosion figures are astonishing, and the corrosion problem of rails is becoming more and more serious. For steel bridge railway anti-corrosion, the anti-corrosion materials ...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D5/08C09D7/62C09D7/63C09D4/06C09D4/02B05D7/14B05D7/24B05D7/00
CPCC09D183/04C09D5/08C09D7/62C09D7/70C09D7/63C09D4/06B05D7/14B05D7/24B05D7/54B05D2202/10B05D2518/10B05D2502/005C08L23/0853C08K9/06C08K7/26C08K5/5465
Inventor 胡萍黄樟华李国苗李林峰陈国防黄坤许乐
Owner ZHEJIANG BAOSHENG RAILWAYNEW MATERIALS TECH
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