Graphene oxide waterborne polyurethane stone-chip-resistant anti-corrosion coating and preparation method thereof

A technology of anti-corrosion coatings and polyurethane, which is applied in the direction of polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of easy formation of coating defects and poor environmental protection of anti-corrosion coatings, and achieve excellent hydrophilicity and dispersion Equipment maintenance and operating costs, the effect of improving compactness

Inactive Publication Date: 2019-10-11
重庆绿涂腾科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a graphene oxide water-based polyurethane anti-stone chip anti-corrosion coating and a preparation method thereof, which is used to solve the problem of poor environmental protection and easy coating defects of anti-corrosion coatings in the prior art And other issues

Method used

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  • Graphene oxide waterborne polyurethane stone-chip-resistant anti-corrosion coating and preparation method thereof
  • Graphene oxide waterborne polyurethane stone-chip-resistant anti-corrosion coating and preparation method thereof
  • Graphene oxide waterborne polyurethane stone-chip-resistant anti-corrosion coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A graphene oxide water-based polyurethane anti-stone chip anticorrosion coating is prepared by the following method: (1) graphene oxide is dispersed in deionized water containing a dispersant (BYK191), and then the second neutralizing agent (trimethylamine) is added, Stirring and reacting for 1 h, the graphene oxide aqueous solution was prepared for subsequent use; wherein, the mass ratio of graphene oxide, dispersant (BYK191) and deionized water was 12:10:600; graphene oxide and the second neutralizing agent (trimethylamine ) The mass ratio is 20:1.8.

[0045] (2) Under a nitrogen atmosphere, stir and mix 20g of hexamethylene diisocyanate (HDI) and 80g of vacuum dehydrated polycarbonate diol (PCDL) 2000, react at 60°C for 2h, and measure it by the di-n-butylamine method The NCO content reaches a theoretical value of 6.63%.

[0046] (3) Add 4g of dimethylolpropionic acid (hydrophilic chain extender), drop 0.1g of dibutyltin dilaurate (catalyst), react at 70°C for 2h, a...

Embodiment 2

[0051] A kind of graphene oxide water-based polyurethane anti-stone chip anti-corrosion coating is prepared by the following method:

[0052] (1) Disperse graphene oxide in deionized water containing a dispersant (BYK190), then add a second neutralizing agent (triethylamine), stir and react for 3 hours, and prepare an aqueous solution of graphene oxide for subsequent use; wherein, graphite oxide The mass ratio of graphene, dispersant (BYK190) and deionized water is 12:8:1200; the mass ratio of graphene oxide to the second neutralizing agent (triethylamine) is 20:2.7.

[0053] (2) Under argon atmosphere, stir and mix 30g of isophorone diisocyanate (IPDI), 100g of vacuum dehydrated polyester polyol selected from polycaprolactone (PCL) 2000, react at 80°C for 3h, and use two The NCO content measured by the n-butylamine method reached a theoretical value of 5.49%.

[0054] (3) Add 3g of dimethylolpropionic acid (hydrophilic chain extender), dropwise add 0.2g of zinc carboxylate (...

Embodiment 3

[0059] A kind of graphene oxide water-based polyurethane anti-stone chip anti-corrosion coating is prepared by the following method:

[0060] (1) Disperse graphene oxide in deionized water containing a dispersant (BYK180), then add a second neutralizing agent (ammonia water), stir and react for 1.5 hours, and prepare an aqueous solution of graphene oxide for subsequent use; wherein, graphene oxide 1. The mass ratio of dispersant (BYK180) to deionized water is 12:6:2400; the mass ratio of graphene oxide to the second neutralizing agent (ammonia water) is 20:0.8.

[0061] (2) Under a helium atmosphere, stir and mix 45g HMDI, 90g vacuum-dehydrated polytrimethylene glutarate (PPG) 2000, react at 70°C for 4h, and use the di-n-butylamine method to measure the NCO content to reach a theoretical 7.87% .

[0062] (3) Add 5g of dimethylolbutyric acid (hydrophilic chain extender), dropwise add 0.2g of bismuth carboxylate (catalyst), react at 70°C for 3h, and use the di-n-butylamine meth...

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Abstract

The invention provides a graphene oxide waterborne polyurethane stone-chip-resistant anti-corrosion coating and a preparation method thereof. The coating comprises an aliphatic or alicyclic isocyanatemonomer, a polyhydric alcohol, a catalyst, a hydrophilic chain extender, a crosslinking agent, a silane coupling agent, a graphene oxide aqueous solution and a first neutralizing reagent. The preparation process of the anti-corrosion coating is simple and easy to operate, has a low equipment requirement and a short curing time, can effectively reduce the protection cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, in particular to a graphene oxide water-based polyurethane anti-stone chip anti-corrosion coating and a preparation method thereof. Background technique [0002] my country has a vast territory and long railway lines. The maximum mileage of high-speed rail vehicles is more than 4,000 kilometers per day. The environmental conditions involved are complex and changeable, and the operating conditions are harsh. In addition to corrosion, the failure of the coating of the car shell is mainly manifested as local stone damage and yellowing of the surface. The harsh operating environment requires frequent maintenance of the shell of the high-speed rail car, which greatly increases its operating costs. Polyurethane coatings have excellent wear resistance, chemical resistance, high and low temperature resistance, and high decorative properties, which can meet the needs of high-speed rail bodi...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D175/06C09D5/08C09D7/61C09D7/63
CPCC09D5/08C09D175/04C09D175/06C09D7/61C09D7/63C08K3/042C08K5/544C08K5/5435C08K5/548
Inventor 池铫吴声坤李朝龙黄晓安
Owner 重庆绿涂腾科技有限公司
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