Epoxy modified high-temperature-resistant anticorrosive paint

An anti-corrosion coating and epoxy modification technology, applied in the field of coatings, can solve the problems of high dosage, unsightly surface, low temperature resistance, etc. Good heat exchange performance

Inactive Publication Date: 2011-01-05
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the anti-corrosion treatment of the exhaust system of large-scale ship diesel engine and the surface of the superstructure connected with it still mainly adopts high-temperature resistant putty; its disadvantages are that the surface is not beautiful, the amount is large, and the thickness is large, which is inconvenient for the construction and maintenance of complex piping structure putty , and the anti-corrosion period of putty is limited, and the maintenance workload is heavy
Existing high-temperature-resistant anti-corrosion coatings need to be cured at high temperatures of 150-200°C, and their temperature-resistant temperatures are low, and can only withstand high temperatures of 200-300°C; and their alternating performance of cold and heat is poor, so they cannot be used in harsh high-temperature corrosive environments

Method used

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  • Epoxy modified high-temperature-resistant anticorrosive paint
  • Epoxy modified high-temperature-resistant anticorrosive paint
  • Epoxy modified high-temperature-resistant anticorrosive paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Pour 25g of E-44 type epoxy resin and 50g of 665 type silicone resin into a three-necked bottle equipped with a condensing device and a stirrer, start stirring, and after mixing evenly, add 2~3g of coupling agent KH-560 of resin system quality, Then add the catalyst DBTDL with 1-2% of the mass of the coupling agent and raise the temperature to 120-130°C, and react at a constant temperature for 6 hours under constant stirring to prepare the base material for high-temperature resistant anti-corrosion coatings.

[0016] Add 100g of titanium dioxide, 30g of white carbon black, 10g of talcum powder and 5g of chromium trioxide that have been ball-milled through a 300-mesh sieve to the resin base prepared above, and add a solvent with a mass fraction of 5-20% of the system Xylene makes it moderately viscous and suitable for brushing. Add 3% dispersant of pigment and filler mass, 2% defoamer of resin matrix mass, 3% system mass anti-crater leveling agent and 5% system mass adhe...

Embodiment 2

[0019] Pour 25g of E-44 type epoxy resin and 75g of 665 type silicone resin into a three-necked bottle equipped with a condensing device and a stirrer, and prepare a base material for a high temperature resistant anti-corrosion coating according to the method in Example 1.

[0020] Add 150g of titanium dioxide, 40g of white carbon black, 20g of talcum powder and 10g of chromium trioxide that have been ball-milled and passed through a 300-mesh sieve to the above-prepared resin base, and add a solvent with a mass fraction of 5-20% of the system Xylene makes it moderately viscous and suitable for brushing. Add 3% dispersant of pigment and filler mass, 2% defoamer of resin matrix mass, 3% system mass anti-crater leveling agent and 5% system mass adhesion promoter to the above mixture, and stir well evenly.

[0021] Finally, 25 g of low-molecular-weight polyamide was added as a curing agent, and cured at room temperature to form a film. The resulting coating has a temperature resi...

Embodiment 3

[0023] Pour 25g of E-44 type epoxy resin and 100g of 665 type silicone resin into a three-necked bottle equipped with a condensing device and a stirrer, start stirring, and after mixing evenly, prepare a base material for a high temperature resistant anti-corrosion coating according to the method in Example 1.

[0024] Add 180g of titanium dioxide, 50g of white carbon black, 25g of talcum powder, and 10g of chromium trioxide that have been ball-milled through a 300-mesh sieve to the resin base prepared above, and add a solvent with a mass fraction of 5-20% of the system Xylene makes it moderately viscous and suitable for brushing. Add 2% of pigment and filler mass dispersant, 1% resin matrix mass of defoamer, system mass of 2% of anti-crater leveling agent and system mass of 1% of adhesion promoter to the above mixture, and stir well.

[0025] Finally, 25 g of low-molecular-weight polyamide was added as a curing agent, and cured at room temperature to form a film. The resulti...

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Abstract

The invention discloses a high-temperature-resistant anticorrosive paint. The paint comprises a base material, a color filler, an auxiliary agent, a solvent and a curing agent, wherein the base material is prepared by mixing E-44 type epoxy resin and 665 type organic silicone resin in a mass ratio of 1 to 3, adding a coupling agent KH-560 which accounts for 2 to 3 mass percent of the resin system, adding dibutyltin dilaurate serving as a catalyst which accounts for 1 to 2 mass percent of the coupling agent and performing constant temperature reaction at the temperature of between 120 and 130 DEG C for 6 hours; and the mass ratio of the base material to the color filler to the auxiliary gent to the solvent to the curing agent is 100:120-180:3-10:2-20:10-30. The paint can be quickly cured at the normal temperature and has a heat-resistant temperature of 700 DEG C, high hot and cold alternation performance and high corrosion resistance; and a cured coating is not changed after being corroded for 60 days in salt water. The paint remains perfect in corrosion environment such as simulated seawater, acid water and alkaline water. The paint can be widely applied to the fields of chemical industry, power and energy and military and has broad application prospect and economic benefit.

Description

technical field [0001] The invention relates to a coating, in particular to an epoxy-modified high-temperature-resistant and anti-corrosion coating used for the exhaust system of a diesel engine of a large ship and the surface of superstructures connected thereto. Background technique [0002] At present, the anti-corrosion treatment of the exhaust system of large-scale ship diesel engine and the surface of the superstructure connected with it still mainly adopts high-temperature resistant putty; its disadvantages are that the surface is not beautiful, the amount is large, and the thickness is large, which is inconvenient for the construction and maintenance of complex piping structure putty , and the anti-corrosion period of putty is limited, and the maintenance workload is heavy. Existing high-temperature-resistant anti-corrosion coatings need to be cured at a high temperature of 150-200°C, and their temperature-resistant temperature is low, and they can only withstand hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D163/02C09D5/08C09D5/10
Inventor 王亦菲李景明王永寿谢征芳简科
Owner NAT UNIV OF DEFENSE TECH
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