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Bi-component polyurethane coating with low infrared emissivity and preparation method thereof

A two-component polyurethane, low-infrared emission technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of physical and mechanical properties that are difficult to meet the requirements, high infrared emission rate, low infrared emission rate, etc., to achieve infrared Good stealth performance, excellent comprehensive performance, good physical and mechanical performance

Active Publication Date: 2012-10-17
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the physical and mechanical properties of the existing low-infrared emissivity film-forming materials are difficult to meet the requirements, and the infrared emissivity of the film-forming materials that meet the requirements of physical and mechanical properties is high. Therefore, the film-forming materials with high infrared emissivity are selected. Substances, the method of adding fillers and changing the coating process to obtain a lower infrared emissivity coating has become a new type of important means

Method used

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  • Bi-component polyurethane coating with low infrared emissivity and preparation method thereof
  • Bi-component polyurethane coating with low infrared emissivity and preparation method thereof
  • Bi-component polyurethane coating with low infrared emissivity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A two-component polyurethane coating with low infrared emissivity is prepared from the following materials in parts by weight:

[0030] Hydroxy acrylic resin 91.7

[0031] Melamine formaldehyde resin 8.3

[0032] Flake flake aluminum powder 5

[0033] Titanium dioxide 16.7

[0034] Acrylic Paint Thinner 75

[0035] Leveling agent 1.55

[0036] Defoamer 1.55

[0037] HDI biuret curing agent 33.3.

[0038] During preparation: mix the hydroxy acrylic resin and melamine formaldehyde resin in the above weight parts evenly, then add diluent, leveling agent, defoamer and titanium dioxide, and mix evenly; then add floating flake aluminum powder, stir evenly; finally Add HDI biuret curing agent and mix evenly to prepare the coating.

[0039] After that, spray the prepared paint on a clean tinplate sheet with a spray gun, and after the coating is surface-dry (6 hours), place it in an oven for 12 hours at 60-70°C to obtain a coating.

[0040] The properties of the coating ...

Embodiment 2

[0043] A two-component polyurethane coating with low infrared emissivity is prepared from the following materials in parts by weight:

[0044] Hydroxy acrylic resin 91.7

[0045] Melamine formaldehyde resin 8.3

[0046] Flake flake aluminum powder 5

[0047] Titanium dioxide 15.7

[0048] Acrylic Paint Thinner 75

[0049] Leveling agent 1.55

[0050] Defoamer 1.55

[0051] HDI biuret curing agent 33.3.

[0052] When preparing, mix the hydroxyacrylic resin and melamine formaldehyde resin in the above weight parts evenly, then add acrylic paint thinner, leveling agent, defoamer and titanium dioxide, and mix evenly; then add floating flake aluminum powder, and stir evenly ; Finally, add HDI biuret curing agent and mix evenly to obtain the coating.

[0053] Afterwards, the prepared paint is sprayed on a clean tinplate sheet with a spray gun. After the surface of the coating is dry (6 hours), then place it in an oven at 60-70°C for 12 hours to obtain a coating.

[0054] Th...

Embodiment 3

[0057] A two-component polyurethane coating with low infrared emissivity is prepared from the following materials in parts by weight:

[0058] Hydroxy acrylic resin 91.7

[0059] Melamine formaldehyde resin 8.3

[0060] Flake flake aluminum powder 15

[0061] Titanium dioxide 13.7

[0062] Acrylic Paint Thinner 75

[0063] Leveling agent 1.55

[0064] Defoamer 1.55

[0065] HDI biuret curing agent 33.3.

[0066] When preparing, mix the above-mentioned hydroxy acrylic resin and melamine formaldehyde resin in the above weight parts evenly, then add acrylic paint thinner, leveling agent, defoamer and titanium dioxide, and mix evenly; then add floating flake aluminum powder , and stir evenly; finally add HDI biuret curing agent, mix evenly, and the coating is prepared.

[0067] Afterwards, the prepared paint is sprayed on a clean tinplate sheet with a spray gun. After the surface of the coating is dry (6 hours), then place it in an oven at 60-70°C for 12 hours to obtain a ...

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Abstract

The invention discloses a bi-component polyurethane coating with low infrared emissivity and a preparation method thereof, relating to coatings with low infrared emissivity. The bi-component polyurethane coating with low infrared emissivity is prepared from the following raw materials by weight: 91.7 of hydroxy acrylic resin, 8.3 of terpolycyantoamino-formaldehyde resin, 5 to 15 of floatable flake aluminum powder, 13.7 to 16.7 of titanium dioxide, 75 of acrylic paint thinner, 1.55 of a levelling agent, 1.55 of an antifoaming agent and 33.3 of an HDI biuret curing agent. The bi-component polyurethane coating prepared in the invention has a good color, good flowing performance and good infrared stealth performance; usage amount of metal powder in the coating is substantially reduced; and the coating has excellent comprehensive properties and is a low-infrared-emissivity coating satisfying practical needs.

Description

technical field [0001] The invention relates to a low-infrared emissivity paint, in particular to a low-infrared emissivity two-component polyurethane paint and a preparation method thereof. Background technique [0002] Infrared stealth coating materials are mainly aimed at the reconnaissance of infrared thermal imaging cameras, aiming to reduce the brightness of targets in the infrared band, cover up or deform the shape of targets in infrared thermal imaging cameras, and reduce the probability of being discovered and identified. [0003] Low infrared emissivity coating is an important infrared stealth material. Its performance mainly depends on the film-forming substances, fillers and coating process of the coating. How to choose film-forming substances and fillers directly affects the performance of infrared stealth coatings. The low emissivity of infrared stealth paint is a comprehensive reflection of film-forming substances and fillers, which requires the fillers to hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/16C09D175/10C09D7/12C08G18/79C08G18/67
Inventor 刘亚青酒红芳李正浩赵贵哲柳学义
Owner ZHONGBEI UNIV
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