Phase change energy storage coating for automobile cab and preparation process of phase change energy storage coating

A phase change energy storage, cab technology, applied in reflection/signal coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problem of inability to achieve effective temperature control, low phase change enthalpy, poor stain resistance, etc. The problem is to reduce the overheating problem of the car cab, improve the phase change enthalpy value, and enhance the anti-fouling performance.

Pending Publication Date: 2022-07-29
ZHEJIANG HEXIN NEW MATERIAL CO LTD +1
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AI Technical Summary

Problems solved by technology

[0004] Organic phase change materials have advantages over inorganic materials due to their low corrosion and no supercooling phenomenon. Among them, organic solid-liquid phase change materials have large phase change latent heat and are widely used. However, they are prone to leakage during the phase change process. , although the encapsulation technology solves some of the problems, the enthalpy of phase transition will decrease, making it impossible to achieve effective temperature control
[0005] Heat reflection technology is to use the material to reflect sunlight to reduce the heating effect of sunlight on the cab of the car. As a high light reflectance material, nano-titanium dioxide is widely used as a functional filler in heat reflective coatings. However, the color of the coating is highly whitish. , Poor stain resistance, not suitable for automotive cab environment
[0006] CN112280454A discloses a polyurethane heat-reflective coating, which is made of the following raw materials in weight ratio: 55-85 parts by weight of phase-change polyurethane resin, 7-15 parts by weight of nano-titanium dioxide, and 11-17 parts by weight of precipitated phase silica It can be used as a leather coating with 2 to 4 parts by weight of fumed silica. Although the phase change polyurethane is used as the matrix to solve the problem of easy leakage of the phase change, its phase change enthalpy is low (40 ~ 60J / g), and the whiteness is high. The addition of high-strength substances makes the paint's stain resistance poor
[0007] CN109530184A discloses a phase-change heat storage-reflective heat-insulating double-layer coating, including an outer coating and an inner coating. The outer coating is made of an infrared heat-reflecting coating that initiates polyacrylamide on the surface of nano-titanium dioxide kaolin composite particles. The coating is made of phase change microcapsules as the main material. Phase change microcapsules have a high phase change enthalpy, but the presence of titanium dioxide still has the problem of high whiteness

Method used

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  • Phase change energy storage coating for automobile cab and preparation process of phase change energy storage coating
  • Phase change energy storage coating for automobile cab and preparation process of phase change energy storage coating
  • Phase change energy storage coating for automobile cab and preparation process of phase change energy storage coating

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preparation example Construction

[0051] The preparation technology of the above-mentioned phase change energy storage paint for automobile cab, comprises the following steps:

[0052] 1) Stir the water-based polyol dispersion, film-forming aid, defoamer, leveling agent, and thickener evenly, then add a curing agent, and continue stirring to obtain an outer coating slurry;

[0053] 2) Stir the water-based polyol dispersion, the modified high-reflection material, the film-forming aid, the defoaming agent, the leveling agent, and the thickening agent evenly, then add the curing agent, and continue to stir to obtain the intermediate layer slurry;

[0054] 3) Stir the water-based phase-change polyurethane, film-forming aid, defoamer, leveling agent, and thickener evenly, then add a curing agent, and continue stirring to obtain an inner coating slurry;

[0055] 4) coating the inner coating slurry obtained in step 3) on the substrate, curing, then coating the intermediate layer slurry obtained in step 2), curing, an...

Embodiment 1

[0068] The present embodiment provides the preparation process of phase change energy storage paint for automobile cab, including:

[0069] Dewater 1000Da polyethylene glycol and dimethylolpropionic acid in a vacuum oven at 110°C for 4 hours, and hexamethylene diisocyanate to remove water with molecular sieve for 4 hours. Polyethylene glycol and an appropriate amount of acetone solvent were added to the reaction kettle, stirred at a high speed of 400r / min, reacted at 50°C for 4h, added 13.5g of dimethylolpropionic acid, continued to react for 2h under the action of the catalyst dibutyltin dilaurate, and added 18g of dimethylolpropionic acid. 1,4-Butanediol continued to react for 1 h, cooled to room temperature, neutralized by adding 10.1 g of triethylamine, and under high-speed stirring at 800 r / min, deionized water was added dropwise to the device for emulsification, and then distilled under reduced pressure until there was no more in the emulsion. Residual acetone yields an ...

Embodiment 2

[0076] The present embodiment provides the preparation process of phase change energy storage paint for automobile cab, including:

[0077] Dewater 1000Da polyethylene glycol and dimethylolpropionic acid in a vacuum oven at 110°C for 4 hours, and use molecular sieve to remove water for isophorone diisocyanate for 4 hours. An appropriate amount of acetone solvent was added to the reaction kettle, stirred at a high speed of 500 r / min, reacted at 50 °C for 2 h, added 13.5 g of dimethylolpropionic acid, continued to react for 2 h under the action of the catalyst dibutyltin dilaurate, and added 23.7 g of 1,6- Hexylene glycol continued to react for 1 h, cooled to room temperature, neutralized by adding 10.1 g of triethylamine, under high-speed stirring at 800 r / min, dropwise added deionized water to the device for emulsification, and distilled under reduced pressure until there was no residual acetone in the emulsion to obtain Waterborne phase change polyurethane.

[0078] Stir 100...

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Abstract

The invention discloses a phase change energy storage coating for an automobile cab and a preparation process thereof, the phase change energy storage coating comprises an outer coating, a middle layer and an inner coating, the outer coating is a water-based polyol dispersion modification layer, the middle layer is prepared from a water-based polyol dispersion filled with high infrared reflection particles, and the inner coating is prepared from a water-based polyol dispersion filled with high infrared reflection particles. And the inner coating is prepared by taking water-based phase-change polyurethane as a main material. Compared with the prior art, the situation that the automobile cab is cold in winter and hot in summer is relieved, the coating process is free of pollution, the temperature adjusting performance and the high light reflection performance are both considered, the coating is gray and does not contain organic solvents, the VOC content is reduced, and the green and environment-friendly requirements are met.

Description

technical field [0001] The invention relates to the technical field of automobiles, relates to a coating, and in particular relates to a phase-change energy storage coating for automobile cabs that takes into account both temperature adjustment performance and high light reflection performance, and a preparation process thereof. Background technique [0002] The cab of a car is very susceptible to environmental influences. It is extremely hot in summer. After the car is parked under the scorching sun, the temperature of the cab rises sharply, even reaching above 80°C; in winter, the temperature of the car cab is very low. In this regard, people usually open the windows or air conditioners to adjust the temperature inside the car. However, the above methods increase unnecessary time and waste of resources. Improving the thermal management of vehicles is essential to achieve higher efficiency. The emergence of variable heat storage technology and heat reflection technology is ...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D175/08C09D5/33C09K5/06
CPCC09D175/04C09D175/08C09D5/004C09K5/063C08K2003/321C08K3/32C08K9/08
Inventor 周志军管清宝沈连根汪旗徐晓飞游正伟徐一剡
Owner ZHEJIANG HEXIN NEW MATERIAL CO LTD
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