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Coating agent for aluminium foil in air condition heat exchanger and fabricating method thereof

A technology of heat exchanger and coating agent, applied in the direction of coating, device for coating liquid on the surface, etc., can solve the problems of complicated process, excessively thick coating, poor hydrophilic durability, etc., and achieves low investment and advanced formula. , the effect of no three wastes

Inactive Publication Date: 2005-10-26
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation process is complicated. Not only is the two-layer coating film on the 1mm thick aluminum foil too thick, but what is more serious is that the second hydrophilic layer uses mostly non-ionic and anionic surfactants. After the surfactant is wiped off, the surfactant inside the coating will migrate to the surface, but after a long time, the surfactant in the layer will lose its hydrophilic effect after migration, so the two-coating and two-baking method is not only complicated in process, but also The coating is too thick and has poor hydrophilic durability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Soak polyvinyl alcohol slices with a weight concentration of 12.5% ​​in distilled water at 25°C for 15 hours to soften the slices, then heat the distilled water containing polyvinyl alcohol to 95°C, and dissolve it completely under constant stirring. It is made into an aqueous solution with a weight content of 10%;

[0044] (2) 1.4kg of gelatin and 3kg of glycerin were dissolved in hot distilled water at 75°C respectively to form aqueous solutions with a weight concentration of 4.2%;

[0045](3) 0.45kg sodium dodecylbenzenesulfonate is made into a weight concentration of 20% aqueous solution;

[0046] (4) 0.21kg seventeen-carbon fatty acid base p-methoxybenzenesulfonate is made into an aqueous solution whose weight concentration is 40%;

[0047] (5) 2.3kg ammonium dichromate is mixed with the aqueous solution that weight concentration is 20%;

[0048] Zinc chloride 15 grams;

[0049] Distilled water is mixed with the above-mentioned components to prepare a soluti...

Embodiment 2

[0052] (1) Soak 12 kg of polyvinyl alcohol slices in distilled water at 25°C for 15 hours to soften the slices, then heat the distilled water containing polyvinyl alcohol at 95°C, and dissolve it completely under constant stirring, and the weight content is 15% aqueous solution;

[0053] (2) 2.7kg glycerol is dissolved with distilled water, and is made into the aqueous solution that weight concentration is 4.0%;

[0054] (3) 0.45kg sodium dodecylbenzenesulfonate is made into a weight concentration of 20% aqueous solution;

[0055] (4) 0.18kg N-amidopropyl-N, N-dimethyl-N-β-hydroxyl sulfonated propyl ammonium betaine is made into the aqueous solution that weight concentration is 40%;

[0056] (5) 2 kg of ammonium dichromate is mixed with a weight concentration of 20% aqueous solution;

[0057] (6) 15 grams of zinc chloride;

[0058] (7) Resist sodium pentachlorophenolate 2g;

[0059] (8) Defoamer tributyl phosphate 5g.

[0060] Distilled water is mixed with the above-menti...

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PUM

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Abstract

The present invention discloses a hydrophilic corrosion-resisting multifunctional environment-protecting type coating agent for aluminium foil of air-conditioning heat exchanger. The invented key lies in that after the ammonium dichromate is irradiated by light, it can produce photochemical reduction reaction to make Cr(+6)->Cr(+3) and finally produce chromium hydroammonate, it can be quickly complexed with hydroxyl group or carboxyl group or oxygen-containing group in the polyethylene, glycerine, ampholytic surfactant and anionic surface active agent to form cross-link bond so as to form water-insoluble high-strength macromolecular film.

Description

technical field [0001] The invention relates to a coating agent coated on the surface of aluminum foil, in particular to a hydrophilic, anti-corrosion, multifunctional and environment-friendly coating agent for aluminum foil of an air conditioner heat exchanger. Background technique [0002] At present, the air conditioners used in office, home and automobile are developing toward the air conditioners with new concepts such as miniaturization, light weight, performance optimization, energy saving and consumption reduction, green, healthy and environmental protection. To achieve the above goals, higher requirements are put forward for the important working parts of air-conditioning equipment - heat exchangers. Generally, the air conditioner heat exchanger is composed of aluminum foil cooling fins with a small pitch and complex fins of about 1 mm thick connected with internally threaded round copper tubes to enhance the heat exchange efficiency between the refrigerant liquid a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/04
Inventor 赵择卿陈小立崔淑玲
Owner DONGHUA UNIV
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