Acrylic acid composition coating and preparation method thereof

A composition, acrylic technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of poor corrosion resistance, poor acid and corrosion resistance, whitening coating surface, etc., to achieve good machinability and corrosion resistance, Excellent stamping oil resistance and solvent resistance, and the effect of low surfactant content

Active Publication Date: 2012-05-23
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment technology of air-conditioning aluminum fins has not yet achieved the expected effect. A large amount of condensed water generated during air-conditioning refrigeration will accumulate on the surface of aluminum fins due to surface tension to form water droplets, and the water droplets on adjacent aluminum fins will form "water droplets". "Bridge" blocks the air duct, causing the air pressure to increase during the operation of the air conditioner, reducing the heat exchange efficiency of the air conditioner and increasing the noise during operation
In order to solve the above problems, the current method is to carry out anti-corrosion and hydrophilic treatment on the surface of aluminum fins, but the coatings currently used for air-conditioning aluminum fins have the defects of poor acid and corrosion resistance and poor stability
Disclosed a kind of hydrophilic coating as Chinese patent application 02151903.X, this coating belongs to single coating coating, has good hydrophilic performance, but poor corrosion resistance
Chinese patent CN100363421C discloses a thermosetting acrylic emulsion coating, which has good stability, good coating performance and strong adhesion, but the surface of the coating will turn white and fall off after soaking in 10% HCL at 25°C for 10 minutes , Such air conditioner aluminum fins will appear "white powder" after a period of use, which will corrode and perforate the aluminum fins and greatly shorten the service life of the air conditioner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Acrylic composition paint composition content (the quality of following composition in every 100 gram paints):

[0041] Acrylic emulsion 28.9g

[0042] Ethanolamine and N, N-dimethylethanolamine mixture (PH value regulator) 0.32 grams

[0043] Ethanol (defoamer) 4.0 grams

[0044] Toluenesulfonic acid (catalyst) 0.4 grams

[0045] Dipropylene glycol methyl ether, ethylene glycol monobutyl ether and ethylene glycol monomethyl ether mixture (diluent) 8.5 grams

[0046] 747 (curing agent) 6.0 grams

[0047] Aquatech's AP-72 (Adhesion Promoter) 2.3g

[0048] Shenzhen Haichuan's H140 (wetting agent) 0.54g

[0049] Deionized water balance

[0050] The preparation steps of this coating are as follows:

[0051] (1), add an appropriate amount of acrylic acid emulsion to a certain amount of deionized water and stir, add a certain amount of ethanolamine and N,N-dimethylethanolamine mixture and adjust the pH value of the mixed solution to 7.5-10 to make mixture A;

[0052] ...

Embodiment 2

[0059] Acrylic composition paint component content (the quality of following example composition in every 100 grams of paint):

[0060] Acrylic emulsion 32.5g

[0061] Ethanolamine (PH value adjuster) 0.35 g

[0062] 4.5 grams of isopropanol and propanol mixture (defoamer)

[0063] Phosphoric acid, dodecylbenzenesulfonic acid and dibutyltin dilaurate mixture (catalyst) 0.42 grams

[0064] Dipropylene glycol methyl ether (thinner) 9.8 grams

[0065] 757 (curing agent) 6.9 grams

[0066] Degussa's EP-1300 (adhesion promoter) 2.8g

[0067] Degussa 501 (wetting agent) 0.6 g

[0068] Deionized water balance

[0069] The preparation steps of this coating are as follows:

[0070] (1), add 32.5 grams of acrylic acid emulsion to a certain amount of deionized water and stir, add a certain amount of ethanolamine and adjust the pH value of the mixed solution to 7.5-10 to make mixture A;

[0071] (2), mix 4.5 grams of isopropanol and propanol mixture with deionized water to form a ...

Embodiment 3

[0077] Acrylic composition paint component content (the quality of following example composition in every 100 grams of paint):

[0078] Acrylic emulsion 35.6g

[0079] Mixture of ethanolamine, diethanolamine and triethanolamine (pH regulator) 0.38 g

[0080] Propanol (defoamer) 4.8 grams

[0081] Phosphoric acid, dodecylbenzenesulfonic acid and dibutyltin dilaurate mixture (catalyst) 0.45 g

[0082] Dipropylene glycol methyl ether (thinner) 10.2 grams

[0083] 747 (curing agent) 7.2 grams

[0084] Degussa's EP-1300 (adhesion promoter) 2.7g

[0085] Degussa 501 (wetting agent) 0.65 g

[0086] Additive 0.03g

[0087] Deionized water balance

[0088] The preparation steps of this coating are as follows:

[0089] (1), add 35.6 grams of acrylic acid emulsion to a certain amount of deionized water and stir, add a certain amount of a mixture of ethanolamine, diethanolamine and triethanolamine and adjust the pH value of the mixed solution to 7.5-10 to make mixture A;

[0090]...

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PUM

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Abstract

The invention discloses an acrylic acid composition coating, which consists of acrylic emulsion, a catalyst, a curing agent, an adhesion promoter, a wetting agent, a pH value regulator, an antifoaming agent, a diluent, an aid and deionized water. The acrylic acid composition coating is prepared by the following steps of: adding other solvents into the mixture of the deionized water and the acrylic emulsion in turn; fully stirring and regulating the pH value; and the like. The acrylic acid composition coating is applied to coating an aluminum foil of an aluminum fin of a heat exchanger of an air-conditioner and coating automobiles and other metal surfaces, has the advantages of excellent water-solubility resistance, punching oil resistance and solvent resistance, excellent forming property, heat resistance, and anti-bend performance, no odor and low cost, and does not turn white or fall off under long-term strongly acidic environment.

Description

1. Technical field [0001] The invention relates to a coating and a preparation method thereof, in particular to a high anti-corrosion acrylic composition coating and a preparation method thereof. 2. Background technology [0002] With the increasing application rate of air conditioners, the shortage of energy promotes the development of air conditioners in the direction of lightweight, miniaturization and high energy efficiency ratio, which further reduces the thickness of aluminum fins and the spacing between aluminum fins of air conditioner heat exchangers. , the heat transfer area per unit weight of the heat exchanger increases. At present, the treatment technology of air-conditioning aluminum fins has not yet achieved the expected effect. A large amount of condensed water generated during air-conditioning refrigeration will accumulate on the surface of aluminum fins due to surface tension to form water droplets, and the water droplets on adjacent aluminum fins will form ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C09D5/08C09D133/00
Inventor 吕运征陈子路
Owner SNTO TECH GRP
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