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Self-cleaning coating used for building curtain wall aluminum veneer and preparation method thereof

A technology of aluminum veneer and curtain wall, which is applied in the direction of construction, building components, anti-corrosion coatings, etc. It can solve the problems of low acid resistance and stain resistance of coatings, limited durability of coatings, and poor adhesion of aluminum veneers. Reduced construction cost, excellent durability and weather resistance, good protective effect

Active Publication Date: 2012-03-28
苏州金近幕墙有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional self-cleaning coatings for building curtain wall aluminum veneers have many problems, such as: (1) The coating usually contains strontium chromate, which causes heavy metal pollution; (2) The coating has poor adhesion to the aluminum veneer; (3) The durability of the coating is limited, generally within 5 years; (4) The acid resistance and stain resistance of the coating are not high, and frequent cleaning with a strong cleaning agent is required (often working at heights) , there is a certain risk); (5) The cost of conventionally used PVDF (polyvinylidene fluoride) fluorocarbon self-cleaning coatings is high, it is difficult to change the color, and it must be cured at high temperature, which is troublesome to operate and consumes energy

Method used

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  • Self-cleaning coating used for building curtain wall aluminum veneer and preparation method thereof
  • Self-cleaning coating used for building curtain wall aluminum veneer and preparation method thereof
  • Self-cleaning coating used for building curtain wall aluminum veneer and preparation method thereof

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Effect test

preparation example Construction

[0059] The preparation method of the B component in the second component is as follows:

[0060] Take the aliphatic isocyanate curing agent of the formulation amount and the remaining mixed solvent of about 3 / 10 of the formulation amount and mix evenly, and the obtained mixed solution is filtered with a filter bag with a pore size of 10 microns, and the filtrate is the self-made aluminum veneer for the building curtain wall. Component B in the second component of clean paint.

[0061] The third component of the self-cleaning coating for building curtain wall aluminum veneer of the present invention consists of the following components (by weight percentage):

[0062] FEVE fluorocarbon resin 60%~70%

[0063] Silicone resin 5%~10%

[0064] Acrylic leveling agent 0.05%~0.1%

[0065] Silicone leveling agent 0.1%~0.3%

[0066] Benzotriazole UV absorber 0.3%~0.8%

[0067] Hindered amine light stabilizer 0.3%~0.8%

[0068] Organotin catalyst 0.1%~0.3%

[00...

Embodiment 1

[0114] The formula of the first component of the self-cleaning paint for building curtain wall aluminum veneer according to this embodiment is (by weight, unit kg):

[0115] FB8131 polyester resin 520

[0116] CYMEL 303 amino resin 44

[0117] ETERKYD 490P-B-72 epoxy phosphate 12

[0118] SHIELDEX C 303 calcium ion exchange antirust pigment 80

[0119] Titanium dioxide R-960 130

[0120] Kaolin ASP170 70

[0121] Dispersant BYK ANTI-TERRA U 10

[0122] Coupling agent MOAP 1306 10

[0123] Coupling agent TYZOL AA-75 7

[0124] AEROSIL 200 fumed silica 2

[0125] S-150 aromatic hydrocarbon solvent 60

[0126] Ethylene glycol butyl ether 60

[0127] Apply the first component paint to the chrome-treated aluminum alloy panel, the steps are as follows:

[0128] (1) Take a chrome-treated aluminum alloy plate of 1mm×200mm×300mm, and wipe its surface clean with isopropanol (IPA);

[0129] (2), using a wire bar coating film preparer to coat the first component ...

Embodiment 2

[0168] The formula of the first component of the self-cleaning paint for building curtain wall aluminum veneer according to this embodiment is (by weight, unit kg):

[0169] K668A polyester resin 520

[0170] CYMEL 303 amino resin 44

[0171] Epoxy Phosphate 13

[0172] SHIELDEX C 303 calcium ion exchange antirust pigment 80

[0173] Titanium dioxide R-960 130

[0174] Kaolin ASP170 70

[0175] Dispersant BYK ANTI-TERRA U 10

[0176] Coupling agent MOAP 1306 10

[0177] Coupling agent TYZOL NPZ 8

[0178] Fumed silica anti-settling agent AEROSIL 200 2

[0179] S-150 Aromatic Hydrocarbon Solvent 56

[0180] Ethylene glycol butyl ether 60

[0181] In this example, epoxy phosphate is self-made epoxy phosphate, and its formula is (by weight, unit kg):

[0182] n-Butanol 5.6

[0183] E-51 epoxy resin 6.7

[0184] Phosphoric acid (mass fraction 85%) 2.7

[0185] Its preparation method is as follows:

[0186] Take a 200-liter plastic bucket, add the ...

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Abstract

The invention relates to self-cleaning coating used for a building curtain wall aluminum veneer and a preparation method thereof. The coating is divided into a first component, a second component and a third component, wherein the first component is coated on the surface of the aluminum veneer for forming a bottom coating; the second component is coated on the surface of the bottom coating to form a middle coating; the third component is coated on the surface of the middle coating to form a top coating; in the first component, polyester resin and amino resin serve as film forming substance, and silicon-titanium or silicon-zirconium coupling agent is used for greatly improving adhesive force on the aluminum veneer by the bottom coating; in the second component, fluoralkene alkyl vinyl ether or ester copolymer (FEVE) fluorocarbon resin serves as the film forming substance, and therefore the coating shows excellent durability, weather fastness and corrosion resistance; and in the third component, the FEVE fluorocarbon resin and organic silicon resin serve as the film forming substance, the coating surface tension is lowered by a fluorine and silicone interpenetrating network, the hydrophobicity and the contamination resistance of the coating surface are improved, and dirt on the coating surface is easy to clean. In addition, the preparation and construction processes of a coatingsystem disclosed by the invention are simple, and the self-cleaning coating is especially suitable for protecting an aluminum sheet curtain wall.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a self-cleaning coating for aluminum veneers of building curtain walls and a preparation method thereof. Background technique [0002] As time goes by, the surface coating of the building curtain wall will lose light, discolor, pulverize and fall off in the atmospheric environment, resulting in the exposure of the curtain wall base material. Corrosion due to electrochemical reaction, performance degradation, or even destruction, so the anti-corrosion technology of curtain wall base material plays an extremely important role in the safety performance and durability of curtain wall base material. In addition, acid rain and various dust and dirt in the atmospheric environment are easy to adhere to the surface of the curtain wall. Acid rain is corrosive to the surface coating of the curtain wall. If the substance penetrates into the coating film, the stain cannot be removed, and spots appear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D167/00C09D161/20C09D183/04C09D5/08E04B2/88
Inventor 章永瑞章基昌于少堂
Owner 苏州金近幕墙有限公司
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