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Method for treating surface of aluminum article

A treatment method and surface treatment technology, applied in the direction of chemical instruments and methods, layered products, superimposed layer plating, etc., can solve the problem of difficult waste liquid treatment, and achieve the effect of firm joint and effective anchoring effect

Inactive Publication Date: 2020-03-17
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has a problem that it is difficult to treat waste liquid such as hydrazine solution used in the etching process.

Method used

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  • Method for treating surface of aluminum article
  • Method for treating surface of aluminum article
  • Method for treating surface of aluminum article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0118] Hereinafter, although an Example and a comparative example demonstrate this invention in detail, these do not limit this invention.

Synthetic example 1

[0119] (Synthesis Example 1) Synthesis of Allylated Phenolic Resin

[0120] In a flask equipped with a stirrer and a reflux tube, 720 g of potassium carbonate, 12 g of triphenylphosphine, 1100 g of water, 4 g of 5% Pd / C, and 104 g (1.0 equivalent) of novolac manufactured by Aika SDK Fenol Co. Resin "BRG556", 569 g (1.2 equivalents) of allyl acetate, and continued reaction at 90 degreeC for 8 hours.

[0121] Next, the reaction liquid was cooled to 40° C., 400 g of toluene and 400 g of water were added and stirred, and the reaction liquid was filtered, liquid-separated, and the toluene layer was taken out, and toluene and allyl acetate were distilled off under reduced pressure. Then, 400 g of toluene was further added to the residue, dissolved in toluene, the resulting toluene liquid was washed with water three times, and the toluene was distilled off under reduced pressure to obtain BRG556 allyl ether in a yield of 95%.

[0122] This BRG556 allyl ether was put into a beaker, a...

Embodiment 1

[0124]

[0125] 24 parts by weight of (A) Epicoat 1001 manufactured by Mitsubishi Chemical Corporation as an epoxy resin and 16 parts by weight of (B) a phenolic resin "BRL-240" from Aika SDK Fenol Co., Ltd. as a phenolic resin were dissolved in 50 parts by weight of In a solvent consisting of MEK and 60 parts by weight of water, 0.4 parts by weight of 2,4,6-tris(dimethylaminomethyl)phenol (DMP-30) was added to the resulting solution to prepare a coating varnish -1.

[0126]

[0127] (one time processing)

[0128] Prepare an aluminum plate of 50 mm x 90 mm (thickness: 2.0 mm) (brazed with surface: No. 3000, back: No. 4000), etch it with sodium hydroxide (immerse in 5% sodium hydroxide aqueous solution for 1.5 minutes Then neutralize with 5% nitric acid, wash with water and dry).

[0129] (secondary processing)

[0130] Next, the aluminum plate subjected to the primary treatment was immersed at 30° C. in 100 g of toluene in which 5.44 g of pentaerythritol tetrakis (3-mer...

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Abstract

Provided is a method for treating a surface of an aluminum article, by which a surface of an aluminum article can be imparted with an effective anchoring effect without using a chemical liquid whose waste is not easy to treat, and which can enable strong chemical bonding to a coated resin layer that is applied to the surface or to an organic material layer of a layered FRP or the like. The presentinvention is a method for treating a surface of an aluminum article, the method being characterized by subjecting a surface of an aluminum article to one or more of an etching treatment, a boehmite treatment and a zirconium treatment and then to one or more of a silane coupling agent treatment, an isocyanate compound treatment and a thiol compound treatment.

Description

technical field [0001] The invention relates to a method for treating the surface of an aluminum product capable of making the surface of an aluminum product exhibit an effective anchoring effect and capable of forming a firm chemical bond with an organic material layer applied to the surface. Background technique [0002] Aluminum-based materials are lightweight, have excellent workability and thermal conductivity, and are widely used in various components such as heat exchangers. However, aluminum-based materials cannot be directly used for parts requiring corrosion resistance, and anodic oxidation treatment, chemical conversion treatment, and electroplating treatment are usually performed on the aluminum surface, and resin coating is preferably performed on the surface when further corrosion resistance is required. In the case of resin coating, aluminum surface treatment technology is very important in order to ensure a strong bond between resin and aluminum. The aforeme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/04B32B15/04B32B37/14C23C22/07C23C22/68C23F1/36
CPCB32B37/14C23F1/36C23C28/00C23C28/322C23C28/34C23F1/20C23C22/83C23C2222/20C23C22/02C23C22/07F28F13/18F28F19/02F28F21/084B32B5/02B32B2307/54B32B2262/106B32B2260/021B32B2255/26B32B2307/714B32B2605/08B32B2307/302B32B2262/0269B32B15/20B32B15/14B32B2260/046B32B2255/06B32B2262/101C23C22/66C23C28/345
Inventor 大谷和男平野智哉沼尾臣二
Owner SHOWA DENKO KK
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