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Surface conditioner containing zinc phosphate, phosphate chemical conversion treatment steelboard, coating steelboard and zinc phosphate dispersion liquid

A technology of surface modifier and phosphate chemistry, which is applied in the coating process of metal materials, etc., can solve the problems of poor stability and unsatisfactory handling

Inactive Publication Date: 2004-01-28
NIPPON PAINT SURF CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, research by the present inventors has revealed that this surface conditioning treatment solution also has disadvantages such as poor stability and insufficient handling properties for steel plates that are difficult to chemically convert, such as aluminum alloys or deep grooves of structurally complex members, or cast steel plates. ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] (Preparation of dispersion)

[0022] To use the zinc phosphate described above, it is best to prepare a dispersion liquid in advance to make it finely dispersed.

[0023] There is no special limitation on the preparation method for dispersing zinc phosphate in an aqueous medium to form an aqueous dispersion. A better method is to mix zinc phosphate in a dispersion medium such as water or an organic solvent, and carry out a wet process in the presence of a dispersant. Crush to prepare.

[0024] (dispersion medium)

[0025] As the dispersion medium that phosphate is dispersed, except that water accounts for more than 80% by weight of the aqueous medium, various organic solvents can also be used as a medium other than water, but the content of the organic solvent will be controlled in a lower range. It is preferably at most 10% by weight of the aqueous medium, more preferably at most 5% by weight. In the present invention, it is also possible to prepare a dispersion liq...

Embodiment 1

[0083] A zinc phosphate dispersion was prepared in the following manner.

[0084] Add 100 parts by weight of commercially available zinc phosphate in 142.3 parts by weight of water (the shape is the standard zinc phosphate of scale shape, and the average particle diameter of 3 μm is measured by a centrifugal light transmission type particle size distribution measuring machine, and the water-soluble component is 1% The following is measured by JIS-K-5101, the pH is 6.9 by JIS-K-5101, the oil absorption is 26ml / 100g by JIS-K-5101, the density is 3.0g / ml by JIS-K-5101, and sieved The residual component (45μm) is measured under 1% by JIS-K-5101, the ZnO component is 58% measured by the EDTA method, P 2 o 5 The composition is 33% determined by colorimetric analysis). Next, 5 parts by weight of a commercially available anionic surfactant polyoxyethylene alkyl phosphate (Fosfanol RS-610) (manufactured by Toho Chemical Co., Ltd.) was added as a dispersant. Thereafter, 1 part by wei...

Embodiment 2

[0087] A zinc phosphate dispersion was prepared in the following manner.

[0088] In 142.3 parts by weight of water, 100 parts by weight of commercially available zinc phosphate (commercially available zinc phosphate modified by silicate, with an average particle diameter of 4 to 5 μm is measured by a centrifugal light transmission type particle size distribution measuring machine, and the water-soluble component It is 1.9% as determined by JIS-K-5101, pH is 9.4 as determined by JIS-K-5101, ZnO component is 40% as determined by EDTA method, P 2 o 5 24% determined by colorimetric analysis, CaO 9% determined by EDTA method, SiO 2 10% determined by gravimetric method). Next, 5 parts by weight of a commercially available anionic surfactant polyoxyethylene alkyl phosphate (Fosfanol RS-610) (manufactured by Toho Chemical Co., Ltd.) was added as a dispersant. Then, 1 part by weight of AMP as a neutralizing agent and 0.3 part by weight of xanthan gum as a thickener were added and s...

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PUM

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Abstract

A zinc phosphate-containing surface conditioning agent to be used for surface conditioning as pretreatment for zinc phosphate conversion coating of a metallic material, which contains from 500 to 20,000 ppm of zinc phosphate and which has a pH of from 3 to 11, wherein said zinc phosphate has an average particle size of at most 3 mu m and D90 of at most 4 mum.

Description

technical field [0001] The present invention relates to a surface regulator, which is used for the pretreatment of zinc phosphate chemical conversion treatment on metal materials. Background technique [0002] Automobile bodies, home appliances, etc. are generally processed into metal moldings from metal materials such as steel sheets and galvanized steel sheets, and then painted and assembled to form products. The coating of such metal moldings goes through various processes such as degreasing, surface adjustment, chemical conversion treatment, and electroplating. [0003] The purpose of performing the surface conditioning treatment is to uniformly, rapidly and densely form a film of phosphate crystals on the entire surface of the metal in the phosphate chemical conversion treatment that is the next step. Usually, the metal material is immersed in a surface conditioning tank to form phosphate crystal nuclei on the metal surface. This surface adjustment process generally f...

Claims

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Application Information

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IPC IPC(8): C23C22/78
CPCC23C22/78
Inventor 宫本智志中泽淑子藤本大介
Owner NIPPON PAINT SURF CHEM
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