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Aquosity metal finishing composition

A metal surface treatment and composition technology, which is applied in the field of water-based metal surface treatment compositions, achieves the effects of excellent storage stability, excellent corrosion resistance, and favorable conductivity

Active Publication Date: 2016-02-10
KANSAI PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, none of these conventional water-based metal surface treatment agents satisfies the conditions of excellent paintability and storage stability, corrosion resistance before and after degreasing treatment, electrical conductivity, anti-fingerprint properties, and overcoating properties. Coating with excellent layer adhesion and chromate-free, further improvement is required

Method used

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Examples

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Embodiment

[0100] Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples of the present invention. The present invention is not limited to these Examples and the like. In addition, hereinafter, "parts" and "%" mean "parts by mass" and "% by mass" unless otherwise specified.

[0101] Production of organopolysiloxane (A)

manufacture example 1

[0103] Into a detachable flask equipped with a reflux condenser, a thermometer, and a stirrer, mix 850 parts of deionized water and 23 parts of acetic acid, and then add γ-glycidoxypropyltrimethoxyl while cooling in an ice bath. A mixture of 61 parts of silane and 35 parts of methyltrimethoxysilane was stirred and dissolved for 30 minutes. Next, 29 parts of N-2-(aminoethyl)-3-aminopropyltrimethoxysilane was slowly injected and dissolved therein, and it was reacted at 80 degreeC for 5 hours, and the aqueous medium of organopolysiloxane was obtained. according to 1 As a result of H-NMR measurement, it was confirmed that no epoxy group remained in the organopolysiloxane. Next, the aqueous medium of the organopolysiloxane was distilled under reduced pressure at 60 to 70° C. and concentrated until the solid content concentration became 15% by mass. In this way, alcohol produced by hydrolysis was distilled off together with water, and then filtered through a 200-mesh filter to obt...

manufacture example 2～9

[0107] In manufacture example 1, except having changed the formulation composition as shown in Table 1, it carried out similarly to manufacture example 1, and prepared organopolysiloxane A2-A9 aqueous solution. The alcohol concentration of any of the aqueous solutions of organopolysiloxanes A2 to A9 measured by a gas chromatograph was less than 1.5%, and no flash point was observed.

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Abstract

The present invention provides an aquosity metal finishing composition excellent in paintwork and storage stability, and can form a chromate free surface treatment film excellent in corrosion resistance before and behind degreasing treatment, conductivity, anti-fingerprint property and glazing adhesion. The aquosity metal finishing composition contains organopolysiloxane (A) as a binder main component, and compound (B) having a propargyl group, a hydroxyl group, and mono-oxyethylene or polyoxyalkylene of the molecular weights 100-800, the mono-oxyethylene or polyoxyalkylene in the compound (B) being at least one type chosen from an oxyethylene group, a polyoxyethylene group, an oxypropylene group, a polyoxypropylene group, and a divalent copolymer chain of ethylene oxide and propylene oxide.

Description

technical field [0001] The present invention relates to a water-based metal surface treatment composition, a surface treatment method of a metal material using the surface treatment composition, and a surface-treated metal material obtained by forming a coating based on the surface treatment composition. The surface treatment composition is excellent in paintability and storage stability, and can form a coating with excellent corrosion resistance, electrical conductivity, fingerprint resistance, and top coating adhesion (top coating adhesion) before and after degreasing treatment. A chromate-free surface treatment coating that does not contain pollution-restricted substances such as hexavalent chromium. Background technique [0002] In general, as a technique for providing excellent adhesion to the surface of a metal material and imparting corrosion resistance to the surface of a metal material, it is known to use a treatment solution containing chromic acid, dichromic acid,...

Claims

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Application Information

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IPC IPC(8): C23C22/36C23C22/42C23C22/44
Inventor 樋口贵祐芦田康成阿久井润
Owner KANSAI PAINT CO LTD
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