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Resin coating metal plate

A metal plate and resin technology, used in epoxy resin coatings, synthetic resin layered products, coatings, etc., can solve the problems of corrosion, disappearance of GA material anchoring effect, rough surface of GA material and unevenness, etc., to meet the requirements of corrosion resistance. sexual effect

Active Publication Date: 2013-07-10
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] On the other hand, when the above-mentioned resin film is also applied to GA materials, the adhesion or corrosion resistance of the coating film after post-coating may not be sufficient.
The reason for the insufficient adhesion of the coating film is that the surface of the GA material is rough and has unevenness. Originally, the anchoring effect can make the adhesion of the coating film excellent. Can cover the outermost layer of GA material, resulting in the disappearance of the anchoring effect of GA material
In addition, as the cause of insufficient corrosion resistance, it is considered that the above-mentioned resin film can only cover the outermost layer of the GA material, and the bottom of the concave part does not form a film, so that the zinc plating layer is exposed. Corrosion occurs under the coating film when a crosscut is inserted into the surface for corrosion resistance test
Furthermore, there are also the following problems: bubbles (paint swelling) around the cross-cut portion in the above-mentioned corrosion resistance test due to voids generated at the bottom of the concave portion; use of water-absorbing lithium silicate as the resin coating component

Method used

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Examples

Experimental program
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Embodiment

[0086] Hereinafter, the present invention will be described in detail based on examples. However, the following examples do not limit the present invention, and all changes made within the scope not departing from the gist of the foregoing and the following are included in the technical scope of the present invention.

[0087] First, the evaluation method used in the experimental example will be described below.

[0088] (Resistance to Roll Formability)

[0089] Cut a sample of 40 mm × 300 mm from a resin-coated metal plate, and fix it vertically on a tensile testing machine so that the back of the sample is in contact with a flat mold (material: SKD11). Next, the opposite surface (front side) of the sample in contact with the flat mold is brought into contact with a jig (semi-cylindrical mold, material: SKD11) having a convex portion with a tip radius R=9.1mm, and the jig is applied in the horizontal direction. With a load of 4900N (500kgf), the clamp is stretched downward ...

experiment example 1-1～1-10

[0125]

[0126]To the above emulsion, colloidal silica (A) (manufactured by Nissan Chemical Industries, Ltd., Snowtex (registered trademark) XS (solid content concentration: 20%)) with a surface area average particle diameter of 4 to 6 nm (nominal value) and Colloidal silica (B) (manufactured by Nissan Chemical Industry Co., Ltd., Snowtex (registered trademark) 40 (solid content concentration: 40%)) with a surface area average particle diameter of 10 to 20 nm (nominal value) was mixed well, and then added Glycidoxy-containing silane coupling agent (manufactured by Shin-Etsu Chemical Industry Co., Ltd., KBM403 (solid content concentration 100%)), followed by adding sodium metavanadate as metavanadate (manufactured by Shin-Etsu Chemical Industry Co., Ltd., metavanadic acid Sodium (solid content concentration about 66%)). An acrylic-modified epoxy resin (manufactured by Arakawa Chemical Industry Co., Ltd., MODEPICS (registered trademark) 302 (solid content concentration: 33.5%)...

experiment example 1-11

[0136]

[0137] SiO 2 / Li 2 Lithium silicate ("lithium silicate 45" manufactured by Nissan Chemical Industries, Ltd.) having a molar ratio of 4.5 and colloidal silica (manufactured by Nissan Chemical Industries, Ltd., Snowtex (Nissan Chemical Industries, Ltd.) Registered trademark) XS) were mixed in a mass ratio of 90:10 to prepare an inorganic component.

[0138] Add the obtained inorganic components to the above-mentioned emulsion, and after the two are thoroughly mixed, add a glycidoxy-containing silane coupling agent (manufactured by Shin-Etsu Chemical Co., Ltd., KBM403, γ-glycidoxypropyl tri Ethoxysilane), followed by adding sodium metavanadate (manufactured by Shinshin Chemical Industry Co., Ltd., sodium metavanadate). To this mixture, an oxazoline group-containing copolymer (manufactured by Nippon Shokubai Co., Ltd., Epocros (registered trademark) K-2030E, 40% by mass of solid content) was further added to prepare a surface treatment composition.

[0139] In additi...

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Abstract

The invention provides a resin coating metal plate which is provided with a resin capsule ontained from a surface-modified composition; the surface-modified composition comprises an inorganic component which is composed of various colloidal silica with different surface area average particle sizes, and a resin component which is composed of olefin-alpha, beta-unsaturated carboxylic acid copolymer, alpha, beta-unsaturated carboxylic acid polymer, and acrylic acid modified epoxy resin, and also comprises a silane coupling agent with epoxy propoxy groups and a metavanadate. Based on the composition, a resin coating metal plate is obtained with both corrosion resistance and rolling-resistant formability as well as post-coating coating sealing property.

Description

technical field [0001] The present invention relates to a resin-coated metal sheet excellent in roll formability and coating film adhesion after post-coating. Background technique [0002] Hot-dip galvanized steel sheets used for building materials include hot-dip galvanized steel sheets (GI materials) in which pure zinc is coated on steel sheets, alloyed galvanized steel sheets (GA materials), and the like. For the GI material, the GI material is continuously passed between multiple sets of rollers arranged in a row (the forming speed is about 20-70m / min), and the forming process is performed sequentially, and the formed product of the ideal cross-sectional shape is processed from the flat plate (roll forming). , naked (no post-painting) for decks and light steel keels, etc. In addition, GA materials are used for doors or shutters after post-coating the surface with calcium lead acid antirust paint, lead-free paint, or electrodeposition paint. [0003] Conventionally, chr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/08B32B27/18C09D123/08C09D135/00C09D163/00C09D7/12
Inventor 中元忠繁筱原可亮
Owner KOBE STEEL LTD