# US 2008/0187743 A1 · Resin-Coated Metal Sheet

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- Number: US 2008/0187743 A1
- Document ID: US20080187743A1
- Status: Published application
- Kind: A1
- Application number: 11/568,931
- Filed: 2005-07-07
- Published: 2008-08-07
- Earliest claimed: 2004-07-09
- Assignees: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- Inventors: Hiroo Shige; Masatoshi Iwai; Kazuhisa Fujisawa; Hironobu Nakanishi
- Web page: https://patentgrep.com/patent/US20080187743A1

## CPC

- C09D 5/24: Electrically-conducting paints {(conductive materials H01B1/00)}
- C09D 5/084: {Inorganic compounds}
- Y10T 428/254: Polymeric or resinous material
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A resin-coated metal sheet having a metal sheet and a resin layer containing electroconductive particles provided on the surface of the metal sheet is characterized in that t (μm), r (μm), d84 (μm) and d16 (μm) satisfy the following expressions 2.0≦t≦16, 0.25t≦r≦2t, and SD=(d84-d16)/2≦0.8r, wherein t represents the film thickness (μm) of the resin layer, r represents a volume average particle diameter (μm) of the electroconductive v articles, and d84 and d16 represent the particle diameters (μm) at cumulative percentages of 84% and 16%, respectively in the cumulative particle diameter distribution of the electroconductive particles.

## Claims

### Claim 1

A resin-coated metal sheet having a resin layer containing electroconductive particles provided on the surface of the metal sheet,
wherein t (μm), r (μm), d84 (μm), and d16 (μm) satisfy the following expressions:
2.0≦t≦16
0.25t≦r≦2t
SD=(d84-d16)/2≦0.8r, [Expressions 1]
wherein t represents the film thickness (μm) of the resin layer, r represents a volume average particle diameter (μm) of the electroconductive particles, and d84 and d16 represent the particle diameters (μm) at cumulative percentages of 84% and 16%, respectively, in the cumulative particle diameter distribution of the electroconductive particles.

### Claim 2 (depends on 1)

The resin-coated metal sheet according to claim 1 wherein the electroconductive particle is iron phosphide.

### Claim 3 (depends on 1)

The resin-coated metal sheet according to claim 1, wherein content of the electroconductive particles in the resin layer ranges 40 to 60 mass %.

### Claim 4 (depends on 1)

The resin-coated metal sheet according to claim 1, wherein the resin layer is an epoxy resin.

### Claim 5 (depends on 1)

The resin-coated metal sheet according to claim 1, wherein the resin layer is a flexible epoxy resin which can be bent 300 times or more before it is cracked in an MIT flexural test.

### Claim 6 (depends on 1)

The resin-coated metal sheet according to claim 1, wherein the resin layer is cured (hardened) by a curing agent.

### Claim 7 (depends on 1)

The resin-coated metal sheet according to claim 1, wherein the film thickness t (μm) of the resin layer and the volume average particle diameter r (μm) of the electroconductive particle satisfy the following expression:
0.3t≦r≦1.8t [Expression 2]