SURFACE-TREATED ALUMINUM PLATE, ORGANIC-RESIN-COATED SURFACE -TREATED ALUMINUM PLATE, CAN BODY AND CAN LID FORMED BY USING THE SAME

• US 20150056390A1
• Filed: 03/29/2013
• Published: 02/26/2015
• Est. Priority Date: 03/30/2012
• Status: Abandoned Application

• Current Assignee: Toyo Seikan Group Holdings, Ltd.
• Original Assignee: Toyo Seikan Group Holdings, Ltd.
• Inventors: Miyai, Tomohiro, Funagi, Yuji, Kashiwakura, Takuya
• Application Number:
  US14/387,714
• Publication Number:
  US 20150056390A1
• Time in Patent Office: Days
• US Class Current: 428/35.8
• CPC Class Codes: B65D 25/14 Linings or internal coatings of containers made by folding or erecting blanks made of paper B65D5/56 ; linings for domestic water storage heaters F24H1/183
• CPC Class Codes: B65D 25/34 Coverings or external coatings of containers made by folding or erecting blanks made of paper B65D5/62; for bottles or jars B65D23/08; wrappers B65D65/00
• CPC Class Codes: C23C 22/34 containing fluorides or complex fluorides
• CPC Class Codes: Y10T 428/1355 Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]

Abstract

A surface-treated aluminum plate obtained by forming, on at least one surface of an aluminum plate, a conversion-coated layer that contains a polyester resin and a zirconium compound or a titanium compound. The surface-treated aluminum plate excellently adheres to an organic resin coating and can be used as a material for producing cans featuring excellent corrosion resistance and shock resistance.

Claims

1. A surface-treated aluminum plate obtained by forming, on at least one surface of an aluminum plate, a conversion-coated layer that contains a polyester resin and a zirconium compound or a titanium compound.

2. The surface-treated aluminum plate according to claim 1, wherein the ratio C/M of the amount C of carbon and the amount M of zirconium or titanium in said conversion-coated layer lies in a range of 1 to 80.

3. The surface-treated aluminum plate according to claim 1, wherein said conversion-coated layer contains a polycarboxylic acid.

4. The surface-treated aluminum plate according to claim 3, wherein said conversion-coated layer contains a metal chelate complex that comprises aluminum ions, zirconium ions or titanium ions and the polycarboxylic acid.

5. The surface-treated aluminum plate according to claim 1, wherein said conversion-coated layer contains a particulate component.

6. The surface-treated aluminum plate according to claim 3, wherein the ratio C/M of the amount C of carbon and the amount M of zirconium or titanium lies in a range of 1 to 40 in said conversion-coated layer.

7. The surface-treated aluminum plate according to claim 5, wherein said particulate component comprises water-dispersible crosslinked particles of a copolymer of a methyl poly(meth)acrylate or a copolymer of a methyl poly(meth)acrylate and a poly(meth)acrylic acid, or comprises particles of an inorganic silica compound.

8. The surface-treated aluminum plate according to claim 5, wherein said particulate component has a particle size in a range of 1 to 200 nm.

9. An organic resin-coated surface-treated aluminum plate obtained by forming an organic resin coating on the conversion-coated layer of the surface-treated aluminum plate of claim 1.

10. A can body formed from the organic resin-coated surface-treated aluminum plate of claim 9.

11. A can lid formed from the organic resin-coated surface-treated aluminum plate of claim 9.

12. A surface-treating solution for treating the surface of an aluminum plate by a conversion treatment, the surface-treating solution containing a water-dispersible polyester resin and fluorine ions, zirconium ions or titanium ions.

13. The surface-treating solution according to claim 12, wherein said polyester resin is contained in an amount of 100 to 10,000 ppm, and said zirconium ions or said titanium ions are contained in an amount of 5 to 5,000 ppm.

14. The surface-treating solution according to claim 12, wherein a polycarboxylic acid and/or a water-dispersible particulate component is contained.

15. The surface-treating solution according to claim 14, wherein said polyester resin is contained in an amount of 500 to 10,000 ppm, said water-dispersible particulate component is contained in an amount of 100 to 3,000 ppm, said polycarboxylic acid is contained in an amount of 5 to 2,000 ppm, and said zirconium ions or said titanium ions are contained in an amount of 5 to 5,000 ppm.