Antibacterial surface treated copper material and a method for preparing the same

Patent metadata

Field	Value
Publication number	US-11672253-B2
Application number	US-202117411295-A
Country	US
Kind code	B2
Filing date	Aug 25, 2021
Priority date	Nov 30, 2020
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

A manufacturing method of an antibacterial surface treated copper material includes: etching a metal base material including copper; primary heat-treating the metal base material; coating the metal base material with a composition for a coating; and secondary heat-treating the metal base material. The composition for the coating includes an acryl resin at 40 wt % to 50 wt % and CuO at 1 wt % to 5 wt % for an entire weight of the composition for the coating.

First claim

What is claimed is:

1. A manufacturing method of an antibacterial surface treated copper material, the manufacturing method comprising:
etching a metal base material including copper;
primary heat-treating the metal base material;
coating the metal base material with a composition for a coating; and
secondary heat-treating the metal base material,
wherein the composition for the coating includes an acryl resin at 40 wt % to 50 wt % and CuO at 1 wt % to 5 wt % for an entire weight of the composition for the coating.

2. The manufacturing method of claim 1 , wherein
the metal base material including copper is a brass including copper (Cu) at 65 wt % to 75 wt % and zinc (Zn) at 25 wt % to 35 wt % for the entire weight of the metal base material.

3. The manufacturing method of claim 1 , wherein
the etching is performed for 1 minute to 10 minutes by using HCl at a 0.5 N to 3 N concentration.

4. The manufacturing method of claim 1 , wherein
the primary heat treatment is performed at 150° C. to 200° C. for 1 hour to 2 hours.

5. The manufacturing method of claim 1 , further comprising
degreasing the metal base material after the primary heat treatment of the metal base material and before the coating of the metal base material with the composition for the coating.

6. The manufacturing method of claim 5 , wherein
the degreasing is performed for 10 seconds to 10 minutes by using a Na 3 PO 4 aqueous solution of 25 g/l to 35 g/l.

7. The manufacturing method of claim 1 , wherein
the composition for the coating further includes a cyclohexanone solvent at 10 wt % to 15 wt %, a melamine hardening agent at 10 wt % to 20 wt %, an aromatic solvent at 5 wt % to 10 wt %, SiO 2 at 10 wt % to 15 wt %, and a phenol resin at 1 wt % to 5 wt % for the entire weight of the composition for the coating.

8. The manufacturing method of claim 1 , wherein
the coating is performed by coating the composition for the coating for 1 minute to 10 minutes and drying at 100° C. to 200° C. for 30 minutes to 60 minutes.

9. The manufacturing method of claim 1 , wherein
the secondary heat treatment is performed at 100° C. to 150° C. for 1 hour to 2 hours.

10. An antibacterial surface treated copper material comprising:
a metal base material including copper; and
a coating layer positioned on the metal base material,
wherein the coating layer includes an acryl resin at 50 wt % to 65 wt % and CuO at 1.5 wt % to 5 wt % for the entire weight of the coating layer.

11. The antibacterial surface treated copper material of claim 10 , wherein
the coating layer further includes a melamine hardening agent at 15 wt % to 20 wt %, SiO 2 at 15 wt % to 20 wt %, and a phenol resin at 1.5 wt % to 5 wt % for the entire weight of the coating layer.

12. The antibacterial surface treated copper material of claim 10 , wherein
the thickness of the coating layer is 15 μm or less.

13. The antibacterial surface treated copper material of claim 10 , wherein
a metal oxide layer including CuO is not disposed between the metal base material and the coating layer.

14. The antibacterial surface treated copper material of claim 10 , wherein
a metal oxide layer including CuO between the metal base material and the coating layer is removed by etching.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Yoo Chang Yeol
• Lim Jaesun

Classifications

• C22C9/04 Primary

  with zinc as the next major constituent · CPC title

• A01N59/20 Primary

  Copper · CPC title

• C22F1/08

  of copper or alloys based thereon · CPC title

• C23G1/00

  Cleaning or pickling metallic material with solutions or molten salts (with organic solvents C23G5/02) · CPC title

• A01P1/00

  Disinfectants; Antimicrobial compounds or mixtures thereof · CPC title