Compositions and methods for forming coatings of selected color on a substrate and articles produced thereby

• US 20040161614A1
• Filed: 10/24/2003
• Published: 08/19/2004
• Est. Priority Date: 08/13/1998
• Status: Active Grant

• Current Assignee: Vitro Flat Glass LLC (Compagnie De Saint-Gobain)
• Original Assignee: Luke A. Kutilek, Patricia Ruzakowski Athey
• Inventors: Athey, Patricia Ruzakowski, Kutilek, Luke A.
• Granted Patent: US 7,507,479 B2
• Time in Patent Office: Days
• US Class Current: 428/432
• CPC Class Codes: C03C 17/002 for flat glass, e.g. float glass
• CPC Class Codes: C03C 17/23 Oxides C03C17/02 takes precedence
• CPC Class Codes: C03C 17/25 by deposition from the liquid phase
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 17/3694 one layer having a composition gradient through its thickness
• CPC Class Codes: C03C 2217/23 Mixtures

Abstract

A coated article comprising a substrate and a copper oxide and manganese oxide coating over the substrate, the coating having the molar ratio of copper to manganese in the range of about 6.8 to 1.2 and a blue color in transmission is disclosed.

Claims

1. A coated article comprising:

a. a substrate; and

b. a copper oxide and manganese oxide coating over the substrate, the coating having the molar ratio of copper to manganese in the range of about 0.8 to 1.2 and a blue color in transmission.

2. The coated article of claim 1 wherein the substrate is a glass substrate.

3. The coated article of claim 1 wherein a majority of the coating is cubic Cu_1.4Mn_1.6O₄ spinel type-phase.

4. A coating method comprising the steps of:

a. providing a coating composition comprising copper oxide and manganese oxide; and

b. applying the coating composition onto a surface of a substrate to form a coating having a molar ratio of copper to manganese in the range of about 0.8 to 1.2 on the surface.

5. The method as claimed in claim 4 wherein the substrate is heated during the practice of the applying step to pyrolyze the coating.

6. The method as claimed in claim 4 wherein a majority of the coating is cubic Cu_1.4Mn_1.6O₄ having a spinel-type phase to provide a coating having a blue color in transmission.

7. The method as claimed in claim 4 further comprising, the step of providing a layer comprising CuO between the coating and the substrate to prevent bleaching of the coating upon heating of the coated substrate.

8. The method as claimed in claim 4 wherein a chromium containing component is added to the coating composition.

9. The method as claimed in claim 4 wherein a cobalt containing component is added to the coating composition to improve acid resistance.

10. The method as claimed in claim 9 wherein the cobalt containing component is present in the coating composition in an amount greater than 50 wt % based on the weight of the total coating composition.