Method of making coated articles and coated articles made thereby

• US 6,869,644 B2
• Filed: 10/22/2001
• Issued: 03/22/2005
• Est. Priority Date: 10/24/2000
• Status: Expired due to Term

• Current Assignee: Vitro Flat Glass LLC (Compagnie De Saint-Gobain)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Lehan, John P., Thiel, James P., Finley, James J., Buhay, Harry
• Primary Examiner(s): Beck, Shrive P.
• Assistant Examiner(s): FLETCHER III, WILLIAM P
• Application Number:
  US10/007,382
• Publication Number:
  US 20040106017A1
• Time in Patent Office: 1,247 Days
• Field of Search: 427/402, 427/419.1, 427/419.2, 427/376.1, 427/376.2, 427/162, 427/165
• US Class Current: 427/419.2
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: C03C 17/3417 all coatings being oxide coatings
• CPC Class Codes: C03C 17/36 at least one coating being a metal
• CPC Class Codes: C03C 17/3618 Coatings of type glass/inorganic compound/other inorganic layers, at least one layer being metallic
• CPC Class Codes: C03C 17/3639 Multilayers containing at least two functional metal layers
• CPC Class Codes: C03C 17/3644 the metal being silver
• CPC Class Codes: C03C 17/3652 the coating stack containing at least one sacrificial layer to protect the metal from oxidation
• CPC Class Codes: C03C 17/366 Low-emissivity or solar control coatings
• CPC Class Codes: C03C 17/3681 the multilayer coating being used in glazing, e.g. windows or windscreens
• CPC Class Codes: C03C 17/38 at least one coating being a coating of an organic material
• CPC Class Codes: C03C 17/42 at least one coating of an organic material and at least one non-metal coating
• CPC Class Codes: C23C 14/08 Oxides C23C14/10 takes precedence
• CPC Class Codes: C23C 14/5806 Thermal treatment
• CPC Class Codes: G02B 5/0858 the reflecting layers comprising a single metallic layer with one or more dielectric layers
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree

Abstract

A method of making a coated substrate includes providing a substrate having a functional coating with a first emissivity value; depositing a coating material having a second emissivity value over at least a portion of the functional coating prior to heating to provide a coating stack having an emissivity value greater than the emissivity value of the functional coating; and heating the coated substrate.

Claims

1. A method of making a coated substrate, comprising:

providing a substrate having a functional coating including one or more infrared reflective films comprising a reflective metal with a first emissivity value; and

depositing a coating material comprised of 35 wt. % to 100 wt. % alumina and 0 wt. % to 65 wt. % silica having a second emissivity value over at least a portion of the functional coating to provide a coating stack having an emissivity value greater than the emissivity value of the functional coating.

2. The method of claim 1, including heating the coated substrate.

3. The method of claim 1, wherein the coating material comprises 75 wt. % to 85 wt. % alumina and 15 wt. % to 25 wt. % silica.

4. The method of claim 1, wherein the coating material comprises 86 wt. % to 90 wt. % alumina and 10 wt. % to 14 wt. % silica.

5. The method of claim 1, including depositing the coating material to a thickness in the range of 100 Å

to 1.5 microns.

6. The method of claim 1, wherein the coating material has an index of refraction substantially the same as the index of refraction of the substrate.

7. The method of claim 1, wherein the substrate is glass and the method includes depositing the coating material to have a thickness in the range of 100 Å

to 1.5 microns and a refractive index of 1.5±

0.2.

8. The method of claim 1, wherein the first emissivity value is different than the second emissivity value.

9. A method of making a coated substrate, comprising:

providing a substrate having a functional coating with a first emissivity value; and

depositing a coating material comprised of 75 wt. % to 85 wt. % alumina and 15 wt. % to 25 wt. % silica having a second emissivity value over at least a portion of the functional coating to provide a coating stack having an emissivity value greater than the emissivity value of the functional coating.

10. A method of making a coated substrate, comprising:

providing a substrate having a functional coating with a first emissivity value; and

depositing a coating material comprised of 86 wt. % to 90 wt. % alumina and 10 wt. % to 14 wt. % silica having a second emissivity value over at least a portion of the functional coating to provide a coating stack having an emissivity value greater than the emissivity value of the functional coating.