Selective light-blocking optical products having a neutral reflection

• US 10,613,261 B2
• Filed: 04/09/2018
• Issued: 04/07/2020
• Est. Priority Date: 04/09/2018
• Status: Active Grant

• Current Assignee: Southwall Technologies, Inc. (Eastman Chemical Company)
• Original Assignee: Southwall Technologies, Inc. (Eastman Chemical Company)
• Inventors: Krogman, Kevin C., Farrow, James Yancy, Hodder, Daniel Lewis, Honeycutt, David Lee, Boman, Lee Campbell, Port, Anthony Brian, Lang, Bruce Robert, Hawkins, Michael
• Primary Examiner(s): Jones, James C.
• Application Number:
  US15/947,891
• Publication Number:
  US 20190310402A1
• Time in Patent Office: 729 Days
• Field of Search: 359723
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10339 Specific parts of the laminated safety glass or glazing being colored or tinted tinted glass sheet B32B17/1011; tinted interlayer B32B17/10651
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: C03C 27/06 Joining glass to glass by processes other than fusing fusing C03B23/20; units for use as elements for closing wall or like openings and comprising two or more parallel glass panes in spaced relationship, the panes being permanently secured together E06B3/66
• CPC Class Codes: C08K 2201/014 Additives containing two or more different additives of the same subgroup in C08K
• CPC Class Codes: C08K 5/0041 Optical brightening agents, organic pigments
• CPC Class Codes: C09D 5/32 Radiation-absorbing paints protection against X-, gamma- or corpuscular radiation G21F
• CPC Class Codes: C09D 7/41 Organic pigments; Organic dyes
• CPC Class Codes: G02B 1/10 Optical coatings produced by application to, or surface treatment of, optical elements G02B1/08 takes precedence
• CPC Class Codes: G02B 5/206 comprising particles embedded in a solid matrix
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments
• CPC Class Codes: G02B 5/26 Reflecting filters G02B5/28 takes precedence
• CPC Class Codes: G02B 5/28 Interference filters

Abstract

Optical products that comprise a composite coating having multiple bilayers of a first layer and a second layer, each provided with a binding group component which together form a complementary binding group pair, the multiple bilayers comprising: at least one bilayer a) comprised of a first pigment or pigment blend that exhibits a color reflection value that is less than about 2.5; at least one bilayer b) comprised of a pigment or pigment blend that selectively blocks visible light in a wavelength range of interest; and at least one bilayer c) comprised of a second pigment or pigment blend that exhibits a color reflection value that is less than about 2.5, wherein the optical product selectively blocks visible light in the wavelength range of interest, while exhibiting a color reflection value that is less than about 2.5.

Claims

1. An optical product comprising a composite coating, deposited on a substrate, that includes multiple bilayers having a first layer and a second layer, each provided with a binding group component which together form a complementary binding group pair, the multiple bilayers comprising, in sequence:

at least one bilayer a) comprised of a first pigment or pigment blend that, when formed into a bilayer, exhibits a color reflection value that is less than about 2.5;

at least one bilayer b) comprised of a pigment or pigment blend that, when formed into a bilayer, selectively blocks visible light in a wavelength range of interest; and

at least one bilayer c) comprised of a second pigment or pigment blend that, when formed into a bilayer, exhibits a color reflection value that is less than about 2.5, and that may be the same as or different than the first pigment or pigment blend,

wherein the optical product selectively blocks visible light in the wavelength range of interest, while exhibiting a color reflection value that is less than about 2.5.

2. The optical product of claim 1, wherein the wavelength range of interest is a 75 nm wavelength range.

3. The optical product of claim 1, wherein the wavelength range of interest is a 50 nm wavelength range.

4. The optical product of claim 1, wherein the wavelength range of interest is from 400 nm to 450 nm.

5. The optical product of claim 1, wherein the wavelength range of interest is from 600 nm to 650 nm.

6. The optical product of claim 1, wherein the wavelength range of interest is from 500 nm to 600 nm.

7. The optical product of claim 1, wherein the wavelength range of interest is from 525 nm to 575 nm.

8. The optical product of claim 1, further comprising:

at least one bilayer d), deposited on the at least one bilayer c), comprised of a pigment or pigment blend that, when formed into a bilayer, selectively blocks visible light in the wavelength range of interest, and that may be the same as or different than the pigment or pigment blend of bilayer b); and

at least one bilayer e) comprised of a neutral pigment or pigment blend that, when formed into a bilayer, exhibits a color reflection value that is less than about 2.5, and that may be the same as or different than the pigment or pigment blend of bilayer a) or bilayer c).

9. The optical product of claim 1, wherein the color reflection value is less than about 2.0.

10. The optical product of claim 1, wherein the color reflection value is less than about 1.5.

11. The optical product of claim 1, wherein the optical product blocks at least 70% of visible light within the wavelength range of interest.

12. The optical product of claim 1, wherein the optical product blocks at least 80% of visible light within the wavelength range of interest.

13. The optical product of claim 1, wherein the substrate comprises a polyethylene terephthalate film.

14. The optical product of claim 1, wherein the composite coating has a total thickness of 5 nm to 1000 nm.

15. The optical product of claim 1, in the form of a window film that is applied to a vehicle.

16. The optical product of claim 13, wherein the vehicle is an automobile, an aircraft, or a boat.

17. The optical product of claim 1, in the form of a window film applied to a building.

18. The optical product of claim 2, wherein the optical product is a composite interlayer for laminated glass.

19. The optical product of claim 16 wherein said optical product has a visible light transmission of no less than 40%.

20. The optical product of claim 16, wherein said optical product has a visible light transmission of no less than 60%.