Infrared-reflecting optically transparent assembly and method of making the same

Patent metadata

Field	Value
Publication number	US-11065855-B2
Application number	US-201716468808-A
Country	US
Kind code	B2
Filing date	Dec 13, 2017
Priority date	Dec 16, 2016
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A method of making an infrared-reflecting optically transparent assembly comprises: coating a curable composition onto a major surface of an optically transparent thermoplastic polymer film; at least partially curing the curable composition, which may be optionally at least partially dried, to provide a thermoformable composite film; and laminating the thermoformable composite film to an infrared-reflecting multilayer optical film to provide the infrared-reflecting optically transparent assembly. The curable composition comprises urethane (meth)acrylate compound, (meth)acrylate monomer, and silicone (meth)acrylate. The infrared-reflecting optically transparent assembly and methods of including it in an infrared-reflecting lens assembly are also disclosed.

First claim

What is claimed is:

1. An infrared-reflecting optically transparent assembly comprising:
a first optically transparent thermoplastic polymer film having first and second opposed major surfaces;
a first protective coating disposed on at least a portion of the first major surface of the first optically transparent thermoplastic polymer film, wherein the first protective coating comprises an at least partially cured first composition comprising:
a) 70 to 95 weight percent of urethane (meth)acrylate compound having an average (meth)acrylate functionality of 3 to 9, based on the total weight of components a) to d);
b) 2 to 20 weight percent (meth)acrylate monomer having a (meth)acrylate functionality of 1 to 2, based on the total weight of components a) to d), wherein the (meth)acrylate monomer is not a urethane (meth)acrylate compound;
c) 0.5 to 2 weight percent of silicone (meth)acrylate, based on the total weight of components a) to d); and
d) optional effective amount of photoinitiator; and

a first major surface of an infrared-reflecting multilayer optical film securely bonded to at least a portion of the second major surface of the first optically transparent thermoplastic polymer film.

2. The infrared-reflecting optically transparent assembly of claim 1 , wherein the urethane (meth)acrylate compound has an average (meth)acrylate functionality of 4 to 7.

3. The infrared-reflecting optically transparent assembly of claim 1 , wherein the thermoplastic polymer film comprises a polycarbonate.

4. The infrared-reflecting optically transparent assembly of claim 1 , wherein component d) is present in the curable composition.

5. The infrared-reflecting optically transparent assembly of claim 1 , wherein component b) comprises at least one of 1,6-hexanediol di(meth)acrylate or an alkoxylated tetrahydrofurfuryl (meth)acrylate.

6. The infrared-reflecting optically transparent assembly of claim 1 , wherein in component a) the urethane (meth)acrylate compound includes at least one of an isocyanurate ring or a biuret group.

7. The infrared-reflecting optically transparent assembly of claim 1 , further comprising:
a second optically transparent thermoplastic polymer film securely bonded to a second major surface of the infrared-reflecting multilayer optical film opposite the first optically transparent thermoplastic polymer film.

8. The infrared-reflecting optically transparent assembly of claim 1 , wherein the infrared-reflecting optically transparent assembly is shaped into the contour of a lens surface.

9. The infrared-reflecting optically transparent assembly of claim 8 , wherein the infrared-reflecting optically transparent assembly is coextensive with the lens surface.

10. An infrared-reflecting lens assembly comprising:
the infrared-reflecting optically transparent assembly of claim 8 secured to a thermoplastic polymer lens.

11. A method of making an infrared-reflecting optically transparent assembly, the method comprising steps:
i) providing a curable composition comprising components:
a) 70 to 95 weight percent of urethane (meth)acrylate compound having an average (meth)acrylate functionality of 3 to 9, based on the total weight of components a) to d);
b) 2 to 20 weight percent (meth)acrylate monomer having a (meth)acrylate functionality of 1 to 2, based on the total weight of components a) to d), wherein the (meth)acrylate monomer is not a urethane (meth)acrylate compound;
c) 0.5 to 2 weight percent of silicone (meth)acrylate, based on the total weight of components a) to d);
d) optional effective amount of photoinitiator; and
e) optional solvent;

ii) coating the curable composition onto a major surface of an optically transparent thermoplastic polymer film;
iii) optionally at least partially drying the curable composition to provide an at least partially dried curable composition;
iv) at least partially curing the curable composition or the at least partially dried curable composition to provide a thermoformable composite film; and
v) laminating the thermoformable composite film to an infrared-reflecting multilayer optical film to provide the infrared-reflecting optically transparent assembly.

12. The method of claim 11 , wherein the urethane (meth)acrylate compound has an average (meth)acrylate functionality of 4 to 7.

13. The method of claim 11 , wherein the thermoplastic polymer film comprises a polycarbonate.

14. The method of claim 11 , wherein component d) is present in the curable composition.

15. The method of claim 11 , wherein component e) is present in the curable composition.

16. The method of claim 11 , wherein component b) comprises at least one of 1,6-hexanediol di(meth)acrylate or an alkoxylated tetrahydrofurfuryl (meth)acrylate.

17. The method of claim 11 , wherein in component a) the urethane (meth)acrylate compound includes at least one of an isocyanurate ring or a biuret group.

18. The method of claim 11 , further comprising:
vi) shaping the infrared-reflecting optically transparent assembly.

19. The method of claim 18 , wherein said shaping comprises thermoforming.

20. A method of making an infrared-reflecting lens assembly, the method comprising steps:
placing an infrared-reflecting optically transparent assembly according to claim 8 into a lens-shaped injection mold cavity;
injecting molten thermoplastic polymer into the injection mold cavity; and
removing the infrared-reflecting lens assembly from the injection mold cavity.

Assignees

• 3M Innovative Properties Co

Inventors

• Klun Thomas P
• Pokorny Richard J
• Coonce Benjamin R
• Dunn Douglas S
• Ambur Gregg A
• Kostalik Iv Henry A
• Jacobson John R
• Degraw Christopher S
• Zhang Chunjie

Classifications

• B32B2551/00

  Optical elements · CPC title

• G02B5/26

  Reflecting filters (G02B5/28 takes precedence) · CPC title

• C08F290/067

  Polyurethanes; Polyureas · CPC title

• B32B2307/40

  having particular optical properties · CPC title

• C08G18/7831

  containing biuret groups · CPC title