Quantum dot article with improved edge ingress

Patent metadata

Field	Value
Publication number	US-9988559-B2
Application number	US-201415106372-A
Country	US
Kind code	B2
Filing date	Dec 17, 2014
Priority date	Dec 20, 2013
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A quantum dot film article includes a first barrier layer; a second barrier layer; and a quantum dot layer between the first barrier layer and the second barrier layer. The quantum dot layer has quantum dots dispersed in a matrix including a cured adhesive composition, wherein the adhesive composition includes: an epoxide; an amino-functional compound of Formula I: wherein A is a monocyclic or a polycyclic alkylene group, or a monocyclic or a polycyclic heteroalkylene group, and m and n are integers each independently selected from 0 to 5; and a radiation curable methacrylate compound.

First claim

The invention claimed is:

1. A quantum dot film article comprising:
a first barrier layer;
a second barrier layer; and
a quantum dot layer between the first barrier layer and the second barrier layer, the quantum dot layer comprising quantum dots dispersed in a matrix comprising a cured adhesive composition, wherein the adhesive composition comprises:
an epoxide;
an amino-functional compound of Formula I:
H 2 N—C n H 2n -A-C m H 2m —NH 2   Formula 1

wherein A is a monocyclic or a polycyclic alkylene group, or a monocylic or a polycyclic heteroalkylene group, and m and n are integers each independently selected from 0 to 5; and
a radiation curable methacrylate compound.

2. The film article of claim 1 , wherein the epoxide comprises a bisphenol-F backbone.

3. The film article of claim 1 , wherein the epoxide is a diepoxide.

4. The film article of claim 1 , wherein A in Formula I is the group of Formula II:

wherein R 1 , R 2 , R 3 , and R 4 , each represent either a hydrogen atom or a methyl group; x and y are each independently selected from 0 or 1; and the asterisks (*) represent attachment positions to Formula I.

5. The film article of claim 1 , wherein A in Formula I is the group of Formula III:

wherein R 5 and R 6 each represent either a hydrogen or a methyl group; x and y are each independently selected from 0 or 1, and the asterisks (*) represent the attachment positions to Formula I.

6. The film article of claim 1 , wherein the amino-functional compound is represented by any of the following:
(a) 3(or 4), 8(or 9)-diaminomethyltricyclo(5,2,1,0 2.6 ) decane:

(b) 4,9(or 10)-diaminomethyltetracyclo(6,2,1,1 3.6 ,0 2.7 ) dodecane:

or,
(c) 2,5(or 6)-diaminomethyl bicyclo(2,2,1)heptane:

7. The film article of claim 1 , wherein the adhesive composition further comprises a photoinitiator.

8. The film article of claim 1 , wherein the matrix comprises about 5 wt % to about 25 wt % of the methacrylate compound and 70 to 90 wt % of an epoxy polymer formed from the reaction of the epoxide and the amino-functional compound.

9. The film article of claim 1 , wherein the matrix further comprises scattering particles having an average size in a range from 1 to 10 micrometers.

10. The film article of claim 1 , wherein at least one of the first and the second barrier layer comprises at least one polymeric film.

11. The film article of claim 1 , wherein the matrix has a moisture and oxygen ingress of less than about 1.25 mm after 1 week at 85° C.

12. The film article of claim 1 , wherein the matrix has an oxygen permeation of less than about 80 (cc·mil)/(m 2 day).

13. The film article of claim 1 , wherein the matrix has a water vapor transmission rate of less than about 15 (20 g/m 2 ·mil·day).

14. A display device comprising the film article of claim 1 .

15. A method of forming a film article, comprising coating a quantum dot material on a first polymeric film, the quantum dot material comprising quantum dots in an adhesive composition comprising:
an epoxide;
an amino-functional compound of Formula I:
H 2 N—C n H 2n -A-C m H 2m —NH 2   Formula I

wherein A is a monocyclic or a polycyclic alkylene group, or a monocylic or a polycyclic heteroalkylene group, and m and n are integers each independently selected from 0 to 5;
a radiation curable methacrylate compound; and
a photoinitiator.

16. The method of claim 15 , further comprising curing the adhesive composition.

17. The method of claim 15 , further comprising applying a second polymeric film on the adhesive composition.

18. The method of claim 17 , further comprising curing the adhesive composition.

19. The method of claim 16 , wherein the adhesive composition is cured by applying to the composition heat and UV light.

20. An adhesive composition, comprising:
an epoxide;
an amino-functional compound of Formula I:
H 2 N—C n H 2n -A-C m H 2m —NH 2   Formula I

wherein A is a monocyclic or a polycyclic alkylene group, or a monocylic or a polycyclic heteroalkylene group, and m and n are integers each independently selected from 0 to 5;
a radiation curable methacrylate compound;
a photoinitiator; and
quantum dots.

21. An adhesive composition, comprising:
an epoxide;
an amino-functional compound of Formula I:
H 2 N—C n H 2n -A-C m H 2m —NH 2   Formula I

wherein A is a monocyclic or a polycyclic alkylene group, or a monocylic or a polycyclic heteroalkylene group, and m and n are integers each independently selected from 0 to 5; and
quantum dots.

22. The adhesive composition of claim 21 , further comprising a photoinitiator.

Assignees

• 3M Innovative Properties Co

Inventors

• Eckert Karissa L
• Nelson Eric W
• Mahoney Wayne S
• Caruso Dailey Mary M
• Mackey Sonja S

Classifications

• B32B27/18 Primary

  characterised by the use of special additives · CPC title

• B32B2457/202

  LCD, i.e. liquid crystal displays · CPC title

• B32B2255/26

  Polymeric coating · CPC title

• G02B6/005

  provided by one optical element, or plurality thereof, placed on the light output side of the light guide · CPC title

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title