Highly stable quantum dot-containing polymer films

Patent metadata

Field	Value
Publication number	US-10246633-B2
Application number	US-201715429845-A
Country	US
Kind code	B2
Filing date	Feb 10, 2017
Priority date	Feb 12, 2016
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

Highly stable films containing semiconductor nanoparticles (“quantum dots”) are prepared from resins containing a fast-curing inner phase having a high glass transition temperature (T g ) and certain inner phase/outer phase combinations. The resins may comprise an inner phase and outer phase (but may appear to be a single phase due to their homogeneous appearance when viewed using an optical microscope). The method provides a highly scalable and cost-effective procedure for preparing films that are resistant to light, elevated temperatures, moisture, and oxygen.

First claim

What is claimed is:

1. A film comprising:
a plurality of semiconductor nanoparticles dispersed in a cured inner phase that comprises lauryl methacrylate and trimethylolpropane trimethacrylate; and,
an outer phase that comprises an acrylate-functionalized silica nanoparticle resin.

2. The film recited in claim 1 additionally comprising:
an oxygen-barrier film.

3. A film comprising:
a plurality of semiconductor nanoparticles dispersed in a cured inner phase that comprises lauryl methacrylate and trimethylolpropane trimethacrylate; and,
an outer phase that comprises a monofunctional adhesion-promoting acrylic oligomer and a tricyclodecane dimethanol diacrylate.

4. The film recited in claim 3 wherein the outer phase comprises substantially equal amounts of the monofunctional adhesion-promoting acrylic oligomer and the tricyclodecane dimethanol diacrylate.

5. The film recited in claim 3 additionally comprising:
an oxygen-barrier film.

6. The film recited in claim 3 wherein the semiconductor nanoparticles comprise red-emitting quantum dots.

7. The film recited in claim 3 wherein the semiconductor nanoparticles comprise red-emitting quantum dots and green-emitting quantum dots.

8. A film comprising:
a plurality of semiconductor nanoparticles dispersed in an inner phase that comprises isobornyl acrylate and,
an outer phase that comprises a resin that provides a phase separation from the inner phase.

9. The film recited in claim 8 wherein the outer phase comprises an acrylate-functionalized silica nanoparticle resin.

10. The film recited in claim 8 wherein the outer phase comprises a bisphenol A epoxy diacrylate oligomer and 2-hydroxyethyl acrylate.

11. The film recited in claim 10 wherein the outer phase comprises about 80% bisphenol A epoxy diacrylate oligomer and about 20% 2-hydroxyethyl acrylate.

12. The film recited in claim 8 wherein the inner phase additionally comprises lauryl acrylate.

13. The film recited in claim 8 wherein the outer phase comprises an acrylate-functionalized silica nanoparticle resin and the inner phase consists essentially of isobornyl acrylate and semiconductor nanoparticles.

14. The film recited in claim 13 further comprising about 1% by weight of a photo-initiator.

15. The film recited in claim 14 wherein the photo-initiator is bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide.

16. The film recited in claim 8 wherein the inner phase additionally comprises a stabilizing additive.

Assignees

• Nanoco Technologies Ltd

Inventors

• Pillay Narrainen Amilcar
• Vo Cong-Duan
• Naasani Imad
• Ali Abu Mohammad Imroz

Classifications

• B32B27/18

  characterised by the use of special additives · CPC title

• C09K11/08

  containing inorganic luminescent materials · CPC title

• C09K11/025 Primary

  non-luminescent particle coatings or suspension media · CPC title

• C09K11/02 Primary

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title