Dual-cure nanostructure transfer film

Patent metadata

Field	Value
Publication number	US-2016288450-A1
Application number	US-201514674819-A
Country	US
Kind code	A1
Filing date	Mar 31, 2015
Priority date	Mar 31, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

A transfer film includes a template layer having a first major surface and an opposing second major surface. The second major surface includes a structured non-planar release surface. A backfill layer is disposed upon and conforms to the non-planar structured surface. The backfill layer includes a first cross-linked polymer and a plurality of multifunctional monomers, which cure via different and independent curing mechanisms.

First claim

What is claimed is:

1 . A transfer film comprising:
a template layer having a first major surface and an opposing second major surface, the second major surface comprising a structured non-planar release surface; a backfill layer disposed upon and conforming to the non-planar structured surface, the backfill layer comprising: a cross-linked epoxy polymer; and a plurality of multifunctional acrylate monomers.

2 . The transfer film according to claim 1 , wherein the cross-linked epoxy polymer and the multifunctional acrylate monomers have different and independent curing mechanisms and the backfill layer comprises a cationic initiator and a free-radical initiator.

3 . The transfer film according to claim 1 , wherein the backfill layer comprises a molecule having acrylate and epoxy functionalities.

4 . The transfer film according to claim 1 , wherein the transfer film has a glass transition temperature value that is less than 25 degrees centigrade.

5 . The transfer film according to claim 1 , wherein the cross-linked epoxy polymer comprises cycloaliphatic multifunctional epoxy groups.

6 . The transfer film according to claim 1 , wherein the multifunctional acrylate monomers comprises cycloaliphatic multifunctional acrylate groups.

7 . The transfer film according to claim 1 , wherein the cross-linked epoxy polymer has epoxy moieties that are curable via a cationic mechanism and the multifunctional acrylate monomers are curable via a free-radical mechanism.

8 . The transfer film according to claim 1 , further comprising a release liner disposed on a planar major surface of the back fill layer wherein the backfill layer is between the release liner and the structured non-planar release surface.

9 . A transfer film comprising:
a template layer having a first major surface and an opposing second major surface, the second major surface comprising a structured non-planar release surface; a backfill layer disposed upon and conforming to the non-planar structured surface, the backfill layer comprising: a cross-linked acrylate polymer; a plurality of multifunctional epoxide monomers.

10 . The transfer film according to claim 9 , wherein the cross-linked acrylate polymer and the multifunctional epoxide monomers have different and independent curing mechanisms and the backfill layer comprises a cationic initiator and a free-radical initiator.

11 . The transfer film according to claim 9 , wherein the backfill layer comprises a molecule having acrylate and epoxy functionalities.

12 . The transfer film according to claim 9 , wherein the transfer film has a glass transition temperature value that is less than 25 degrees centigrade.

13 . The transfer film according to claim 9 , wherein the cross-linked acrylate polymer comprises multifunctional cycloaliphatic acrylate groups.

14 . The transfer film according to claim 9 , wherein the multifunctional epoxy monomers comprises multifunctional cycloaliphatic epoxy groups.

15 . The transfer film according to claim 9 , wherein the cross-linked acrylate polymer has acrylate moieties that are curable via a free-radical mechanism and the multifunctional epoxy monomers are curable via a cationic mechanism.

16 . The transfer film according to claim 9 , further comprising a release liner disposed on a planar major surface of the back fill layer wherein the backfill layer is between the release liner and the structured non-planar release surface.

17 . An article comprising:
a transfer film according to claim 1 disposed on a receptor substrate.

18 . An article according to claim 17 , wherein the receptor substrate comprises glass or sapphire.

19 . An article according to claim 17 , wherein the receptor substrate comprises an organic light emitting diode color filter element.

20 . An article comprising:
a transfer film according to claim 9 disposed on a receptor substrate.

21 . An article according to claim 20 , wherein the receptor substrate comprises glass or sapphire.

22 . An article according to claim 20 , wherein the receptor substrate comprises an organic light emitting diode color filter element.

23 . An article comprising:
a receptor substrate having a receptor surface; a light transmission layer having a first major surface adhered to the receptor surface and an opposing second major surface having a structured non-planar surface, the light transmission layer comprising: an interpenetrating network of a cross-linked epoxy polymer and a cross-linked acrylate polymer; and a plurality of compatibilizer molecules having an acrylate group bonded to the cross-linked acrylate polymer and an epoxy group bonded to the cross-linked epoxy polymer; the light transmission layer having a haze value of less than 2% and a visible light transmission greater than 85% and a decomposition temperature greater than 250 degrees centigrade.

24 . The article according to claim 23 , wherein the cross-linked epoxy polymer comprises multifunctional cycloaliphatic epoxy groups.

25 . The article according to claim 23 , wherein the cross-linked acrylate polymer comprises multifunctional cycloaliphatic acrylate groups.

26 . The article according to claim 23 , wherein the receptor substrate comprises an organic light emitting diode color filter element.

Assignees

• 3M Innovative Properties Co

Inventors

• Schwartz Evan L
• Hartmann-Thompson Claire
• Cheng Shijing
• Erickson Nicholas C

Classifications

• H10K71/40

  Thermal treatment, e.g. annealing in the presence of a solvent vapour · CPC title

• C08G59/1466

  Acrylic or methacrylic acids · CPC title

• B32B7/06 Primary

  permitting easy separation · CPC title

• B32B27/38

  comprising epoxy resins · CPC title

• B32B3/28 Primary

  characterised by a layer comprising a deformed thin sheet {, i.e. the layer having its entire thickness deformed out of the plane}, e.g. corrugated, crumpled (B32B29/08 takes precedence) · CPC title