Layer-by-layer assembled multilayer lamination transfer films

Patent metadata

Field	Value
Publication number	US-11247501-B2
Application number	US-201414470298-A
Country	US
Kind code	B2
Filing date	Aug 27, 2014
Priority date	Aug 27, 2014
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

Transfer films, articles made therewith, and layer-by-layer methods of making and using transfer films to form an inorganic optical stack are disclosed.

First claim

What is claimed is:

1. A transfer film comprising:
a protolayer stack including a first protolayer and a second protolayer, the first and second protolayers each having a uniform thickness of less than 1 micrometer and comprising a plurality of sub-protolayer pairs, each sub-protolayer pair formed by layer-by-layer self-assembly and independently comprising a material with a first bonding group and a material with a complementary second bonding group;
at least one of the materials in the sub-protolayer pairs of the first protolayer is a first thermally stable material comprising a first inorganic nanomaterial;
at least one of the materials in the sub-protolayer pairs of the second protolayer is a second thermally stable material comprising a second inorganic nanomaterial, wherein the first inorganic nanomaterial and second inorganic nanomaterial have a refractive index difference of at least 0.2; and
at least one of the materials in the sub-protolayer pairs of the first protolayer and the second protolayer comprises a sacrificial material,
wherein the transfer film further comprises a polymeric support layer, the polymeric support layer including a sacrificial material which remains on the protolayer stack following release from the polymeric support layer during the transfer process.

2. The transfer film according to claim 1 , wherein the protolayer has a visible light transmittance of at least 5%.

3. The transfer film according to claim 1 , wherein at least selected sub-protolayer pairs comprise inorganic nanomaterial having an average size of less than 100 nm.

4. The transfer film according to claim 1 , wherein the material with a first bonding group is a polycationic material and the material with a complementary second bonding group is a polyanionic material.

5. The transfer film according to claim 1 , wherein the material with a first bonding group is a hydrogen bond donor and the material with a complementary second bonding group is a hydrogen bond acceptor.

6. The transfer film according to claim 1 , wherein the first thermally stable material is present in the first protolayer in an amount of at least 50 wt %.

7. A method, comprising:
laminating a transfer film according to claim 1 to a receptor substrate;
baking out the sacrificial material in the protolayer to form an optical stack having one or more layers.

8. The method according to claim 7 , wherein the receptor substrate comprises glass, quartz or sapphire.

9. The method according to claim 7 , wherein the each layer of the optical stack has a uniform thickness of less than 500 nanometers.

10. The method according to claim 7 , wherein the optical stack has a visible light transmittance of at least 10%.

11. The method according to claim 7 , wherein the optical stack comprises at least 4 layers.

12. The transfer film of claim 1 ,
wherein one of the materials in each sub-protolayer pair comprises a sacrificial material, and
wherein after removal of the sacrificial materials by bake-out the transfer film is suitable for use an antireflective film having a transmittance of at least 90%.

13. The transfer film of claim 1 , wherein the sacrificial material is at least one of poly(methyl methacrylate) and poly(ethyl acrylate-co-methyl methacrylate).

14. The transfer film of claim 1 , wherein the transfer film further comprises an adhesive layer.

Assignees

• 3M Innovative Properties Co

Inventors

• Schmidt Daniel J
• Pellerite Mark J
• Wolk Martin B
• Johnson Stephen A

Classifications

• B44C1/165

  for decalcomanias; sheet material therefor (apparatus or machines for applying decalcomanias B65C) · CPC title

• B41M5/502 Primary

  characterised by structural details, e.g. multilayer materials (supports, backcoats or intermediate layers for thermal dye transfer donor and receiver sheets B41M5/41, B41M5/42) · CPC title

• G02F1/3618

  Langmuir Blodgett Films · CPC title

• B29D11/0073 Primary

  Optical laminates · CPC title

• G02F2202/027

  Langmuir-Blodgett film · CPC title