Moisture resistant coating for barrier films

Patent metadata

Field	Value
Publication number	US-9254506-B2
Application number	US-82953510-A
Country	US
Kind code	B2
Filing date	Jul 2, 2010
Priority date	Jul 2, 2010
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

A barrier film having a substrate, a base polymer layer applied to the substrate, an oxide layer applied to the base polymer layer, and a top coat polymer layer applied to the oxide layer. An optional inorganic layer can be applied over the top coat polymer layer. The top coat polymer includes a silane and an acrylate co-deposited to form the top coat layer. The use of a silane co-deposited with an acrylate to form the top coat layer of the barrier films provide for enhanced resistance to moisture and improved peel strength adhesion of the top coat layer to the underlying barrier stack layers.

First claim

The invention claimed is:

1. A process for making a barrier film, comprising:
providing a substrate;
vapor depositing and curing a base polymer layer to the substrate;
applying an oxide layer to the base polymer layer;
forming a mixture comprising a cyclic azasilane and an acrylate; and
vapor depositing and curing the mixture to form a top coat polymer layer on the oxide layer, wherein the cyclic azasilane is N-n-butyl-aza-2,2-dimethoxysilacyclopentane, the acrylate is tricyclodecane dimethanol diacrylate and the mixture comprises the cyclic azasilane at about 3 weight percent of the acrylate.

2. A barrier film formed by the process of claim 1 .

3. The barrier film of claim 2 , further comprising a plurality of alternating layers of the base polymer layer and the oxide layer between the substrate and the top coat polymer.

4. The barrier film of claim 2 , wherein the substrate comprises a flexible transparent film.

5. The barrier film of claim 2 , wherein the base polymer layer comprises an acrylate smoothing layer.

6. The barrier film of claim 2 , wherein the oxide layer comprises a layer of an inorganic silicon aluminum oxide.

7. The barrier film of claim 2 , further comprising an inorganic layer applied to the top coat polymer layer.

8. The barrier film of claim 7 , wherein the inorganic layer comprises a layer of an inorganic silicon aluminum oxide.

9. The process of claim 1 , wherein the applying the oxide layer step comprises sputter depositing an oxide onto the base polymer layer to form the oxide layer.

10. The process of claim 1 , further comprising repeating the vapor depositing step and the applying step to apply a plurality of alternating layers of the base polymer layer and the oxide layer between the substrate and the top coat polymer layer.

11. The process of claim 1 , wherein the applying the oxide layer step comprises applying a layer of an inorganic silicon aluminum oxide to the base polymer layer.

12. The process of claim 1 , further comprising applying an inorganic layer to the top coat polymer layer.

13. The process of claim 12 wherein the applying the inorganic layer step comprises applying a layer of an inorganic silicon aluminum oxide.

Assignees

• Roehrig Mark A
• Nachtigal Alan K
• Weigel Mark D
• 3M Innovative Properties Co

Inventors

• Roehrig Mark A
• Nachtigal Alan K
• Weigel Mark D

Classifications

• C08J7/0423

  with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder · CPC title

• C23C14/34

  Sputtering · CPC title

• C23C14/10

  Glass or silica · CPC title

• B05D2252/02

  of indefinite length · CPC title

• Y10T428/31663

  As siloxane, silicone or silane · CPC title