Articles and methods comprising polyacrylate primer with nitrogen-containing polymer

Patent metadata

Field	Value
Publication number	US-10113089-B2
Application number	US-201415023934-A
Country	US
Kind code	B2
Filing date	Sep 24, 2014
Priority date	Oct 2, 2013
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

Articles are described such as optical films and optical film stacks 2000 . The articles include a substrate 2070 and a primer layer 2075 disposed on the substrate wherein the primer layer comprises a polyacrylate and a nitrogen-containing polymer. The article further includes an adhesive layer 2060 disposed onto the primer layer wherein the adhesive layer comprises a polyacrylate component. In some embodiments, the adhesive is further bonded to a second substrate 2010 or a release liner.

First claim

What is claimed is:

1. An optical film stack comprising:
a first optical film bonded to a microstructured surface layer comprising microstructured prisms, of a second optical film with a cured adhesive layer comprising an interpenetrating network of the reaction product of a polyacrylate and polymerizable monomer; wherein the second optical film further comprises a primer layer disposed between the cured adhesive layer and the microstructured surface layer of the second optical film and the primer layer consists essentially of a polyacrylate and a nitrogen-containing polymer, and wherein at least a portion of the prisms comprise a post extending from an apex of the prisms that functions as a optically non-active bonding portion.

2. The optical stack of claim 1 wherein the optical stack has an optical gain of at least 1.8.

3. The optical stack of claim 1 wherein the separation between the cured adhesive layer and the first surface provides an air interface.

4. The optical stack of claim 1 wherein the cured adhesive layer has an elastic modulus ranging from 100 to 2000 MPa at 25° C.

5. The optical stack of claim 1 wherein the nitrogen-containing polymer comprises at least one nitrogen atom comprising a free pair of electrons.

6. The optical stack of claim 1 wherein the cured adhesive layer is free of a nitrogen-containing monomer or polymer.

7. The optical stack of claim 1 wherein the primer layer consisting essentially of a polyacrylate and a nitrogen-containing polymer, consists essentially of up to 5 wt-% of nitrogen-containing polymer.

8. The optical stack of claim 1 wherein the nitrogen-containing polymer is a homopolymer or copolymer of vinylcaprolactam, vinylpyrollidone, or a combination thereof.

9. The optical stack of claim 1 wherein the polymerizable monomer of the adhesive layer comprises a monomer comprising cationically polymerizable groups having a molecular weight less than 150 g/mole per cationically polymerizable group.

10. The optical stack of claim 9 wherein the cured adhesive layer further comprises a photoactivated cationic initiator.

11. The optical stack of claim 1 wherein the polymerizable monomer of the cured adhesive layer is an epoxy resin.

12. The optical stack of claim 1 wherein the cured adhesive layer comprises about 35 wt-% to about 75 wt-% of the polyacrylate.

13. The optical stack of claim 1 wherein the primer layer consisting essentially of a polyacrylate and a nitrogen-containing polymer, consists essentially of at least 75 wt-% of the polyacrylate.

Assignees

• 3M Innovative Properties Co

Inventors

• Edmonds William F
• Petaja Jason S
• Solomon Jeffrey L

Classifications

• C09J2203/318

  for the production of liquid crystal displays · CPC title

• C09J2463/00

  Presence of epoxy resin · CPC title

• C09J7/50 Primary

  characterised by a primer layer between the carrier and the adhesive · CPC title

• Y10T428/24612

  Composite web or sheet · CPC title

• C09J133/06

  of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical · CPC title