Benzyl (meth)acrylate monomers suitable for microstructured optical films

Patent metadata

Field	Value
Publication number	US-2018106928-A1
Application number	US-201715841028-A
Country	US
Kind code	A1
Filing date	Dec 13, 2017
Priority date	May 13, 2011
Publication date	Apr 19, 2018
Grant date	—

Abstract

Presently described are optical films comprising a polymerized (e.g. microstructured) surface that comprises the reaction product of a polymerizable resin composition and polymerizable resin compositions that comprise nanoparticles; at least one first monomer comprising at least two (meth)acrylate groups; and at least one second (meth)acrylate monomer having the structure

wherein at least one R1 comprises an aromatic substituent,

t is an integer from 1 to 4, and

R2 is hydrogen or methyl.

First claim

What is claimed is:

1 . An optical film comprising a polymerized microstructured surface that comprises the reaction product of a polymerizable resin composition comprising
nanoparticles; at least one first monomer comprising at least two (meth)acrylate groups; and at least one second (meth)acrylate monomer having the structure

wherein at least one R1 comprises an aromatic substituent,
t is an integer from 1 to 4, and
R2 is hydrogen or methyl.

2 . The optical film of claim 1 wherein t is 1.

3 . The optical film of claim 1 wherein R1 is selected from the group consisting

4 . The optical film of claim 1 wherein the monomer has a refractive index of at least 1.54.

5 . The optical film of claim 1 wherein the monomer has a viscosity of less than 100 cps at 25° C.

6 . The optical film of claim 1 wherein the first monomer comprises at least two aromatic rings.

7 . The optical film of claim 6 wherein the first monomer is a bisphenol, fluorene or biphenyl (meth)acrylate monomer.

8 . The optical film of claim 1 wherein the polymerizable resin comprises up to 15 wt-% of one or more first monomers comprising at least two (meth)acrylate groups.

9 . The optical film of claim 1 wherein the first monomer comprising at least two (meth)acrylate groups has a molecular weight of at least 350 g/mole.

10 . The optical film of claim 1 wherein the polymerizable resin composition is non-halogenated.

11 . The optical film of claim 1 wherein the nanoparticles have a refractive index of at least 1.60.

12 . The optical film of claim 11 wherein the nanoparticles comprise zirconia.

13 . The optical film of claim 11 wherein the polymerizable resin comprises at least 40 wt-% nanoparticles.

14 . The optical film of claim 1 wherein the optical film is a brightness enhancing film.

15 . The optical film of claim 14 wherein the brightness enhancing film has a single sheet relative gain of at least 1.75.

16 . An optical film comprising a polymerized surface that comprises the reaction product of a polymerizable resin composition comprising
nanoparticles; at least one first monomer comprising at least two (meth)acrylate groups; and at least one second (meth)acrylate monomer having the structure

wherein at least one R1 comprises an aromatic substituent,
t is an integer from 1 to 4, and
R2 is hydrogen or methyl.

17 . A polymerizable resin composition comprising
nanoparticles; at least one first monomer comprising at least two (meth)acrylate groups; and at least one second (meth)acrylate monomer having the structure

wherein at least one R1 comprises an aromatic substituent,
t is an integer from 1 to 4, and
R2 is hydrogen or methyl.

Assignees

• 3M Innovative Properties Co

Inventors

• Hunt Bryan V
• Lindstrom Kyle J
• Nelson Maureen C

Classifications

• C08K3/22

  of metals · CPC title

• C08K2003/2244

  of zirconium · CPC title

• G02B1/04 Primary

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title

• C09D133/06

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

• C08J7/16

  with polymerisable compounds · CPC title