Optical device with antistatic coating

Abstract

Optical devices comprising at least one optical layer and at least one antistatic layer disposed on at least one surface of the optical layer wherein the antistatic layer comprises the reaction product of: (a) at least one polymerizable onium salt; and (b) at least one polymerizable, non-onium, silicone or perfluoropolyether moiety-containing monomer, oligomer, or polymer.

1 . An optical device comprising at least one optical layer and at least one antistatic layer disposed on at least one surface of said optical layer wherein said antistatic layer comprises the reaction product of (a) at least one polymerizable onium salt and (b) at least one non-onium polymerizable silicone or perfluoropolyether moiety-containing monomer, oligomer, or polymer. 
     
     
         2 . The optical device of  claim 1  wherein said onium salt comprises an onium salt having a fluoroorganic anion. 
     
     
         3 . The optical device of  claim 1  wherein said onium salt is selected from the group consisting of ammonium salts, sulfonium salts, phosphonium salts, pyridinium salts, and imadasolium salts. 
     
     
         4 . The optical device of  claim 1  wherein said onium salt has the formula:
   (R 1 ) a-b G[(CH 2 ) q DR 2 ] b X −   
 
       wherein
 each R 1  comprises independently an alkyl, alicyclic, aryl, alkalicyclic, alkaryl, alicyclicalkyl, aralicyclic, or alicyclicaryl moiety, wherein such moieties may comprises one or more heteroatoms such as for example, nitrogen, oxygen, or sulfur, or may comprise phosphorus, or a halogen (and thus can be fluoroorganic in nature); 
 G is nitrogen, sulfur or phosphorous; 
 a is 3 where G is sulfur and a is 4 where G is nitrogen or phosphorous then; 
 b is an integer of 1 to 3 where G is sulfur and b is an integer of 1 to 4 where G is nitrogen or phosphorous; 
 q is an integer from 1 to 4; 
 D is oxygen, sulfur, or NR wherein R is H or a lower alkyl of 1 to 4 carbon atoms; 
 R 2  is a (meth)acryl; and 
 X −  is an anion. 
 
     
     
         5 . The optical device of  claim 4  wherein X −  is an anion selected from the group consisting of alkyl sulfates, methane sulfonates, tosylates, fluoroorganics, fluoroinorganics, and halides. 
     
     
         6 . The optical device of  claim 4  wherein X −  is a fluorochemical anion. 
     
     
         7 . The optical device of  claim 4  wherein X −  is selected from the group consisting of —C(SO 2 CF 3 ) 3 , —O 3 SCF 3 , —O 3 SC 4 F 9 , and —N(SO 2 CF 3 ) 2 . 
     
     
         8 . The optical device of  claim 1  wherein the onium salt has one of the following formulas: 
       
         
           
           
               
               
           
         
       
     
     
         9 . The optical device of  claim 1  wherein said polymerizable silicone monomer, oligomer, or polymer is a material having a polydimethylsiloxane (PDMS) backbone and an alkoxy side chain with a terminal (meth)acrylate group. 
     
     
         10 . The optical device of  claim 1  wherein said optical layer is selected from the group consisting of reflective polarizers, brightness enhancement films, and diffuse reflecting polarizing films. 
     
     
         11 . The optical device of  claim 1  wherein said antistatic layer is an outer layer. 
     
     
         12 . The optical device of  claim 1  wherein said antistatic layer has matte properties. 
     
     
         13 . The optical device of  claim 1  wherein said antistatic layer further comprises beads or particles. 
     
     
         14 . The optical device of  claim 1  wherein said antistatic layer comprises the reaction product of (a), (b), and (c) at least one non-onium polymerizable non-silicone monomer, oligomer, or polymer. 
     
     
         15 . The optical device of  claim 1  wherein said antistatic layer is formed by: (1) providing a liquid coating composition comprising (a) said at least one onium salt, (b) said at least one non-onium polymerizable silicone or perfluoropolyether moiety-containing monomer, oligomer, or polymer, and optionally (c) at least one non-silicone, nonperfluoropolyether monomer, oligomer, or polymer; (2) applying said liquid coating composition to the surface of said optical layer; and (3) curing said liquid coating composition in situ to form said antistatic layer.