Pressure-sensitive adhesive composition, pressure-sensitive adhesive layer, pressure-sensitive adhesive-layer-attached polarizing film, and image display device

Abstract

A pressure-sensitive adhesive composition is disclosed making it possible that even when a polarizing film and a transparent conductive layer are laminated over each other to interpose a pressure-sensitive adhesive layer there between, this pressure-sensitive adhesive layer is formed as a pressure-sensitive adhesive layer capable of restraining the transparent conductive layer from being corroded, and further restraining a rise in the surface resistance of the transparent conductive layer, and a deterioration in the external appearance of this layer. Also disclosed are a pressure-sensitive adhesive layer made from the pressure-sensitive adhesive composition, a pressure-sensitive-adhesive-layer-attached polarizing film, and an image display device using the pressure-sensitive-adhesive-layer-attached polarizing film. The pressure-sensitive adhesive composition includes a (meth)acryl-based polymer (A) and a conductive agent (B) having a molecular weight of 380 or more.

What is claimed is: 
     
         1 . A constitution comprising a pressure-sensitive adhesive layer and a transparent conductive layer being bonded to the pressure-sensitive adhesive layer,
 wherein the pressure-sensitive adhesive layer is made from a pressure-sensitive adhesive composition comprising a (meth)acryl-based polymer (A) and a conductive agent (B) having a molecular weight of 380 or more, and wherein the transparent conductive layer comprises an aluminum-based metal mesh.   
     
     
         2 . The constitution according to  claim 1 , wherein the conductive agent (B) is an ionic compound having an anionic component and a cationic component, and the total number of carbon atoms in the anionic component is 6 or more. 
     
     
         3 . The constitution according to  claim 2 , wherein the total number of carbon atoms in the cationic component of the conductive agent (B) is 6 or more. 
     
     
         4 . The constitution according to  claim 1 , wherein the (meth)acryl-based polymer (A) comprises, as monomers for its monomer units, one or more monomers selected from the group consisting of carboxyl-group-containing monomers, hydroxyl-group-containing monomers and amide-group-containing monomers, and an alkyl (meth)acrylate. 
     
     
         5 . The constitution according to  claim 1 , wherein the conductive agent (B) has a molecular weight of 600 or more. 
     
     
         6 . An image display device, comprising the constitution according to  claim 1 .