Conductive film

Abstract

A conductive film which is excellent in moist heat resistance, conductivity, transparency and coating film strength includes a base film and a coating layer formed on the base film by curing a composition including: (i) a conducting polymer containing a polycationic polythiophene having a recurring unit represented by the following formula (1) as the main constituent and a polyanion (component A): (ii) a water-soluble compound having at least one hydrophilic group selected from the group consisting of oxyethylene group and sulfonate group (component B); and (iii) a crosslinking agent having a glycidyl group (component C), and which has a surface resistance change rate after it is treated at a temperature of 60° C. and a humidity of 90% for 240 hours of 160% or less.

1 . A conductive film having a base film and a coating layer formed on at least one side of the base film by curing a composition comprising:
 (i) a conducting polymer containing a polycationic polythiophene having a recurring unit represented by the following formula (1) as the main constituent and a polyanion (component A):   
       
         
           
           
               
               
           
         
         wherein R 1  and R 2  are each independently a hydrogen atom or alkyl group having 1 to 4 carbon atoms or bonded together to form an alkylene group having 1 to 12 carbon atoms which may be substituted arbitrarily; 
         (ii) 10 to 1,000 parts by mass of a water-soluble compound having at least 3 photocurable functional groups and 10 to 30 oxyethylene groups in the molecule based on 100 parts by mass of component A (component B-1); and 
         (iii) 10 to 1,000 parts by mass of an alkoxysilane compound having a glycidyl group based on 100 parts by mass of component A (component C-1), and 
         which has a surface resistance change rate after it is treated at a temperature of 60° C. and a humidity of 90% for 240 hours of 150% or less. 
       
     
     
         2 . The conductive film according to  claim 1 , wherein the photocurable functional group is a (meth)acrylate group. 
     
     
         3 . The conductive film according to  claim 1  which has a total light transmittance of 60% or more and a surface resistance of 10 to 1×10 4 Ω/□. 
     
     
         4 . The conductive film according to  claim 1  which has an anchor coat layer containing a polyester resin and an acrylic resin having an oxazoline group and a polyalkylene oxide chain between the base film and the coating layer. 
     
     
         5 . The conductive film according to  claim 1 , wherein the base film is either one of a polyethylene terephthalate film and a polyethylene naphthalene dicarboxylate film.