Planographic printing plate precursor, substrate for the same and surface hydrophilic material

Abstract

A planographic printing plate precursor comprises a substrate having disposed thereon a hydrophilic layer which includes hydrophilic graft chains and a crosslinked structure formed through hydrolytic polycondensation of an alkoxide of an element selected from Si, Ti, Zr and Al. An aluminum substrate for a planographic printing plate includes a hydrophilic surface which is formed by a hydrophilic polymer including a functional group that chemically bonds to the aluminum substrate directly or is chemically bindable to the aluminum substrate via structural component having a crosslinking structure. A surface-hydrophilic member comprises a substrate having disposed thereon a hydrophilic layer, wherein the hydrophilic layer includes hydrophilic graft chains and a crosslinked structure formed through hydrolytic polycondensation of an alkoxide of an element selected from Si, Ti, Zr and Al.

1 . A surface-hydrophilic member comprising a substrate having disposed thereon a hydrophilic layer, wherein the hydrophilic layer includes hydrophilic graft chains and a crosslinked structure formed through hydrolytic polycondensation of an alkoxide of an element selected from Si, Ti, Zr and Al, wherein the hydrophilic layer includes a polymer compound represented by the following general formula (I):  
       General Formula (I)  
       
         
           
           
               
               
           
         
         wherein each of R 1 , R 2 , R 3  and R 4  independently represents a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms; m is an integer of 0 to 2; n is an integer of 1 to 8; L represents a single bond or an organic linking group; Y represents —NHCOR 5 , —CONH 2 , —CON(R 5 ) 2 , —COR 5 , —OH, —CO 2 M or —SO 3 M; R 5  represents an alkyl group having 1 to 8 carbon atoms; and M represents one of a hydrogen atom, an alkali metal, an alkaline earth metal and an onium.  
       
     
     
         2 . The surface-hydrophilic member according to  claim 1 , wherein the hydrophilic layer is obtained by preparing a coating liquid composition comprising the following general formula (I) and applying the liquid composition on the substrate:  
       General Formula (I)  
       
         
           
           
               
               
           
         
       
       wherein each of R 1 , R 2 , R 3  and R 4  independently represents a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms; m is an integer of 0 to 2; n is an integer of 1 to 8; L represents a single bond or an organic linking group; Y represents —NHCOR 5 , —CONH 2 , —CON(R 5 ) 2 , —COR 5 , —OH, —CO 2 M or —SO 3 M; R 5  represents an alkyl group having 1 to 8 carbon atoms; and M represents one of a hydrogen atom, an alkali metal, an alkaline earth metal and an onium.  
     
     
         3 . The surface-hydrophilic member according to  claim 2 , wherein the coating liquid composition further comprises a hydrolyzable compound represented by the following general formula (II):  
       General Formula (II)  
         (R 6 ) m —X—(OR 7 ) 4-m    
       wherein each of R 6  and R 7  independently represents an alkyl group or an aryl group; X represents Si, Al, Ti or Zr; and m is an integer of 0 to 2.