Hydrophilic material and process for producing the same

Abstract

The present invention relates to a hydrophilic substance production method characterized in that polyvinylpyrrolidone-containing material wetted with an aqueous solution of a cationic polymer is treated with radiation. The invention makes it possible to produce material for blood treatment that prevents adsorption of blood platelets.

1 . A hydrophilic substance production method characterized in that polyvinylpyrrolidone-containing material wetted with an aqueous solution of a cationic polymer is treated with radiation.  
     
     
         2 . A hydrophilic substance production method according to  claim 1  wherein the content of said cationic polymer in said solution is 0.1 wt % or more.  
     
     
         3 . A hydrophilic substance production method according to  claim 1  wherein said cationic polymer is a polymer containing an amino group.  
     
     
         4 . A hydrophilic substance production method according to  claim 3  wherein said polymer containing an amino group is one or more selected from the group of polyethyleneimine, diethylaminoethyl dextran, and their derivatives.  
     
     
         5 . A hydrophilic substance production method according to  claim 1  wherein said polyvinylpyrrolidone-containing material contains both polyvinylpyrrolidone and a polysulfone-based polymer.  
     
     
         6 . A hydrophilic substance production method according to  claim 1  wherein the product is in the form of a hollow fiber membrane.  
     
     
         7 . A hydrophilic substance production method according to  claim 1  wherein the product is a separation membrane for artificial kidneys.  
     
     
         8 . A hydrophilic substance characterized in that it consists mainly of polyvinylpyrrolidone-containing material and a cationic polymer.  
     
     
         9 . A hydrophilic substance characterized in that said polyvinylpyrrolidone-containing material and said cationic polymer are in a water-insoluble state.  
     
     
         10 . A hydrophilic substance produced by a method according to  claim 1 .  
     
     
         11 . An artificial kidney containing a hydrophilic substance according to  claim 10.