US2004242726A1PendingUtilityA1

Pigment dispersion and ink composition for ink-jet

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Priority: May 16, 2002Filed: May 16, 2003Published: Dec 2, 2004
Est. expiryMay 16, 2022(expired)· nominal 20-yr term from priority
Inventors:Minoru WakiNaoki OkamotoIzumi Yasuda
C09D 11/40C09D 11/322
42
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Claims

Abstract

An aqueous pigment dispersion for ink jet having a pigment dispersed, characterized by containing a water-soluble resin and a resin having a urethane bond and/or an amide bond.

Claims

exact text as granted — not AI-modified
1 . A pigment dispersion for ink jet having a pigment dispersed, which comprises a water-soluble resin and a resin having a urethane bond and/or an amide bond.  
     
     
         2 . The pigment dispersion according to  claim 1 , which is obtained by blending the water-soluble resin with the pigment, finely pulverizing the pigment in a kneading step and a dispersing step, and further adding the resin having a urethane bond and/or an amide bond thereto to cause crosslinking.  
     
     
         3 . The pigment dispersion according to  claim 1  or  2 , wherein the resin has a crosslinking rate of from 20 to 100%.  
     
     
         4 . The pigment dispersion according to any one of  claims 1  to  3 , which is a dispersion for ink jet.  
     
     
         5 . An ink composition for ink jet having a pigment dispersed, which comprises a water-soluble resin and a resin having a urethane bond and/or an amide bond.  
     
     
         6 . The ink composition for ink jet according to  claim 5 , which is obtained by blending the water-soluble resin with the pigment, finely pulverizing the pigment in a kneading step and a dispersing step, and further adding the resin having a urethane bond and/or an amide bond thereto to cause crosslinking.  
     
     
         7 . The ink composition for ink jet according to  claim 5  or  6 , wherein the resin has a crosslinking rate of from 20 to 100%.  
     
     
         8 . An ink composition for ink jet, which is obtained by adding an organic solvent to the pigment dispersion as defined in any one of  claims 1  to  3 .  
     
     
         9 . An ink jet recording method, which comprises printing by discharging the ink composition for ink jet as defined in any one of  claims 5  to  8  from a nozzle of an ink jet printer.  
     
     
         10 . An ink set having the ink composition for ink jet as defined in any one of  claims 5  to  8  charged into a cartridge.

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