Liquid set for ink jet recording

Abstract

A liquid set for inkjet recording, includes (i) an aqueous treatment liquid including a polyurethane resin obtainable by reacting a polyester polyol, a diol containing a quaternary N-atom or tertiary amino group, and a polyisocyanate, wherein the quaternary N-atom or tertiary amino group is present in a side chain of the carbon chain linking the two hydroxyl groups of the diol, and the polyester polyol is obtained by reacting a polyol and an aromatic polycarboxylic acid; and (ii) an aqueous inkjet ink including a colorant. A method for inkjet printing includes using the liquid set.

1 - 10 . (canceled) 
     
     
         11 . A liquid set for inkjet recording comprising:
 an aqueous treatment liquid including a polyurethane resin obtainable by reacting a polyester polyol, a diol including a quaternary N-atom or a tertiary amino group, and a polyisocyanate; and   an aqueous inkjet ink including a colorant; wherein   the quaternary N-atom or the tertiary amino group is present in a side chain of a carbon chain linking two hydroxyl groups of the diol; and   the polyester polyol is obtained by reacting a polyol and an aromatic polycarboxylic acid.   
     
     
         12 . The liquid set according to  claim 11 , wherein the aromatic polycarboxylic acid is selected from the group consisting of terephthalic acid, isophthalic acid, and a combination thereof. 
     
     
         13 . The liquid set according to  claim 12 , wherein an amount of the isophthalic acid in the polyester polyol is at least 20 mol %. 
     
     
         14 . The liquid set according to  claim 11 , wherein the colorant includes a pigment. 
     
     
         15 . The liquid set according to  claim 12 , wherein the colorant includes a pigment. 
     
     
         16 . The liquid set according to  claim 14 , wherein the aqueous treatment liquid includes a white pigment. 
     
     
         17 . The liquid set according to  claim 15 , wherein the aqueous treatment liquid includes a white pigment. 
     
     
         18 . The liquid set according to  claim 11 , wherein a polyether diol is present during the reaction of the polyester polyol, the diol, and the polyisocyanate. 
     
     
         19 . The liquid set according to  claim 18 , wherein the polyether diol is a compound according to Formula 1: 
       
         
           
           
               
               
           
         
         wherein 
         R1 is methyl or ethyl; 
         R2 is C 1 -C 4 alkyl; and 
         n represents an integer from 5 to 50. 
       
     
     
         20 . An inkjet recording method comprising:
 providing a substrate and the liquid set according to  claim 11 ;   applying on the substrate, the aqueous treatment liquid of the liquid set;   jetting the aqueous inkjet ink of the liquid set on an area of the substrate where the aqueous treatment liquid was applied; and   drying the aqueous inkjet ink.   
     
     
         21 . The inkjet recording method according to  claim 20 , wherein the aromatic polycarboxylic acid is selected from the group consisting of terephthalic acid, isophthalic acid, and a combination thereof. 
     
     
         22 . The inkjet recording method according to  claim 20 , wherein the applying of the aqueous treatment liquid includes ink jetting the aqueous treatment liquid. 
     
     
         23 . The inkjet recording method according to  claim 21 , wherein the applying of the aqueous treatment liquid includes ink jetting the aqueous treatment liquid. 
     
     
         24 . The inkjet recording method according to  claim 20 , wherein the applying of the aqueous treatment liquid includes applying the aqueous treatment liquid to form an image.