Resin for toner and toner

Abstract

A resin for toner containing a resin component having both a polyester unit produced by polycondensation of a polyhydric alcohol component and a polycarboxylic acid component, and an aryl group having a sulfonic ester group as a substituent; and a toner that contains the resin for toner.

1 . A resin for toner comprising a resin component having both 
 a polyester unit produced by polycondensation of a polyhydric alcohol component and a polycarboxylic acid component, and    an aryl group having a sulfonic ester group as a substituent.    
   
   
       2 . A resin for toner according to  claim 1 , wherein the aryl group having a sulfonic ester group as a substituent is a phenyl group having a sulfonic ester group as a substituent or a naphthyl group having a sulfonic ester group as a substituent.  
   
   
       3 . A resin for toner according to  claim 1 , wherein the sulfonic ester group has a structure represented by the following formula:  
       —SO 3 R 1    
     where R 1  represents an alkyl group having 1 to 12 carbon atoms or a phenyl group.  
   
   
       4 . A resin for toner according to  claim 1 , wherein the aryl group having a sulfonic ester group as a substituent is bonded through any one of an amide bond, a urethane bond, and a urea bond.  
   
   
       5 . A resin for toner according to  claim 1 , wherein the aryl group having a sulfonic ester group as a substituent is bonded through an amide bond.  
   
   
       6 . A resin for toner according to  claim 1 , wherein the aryl group having a sulfonic ester group as a substituent is bonded through an amide bond represented by the following formula:  
     
       
         
         
             
             
         
       
     
     where R 10  to R 13  independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a hydroxyl group, or an alkoxyl group having 1 to 4 carbon atoms, and R 14  represents an alkyl group having 1 to 4 carbon atoms.  
   
   
       7 . A resin for toner according to  claim 1 , wherein the toner contains 0.1 to 0.9 mmol/g of the aryl group having a sulfonic ester group as a substituent.  
   
   
       8 . A resin for toner according to  claim 1 , wherein the polyester unit is bonded to a vinyl polymer unit formed by polymerization of a vinyl monomer component to form a hybrid resin.  
   
   
       9 . A resin for toner according to  claim 1 , wherein the resin for toner has a weight average molecular weight (Mw) calculated by gel permeation chromatography within the range of 2,000 to 200,000.  
   
   
       10 . A resin for toner according to  claim 1 , wherein the resin for toner has a ratio (Mw/Mn) of a weight average molecular weight (Mw) calculated by gel permeation chromatography to a number average molecular weight (Mn) within the range of 1.0 to 6.0.  
   
   
       11 . A resin for toner according to  claim 1 , wherein the resin for toner has a glass transition temperature within the range of 45 to 90° C. in a DSC curve measured by a differential scanning calorimeter.  
   
   
       12 . A resin for toner according to  claim 1 , wherein the resin for toner has an acid value of 0.1 to 40.0 mgKOH/g.  
   
   
       13 . A toner comprising toner particles that contain at least a binder resin, a colorant, and a resin for toner according to  claim 1 .  
   
   
       14 . A toner according to  claim 13 , wherein the resin for toner is contained in an amount of 0.1 to 20.0 parts by mass with respect to 100.0 parts by mass of the binder resin.  
   
   
       15 . A toner according to  claim 13 , wherein the toner contains a wax and has a maximum heat absorption peak within the range of 45 to 130° C. in a DSC curve when the temperature of the toner is elevated as measured by a differential scanning calorimeter.  
   
   
       16 . A toner according to  claim 13 , wherein the toner has a weight average particle diameter (D4) of 3.0 to 9.0 μm.  
   
   
       17 . A toner according to  claim 13 , wherein the toner particles is one formed by a production method that involves a step of dispersing a composition that contains the resin for toner in an aqueous medium.